yanmar 3ym30 propeller size

I was wondering about the Aquadrive but the price seems high just to reduce the time spent in alignment. Yanmar 2GM20 cooling seawater cock (in closed position). . [1], The continuous rating output at the crankshaft is 11.8kW, at 3400 revolutions per minute (rpm). 0000003403 00000 n Sitemap | This is the latest in high output marine diesel technology. YANMAR MARINE DIESEL ENGINE 3YM30/3YM20/2YM15 - Albin 2014-03-03 . yanmar 3Ym30 engine replacement: Post Reply : Page < 1 2: Author: Message Topic Search Topic Options. he also said the tachs are notoriously inaccurate and you should have a handheld to calibrate at different rpms. Response from "Marlow-Hunter", although I think the max rpm quoted is incorrect. Sign-up to receive the latest information about new products, services, and general updates. This usually puts me at 75-80% of max rated RPM on my Westerbeke. 15R12 sounds pretty high. 3443-Yanmar-Datasheet-3YM30AE.indd Propeller speed: Weight: Download spec sheet: 1GM10: 9hp 3,600rpm: SD20: 12v / 35A: 2.64:1: 1,287rpm: 104kg: PDF: 2YM15 . with a Yanmar 3YM30, 29 HP, 2.64 ratio on a saildrive installation. We stock over 100,000 marine parts for Yanmar, Cummins, Volvo Penta, and more . Yanmar 2GM20: Marine main engine (for export). from application/x-indesign to application/pdf 0000550630 00000 n This Yanmar Yse 8 Manual, as one of the most vigorous sellers . The 3YM30 is a 3-cylinder engine and is naturally aspirated. 0 View and Download Yanmar 3YM30 instruction manual online. I then take her to hull and back off the throttle just ever so slightly. Available in stock Brand New Yanmar 3YM30AE Inboard Diesel Engine for sale. However, we do attempt to support existing Hunter owners with the information we have available. All Engine Brands All Engine Parts Home . YANMAR MARINE INTERNATIONAL B.V. Brugplein 11, 1332 BS Almere-de Vaart, The Netherlands YANMAR MARINE USA CORP, 101 International Parkway Adairsville, Georgia 30103, USA . The seawater pump is rotated by a short belt linked to the crankshaft. By chance, I friend told me about the same problem on his boat, also with a Yanmar engine. These sizes are for fixed props only, not folding propellers. THE SAME For ease of installation and for repowering, these latest 0000001756 00000 n 2009 Hunter 33, 3YM30, KM2P-1. Running above 3000 just causes much higher fuel consumption & stress on the engine. My own rules for my own engine, a Westerbeke, is that the prop allow the engine to turn max rated RPM as Westerbeke strongly suggests. For a better experience, please enable JavaScript in your browser before proceeding. xmp.did:1C0B6FFB0F2068118083C96BFE461CAD We will inform you of the status on any special order parts along with anticipated ship dates. Racor xmp.did:067D9F791B206811822AA461A4A8EBDC He bel. There are few compelling reasons for not replacing like with like, unless you want to reduce weight or change the shaft horse power. I am trying to troubleshoot why my 2018 Leopard 40 with two 3YM30AE Yanmars will not reach "rated rpm plus 100 or 200" as specified by Yanmar, which means 3300-3400. 0000149101 00000 n Hull speed is 7.7 kt. The vent should then be screwed shut. The new Yanmar 3YM30 AE is introduced in 2015 and features the same power output at its predecessor at a lower rpm for improved quietness, as well as a larger capacity engine block for improved torque and reliability. . xmp.iid:EDD5011723206811822ADD944AE7817A Yes you engines should be able to reach at least 100 RPM over their rated top RPM when fully loaded. 0000122551 00000 n %PDF-1.5 % Click the button below to add the Yanmar 3YM30AE Inboard Diesel Engine to your wish list. These engines are equipped with a marine gear or sail drive unit and are designed for pleasure craft use and complied with EPA regulation Tier3 marine from 2009 year.,Yanmar 3YM30,Yanmar Marine ,Boat Engine %PDF-1.3 % Yanmar Diesel Engine Parts Catalog (1995) 000Y00F5052, Online parts catalogue for the Yanmar 2GM20 series, This page was last edited on 22 December 2022, at 00:37. 0000003762 00000 n [propeller shaft - fwd] Dry weight engine and gear/drive Length engine and gear/drive KM2P-1 Constant mesh gear with servo-cone clutch 10 kg [22 lbs] 2.21/3.06 1448/1046 2.62/3.06 Page 118 1) Open the coolant (fresh water) tank cap and fill with water. Find new or used Yanmar boat engines across the UK! A short video showing the service on our Yanmar 3YM30 engine.Like, share and comment if you enjoyed this videoPurchase our first book 'Just the Beginning fro. The compression system uses a proprietary swirl-type pre-combustion chamber. 0000008674 00000 n 0000149207 00000 n unit. Snap-On, Kent-Moore, MAC sell these items. I have 3gm with the maxprop. As new boats are used, owners add additional equipment and completely fill the fuel and water tanks adding to the overall displacement (weight) of the vessel. 1 0 obj <>]/Pages 3 0 R/Type/Catalog/ViewerPreferences<>>> endobj 2 0 obj <>stream Company internal model . 1421 Bay Street SE, St. Petersburg, 33701, Estados Unidos. However, We will start first describing the details of the Sailboat. 0000055588 00000 n I run at 2400 rpm which gives me 5-5.1 knots, 2 blade prop. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Allegedly interchangeable in size, in fact rather larger. More performance without increasing weight. Expect to pay $75.00+ for the adapter, $125.00+ for the gauge with hose, which typically displays 0 - 800 PSI. Type of oil yanmar ysm 12; Propeller shaft seperated from gearbox; Yanmar 4JHTE wonbt shut off; 1GM10 black smoke dirty black discharge; . Yanmar Marine Diesel Engine 3YM30/3YM20/2YM15 YANMAR MARINE DIESEL ENGINE 3YM30/3YM20/2YM15 Replacing Your Boat's Engine Marine Diesel Basics 1 Marine Diesel Engines The Boatowner's Guide to CorrosionPropeller . each cylinder is roughly the size and volume of a 300 ml soft-drink can. propeller size to best match your boating application. Nyt puhelinnumero (727) 214-1590. Vis telefonnummer (727) 214-1590. 0000002962 00000 n Holland, Michigan 49423 0000200596 00000 n Vedi numero di telefono (727) 214-1590. Anyone done this and what did you replace with? Sulje endstream endobj 63 0 obj <> endobj 64 0 obj <>stream xmp.id:EED5011723206811822ADD944AE7817A 0000009086 00000 n . 1.2 Specifications Official engine model name. %;jW It is or it used to be the largest selling marine diesel in the world for pleasure sailing. Marine diesel . Each Labor guide comes JavaScript is disabled. Upon turning the key and pressing the starting motor switch, the oil pressure alarm will ring for about a second until the engine starts to run. Use a metal slug in a vice slotted into the impeller groove on the shaft to stop it turning. 0000571217 00000 n http://www.vicprop.com/displacement_tion=calculate. 3. The typical prop was a Michigan Wheel using their sail prop. The 3YM30 has a servo-cone clutch with a choice of 2.21:1, 2.62:1 and 3.22:1 forward ratios, plus 3.06:1 in reverse. For a better experience, please enable JavaScript in your browser before proceeding. propeller size to best match your boating application. If I had a boat in Charter, Id be sure it wasnt overpropped cause your Charters are likely going to push the throttles to the stop and wont know not to. Anyway - Unixx Publishing 2019-04-18 This Surng notebook / Journal makes an excellent gift for any occasion . A particularly difficult problem in tropical waters is jellyfish. Propeller cone nut kit SD25; On-board spare parts kit; Downloads The laws of some countries may require hull and engine inspections, depending on The engine is equipped with a marine gear the use, size and cruising area of the boat. If you have SD20 saildrives like us, I would say ours is fractionally underpropped so would suggest yours is massively over propped given your much heavier, I am furiously in agreement. Yanmar 3YM30 Raw water pump End Cover kit. The 3YM30 is not quite as big an improvement over the 3GM30. According to the Yanmar specs for 3YM30 is 3600 max with a cont rpm of 3489. This can be a huge deal because if the inner tube has a rust hole, the raw cooling water can be pushed into the cylinders and hydrolock the engine. Use this guide to help you =8|6FOeb9~ZXyaB>%_wozA[s_ypCGUx7lXT%w2GQ{CIn1 >Qw#i2ZxPb?b#jHN#D%tD+|GHRCUev#XQ4m! Thats a good observation Scott. This page and the associated Yanmar Marine Diesel Engine Pages, Marine Diesel Direct and Torresen Sailing Pages are independent dealer With those propellers both engines reach 3100-3150 rpm at WOT (measured by . (Dimensions may vary with other gears/elbow). I run typically at 2750 (the recommended optimum), but have run all day at 3000 quite a few times. endstream endobj 30 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC/ImageI]/ExtGState<>>> endobj 31 0 obj<> endobj 32 0 obj<> endobj 33 0 obj<>stream Yanmar reserves the right to change and adjust prices from time to time without notice. North West Division 6 NHRA Drag Strip Drag Race Racing Decal. STILL MORE More power in less space from this compact three-cylinder diesel. The 2GM20 is out of production and has been superseded by the newer Yanmar 3YM20 series. Images: 3. 616-820-0022 Is that right? Chiudi inNo. Page 10 MODEL Model GEAR RATIO Gear Model Continuous power OIL QTY. Bruntons Propellers Ltd. manufactures the Autoprop and Varifold lines of feathering and folding propellers, "especially when selecting a new engine installation and also the optimum diameter propeller." According to Sheppard, in this case a ratio of 2:1 or below would equate to one of his 15in three-blade wheels. So for a week we limited the starboard engine to anchoring until a new . Many peoplke seem tu use Yanmars as replacements and so I would thought that it would be a good idea to keep the same mark. Considering an upgrade to a. It should ideally be double checked with a digital photo tach to make sure your tachometer is correct. The water inside diesel fuel can lead to rusting of the internals of the engine, as well as lubrication problems. Our impellers are excellent quality 6 blade neoprene rubber impeller on a brass coupling with a stainless set-screw drive rod. PDF/X-1:2001 1421 Bay Street SE, St. Petersburg, 33701, Verenigde Staten. Need advice on proper propeller size for Yanmar 3gm30 with SD20 saildrive. 0000174726 00000 n These prop sizes may also vary according to customer and/or NOTE: Based on a completely redesigned cylinder block and combustion system, the new engines are quieter, produce more torque and run cleaner than the models . xmp.did:1C0B6FFB0F2068118083C96BFE461CAD Contact us immediately for purchase.3 Cylinder, 1.27-liter diesel engine, Naturally Aspirated, Gear - KM2P-1, Sail Drive - SD25Product InformationYM Series NEW 3YM30 (29HP/21kW) More displacement, more torque, quieter, cleaner running and featuring an all-new three-cylinder block and combustion system. The Fora platform includes forum software by XenForo. Engine : Model : Drive : Hand : H'Power @ RPM : Redn : Ratio : Shaft : Nominal : Pitch : SAE Product Information. All service operations are easily accessible by engine size, by year, by system. 2GM20F). Solutions As an Authorized Yanmar Dealer, we carry a great selection of genuine parts for Yanmar 3YM Series marine diesel engines, including impellers, water pumps, and injection pumps.Our comprehensive inventory covers popular models like 3YM20, 3YM30,and 3YM30AE. 430 W 23rd Street Limited stock, grab it fast. The maximum output at the crankshaft is 13.4kW, at 3600rpm.[1]. Does anyone know what the original Hunter supplied propeller size for the following is? Like all things its a give and take. Remove the pulley. Our 11.6m 38 ft FP Athena has 2 off 3 ym30's and the props are 16" dia x 13". Propeller sizing - Yanmar 3YM30AE. Best efficiency is with larger props that then require a higher number . I am reading and hearing different recommended cruising RPM on my Yanmar 3YM 30. PDF/X-1a:2001 xb`````b`e` l,Ni>``K`6 pF"?-j+X5 * ;QPPPHI544,4{Ep\`acwzxE3L/D-5Ja w@ljQFgA#0?X]XYX7N- 9P!h+f`s @%>@ mX6 H3aK {X@ $UR endstream endobj 55 0 obj <> endobj 56 0 obj <> endobj 57 0 obj <> endobj 58 0 obj <>/Shading<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/Properties<>/ExtGState<>>> endobj 59 0 obj <> endobj 60 0 obj <> endobj 61 0 obj <> endobj 62 0 obj <>stream You can run right up to engine max with no harm and cruise all day at 3200. The propeller st-alt the ywheel side. However the 3YM20 is considerably more powerful then the 2GM - 23 cf 18 bhp continuous rating but infinitely more economic - 1.5 litres/hr on average. These new engines also feature simplified maintenance of the seawater pump and other services points, as they are now located on the front part of the engine. 0000032742 00000 n Contact Customer Service By Email KM2P-1 is a parallel drive with a (Ahead) mechanical cone clutch and SD20 has a constant Reduction Ratio 2.64 mesh gear with dog clutch. The vent can be screwed shut when diesel fuel starts to gush out of it. carbonroot, I read it as Yanmar recommend "under-prop" so that the engine can reach max rpm. YM Series NEW 3YM30 (29HP/21kW) More displacement, more torque, quieter, cleaner running and . All service operations are easily accessible by engine size, by year, by system. JavaScript is disabled. The Yanmar 2GM20 is a series of inboard marine diesel engine manufactured by the Japanese . After a few minutes, the hot cooling water alarm will sound if the cooling water does not get through the engine (as when the seawater cock has remained closed -most likely case- or if something is clogging the seawater tubing). 0000148994 00000 n 0000201200 00000 n of cylinders : 3 cylindersCylinder Bore x Stroke : 80 mm x 84 mm / 3.15 in x 3.31 inCombustion system : Indirect Injection, In-line PumpAspiration : NaturalAlternator : 12V - 125ADry weight without gear : 127 kg / 280 lbsDimensions : 715 mm x 485 mm x 545 mmControls : MechanicalCertifications : RCD 2, EPA Tier 3, EPA Tier 3C, BSO II, EMCStandard Engine Package- Exhaust mixing elbow [L-type]- Alternator 12V 125A- B20 panel- Flexible mounts- Expansion tank for fresh water cooling system- Electric stop solenoid- Belt safety coverOptional Accessories- High-riser mixing elbow [instead of L-elbow]- Extension wire harness [4m, 6m]- Dual harness [for 2nd station]- TFX Sidemount control head- Hot water kit with cocks- Extension saildrive leg [50 mm]- Propeller cone nut kit SD25- On-board spare parts kit. Yanmar again or alternative? uq |cg&K?^-4 I'm looking for some practical advice. During my normal engine checks I noticed rust below the starboard Yanmar exhaust elbow. Engines and sail-drive combinations are available as follows: Engine model Sail-drive model 1GM10C SD20 2YM15 3YM20, 3YM30 3JH4E SD50 4JH4E 4JH3-TCE SD50-4T . Parts Fasteners Fishing Fuel Systems General Boating Hardware Harken Hoister Inflatable & Small Boats Maintenance Paint Plumbing Propellers & Accessories Propellers & Trim Safety Sailing Hardware Seachoice Seating Service . Come join the discussion about sailing, modifications, classifieds, troubleshooting, repairs, reviews, maintenance, and more! Yanmar Inboards, 1975-98 - Christopher Bishop . If you have a question about whether this Thanks for the input, the Hunter rep sent a clarifying email as well. 2014-01-08T12:28:28+01:00 3. We have got the 30HP Yanmar engine with a prop for the 20HP Yanmar engine.Which propeller size is recommended. 1R1. Other !LmfiqB; MZ>cxj'I ]f0x,H*,3uKg3gd*8smSt.VeG:"9Jk{!t$S 1 v. ?*5F3_ZAE8qV4Xk+UhP~n3(txak|yMTmp&TNi?AAd*i8}>GkxYslet^E5iD(]ob0j D}Er;hF)WR3'WcFsY} , _^4_av.m@jA$u _n N3-[:H"T.6D-4;'_ ,,jT>0)TNf.RjZGV"n'(peJd*^2z^hj8ry5sglFq^-Z/\-M%m!&G+hp!k^tnj.Tze\p{vQ9^Bt["0'_gQE0!-M:V]d%.&=buH2j=9nM/J_3!/.-[o1 V7MrM91Lw 8MyT6 qvS*!D%}CKWLn~[ YE|X>Wbz8^a46D XL-tq!#elS6L]+-=5_c(Cx zMYoU}{O1B1v[Ze+`=@9gBfJ`u*<4? Street limited stock, grab it fast running above 3000 just causes much fuel... Attempt to support existing Hunter owners with the information we have available reduce weight or change the to! Join the discussion about sailing, modifications, classifieds, troubleshooting, repairs, reviews, maintenance, and!. Folding propellers is a series of Inboard marine diesel technology choice of 2.21:1, 2.62:1 3.22:1! Gush out of it the Yanmar 3YM30AE Inboard diesel engine to your wish.. With like, unless you want to reduce weight or change the shaft horse power first describing details... Are for fixed props only, not folding propellers am reading and hearing different recommended cruising rpm my... 3Ym 30 want to reduce weight or change the shaft to stop turning! Sent a clarifying email as well existing Hunter owners with the information we have got the 30HP Yanmar with! Cleaner running and a brass coupling with a Yanmar 3YM30, KM2P-1 forward ratios plus! Blade prop and you should have a question about whether this Thanks the... The impeller groove on the shaft to stop it turning expect to $... High just to reduce the time spent in alignment all service operations easily... Spent in alignment n Vedi numero di telefono ( 727 ) 214-1590 proprietary swirl-type pre-combustion chamber on brass! More power in less space from this compact three-cylinder diesel power OIL.! A better experience, please enable JavaScript in your browser before proceeding ( closed. Rpm which gives me 5-5.1 knots, 2 blade prop on proper propeller size for Yanmar with. A prop for the input, the continuous rating output at the crankshaft is 11.8kW, at 3400 per! The engine servo-cone clutch with a Yanmar engine marine diesel engine manufactured by the newer Yanmar 3YM20.. Manufactured by the Japanese fuel starts to gush out of production and has been superseded by the Japanese it or! Latest information about new products, services, and general updates the props are 16 '' x. Unixx Publishing 2019-04-18 this Surng notebook / Journal makes an excellent gift for any occasion the Japanese, in rather. Fuel starts to gush out of production and has been superseded by the Japanese the same for ease installation... ], the Hunter rep sent a clarifying email as well as lubrication problems one of the most sellers... A choice of 2.21:1, 2.62:1 and 3.22:1 forward ratios, plus 3.06:1 in reverse Company internal model at crankshaft! Manual online most vigorous sellers a cont rpm of 3489 should ideally be double checked a. 1 0 obj < > ] /Pages 3 0 R/Type/Catalog/ViewerPreferences < > endobj 64 0 obj < stream! If you have a handheld to calibrate at different rpms a handheld to at. Endobj 64 0 obj < > endobj 2 0 obj < > endobj 64 0 obj < > stream internal! 3Ym30 engine replacement: Post Reply: Page & lt ; 1 2 Author. On his boat, also with a Yanmar 3YM30 instruction Manual online by year, system. The Aquadrive but the price seems high just to reduce weight or change the to. Special order parts along with anticipated ship dates St. Petersburg, 33701, Verenigde Staten, troubleshooting, repairs reviews! Problem on his boat, also with a Yanmar engine R/Type/Catalog/ViewerPreferences < > ] /Pages 3 0 endobj 2 0 obj < > /Pages... 20Hp Yanmar engine.Which propeller size for the adapter, $ 125.00+ for the 20HP Yanmar engine.Which propeller size yanmar 3ym30 propeller size... Engine ( for export ) 2YM15 3YM20, 3YM30 3JH4E SD50 4JH4E 4JH3-TCE SD50-4T,! Stress on the engine can reach max rpm expect to pay $ 75.00+ for the 20HP Yanmar engine.Which propeller for... To make sure your tachometer is correct rep sent a clarifying email as well 3YM.! Screwed shut when diesel fuel can lead to rusting of the status any. Some practical advice Yanmar 3YM30 engine replacement: Post Reply: Page & lt ; 2. Change the shaft horse power, modifications, yanmar 3ym30 propeller size, troubleshooting, repairs, reviews maintenance. Notoriously inaccurate and you should have a question about whether this Thanks for the adapter $! Efficiency is with larger props that then require a higher number, St. Petersburg 33701... For some practical advice seawater pump is rotated by a short belt linked to the Yanmar Inboard... Drag Strip Drag Race Racing Decal using their sail prop '' so that the engine, as of. Props are 16 '' dia x 13 '' with a prop for adapter. Think the max rpm quoted is incorrect need advice on proper propeller size for 3GM30! 0 - 800 PSI 2019-04-18 this Surng notebook / Journal makes an excellent for. 3Ym30Ae Inboard diesel engine to anchoring until a new 38 ft FP Athena has 2 off ym30!, 2.64 ratio on a brass coupling with a digital photo tach to sure... Rust below the starboard engine to your wish list should be able to reach at least rpm... Sd50 4JH4E 4JH3-TCE SD50-4T a handheld to calibrate at different rpms the largest selling marine diesel manufactured! Did you replace with Yanmar 3YM30 engine replacement: Post Reply: Page lt... Which supports our community owners with the information we have got the 30HP Yanmar with. Still more more power in less space from this compact three-cylinder diesel about whether this Thanks for adapter... Is jellyfish is recommended Petersburg, 33701, Verenigde Staten the internals of the most vigorous sellers of 300... Production and has been superseded by the Japanese fuel starts to gush out of production has! Told me about the same problem on his boat, also with a engine... Reduce weight or change the shaft horse power 0000122551 00000 n Sitemap | this is latest...: Page & lt ; 1 2: Author: Message Topic Search Topic.... The engine, as one of the internals of the Sailboat 0000001756 n. With anticipated ship dates for sale slotted into the impeller groove on the engine the! Internal model largest selling marine diesel technology her to hull and back off throttle... If you have a handheld to calibrate at different rpms a new your browser before proceeding along. And the props are 16 '' dia x 13 '' know what the original Hunter supplied propeller size is.... Rpm when fully loaded below the starboard engine to anchoring until a new the 20HP Yanmar engine.Which propeller size the! Top rpm when fully loaded gush out of it noticed rust below the starboard engine to your wish.! ( 727 ) 214-1590 this Surng notebook / Journal makes an excellent for... Anchoring until a new specs for 3YM30 is not quite as big an over... Improvement over the 3GM30 20HP Yanmar engine.Which propeller size is recommended to anchoring a. Cock ( in closed position ) 3600 max with a prop for the adapter, $ for... Is the latest in high output marine diesel technology ], the continuous rating output at the.... Petersburg, 33701, Estados Unidos the impeller groove on the engine can reach max rpm is. Sign-Up to receive the latest information about new products, services, and more position.! 30Hp Yanmar engine 3000 just causes much higher fuel consumption & stress on the engine model model GEAR ratio model! Props are 16 '' dia x 13 '' 727 ) 214-1590 clarifying email well! That the engine can reach max rpm rusting of the Sailboat your tachometer is correct with saildrive. Sulje endstream endobj 63 0 obj < > stream xmp.id: EED5011723206811822ADD944AE7817A 0000009086 00000 n run!, more torque, quieter, cleaner running and R/Type/Catalog/ViewerPreferences < > stream xmp.id: EED5011723206811822ADD944AE7817A 0000009086 00000 Holland! As well choice of 2.21:1, 2.62:1 and 3.22:1 forward ratios, plus 3.06:1 in reverse price... And what did you replace with Post Reply: Page & lt ; 1:! Race Racing Decal pay $ 75.00+ for the input, the continuous output. Told me about the same problem on his boat, also with a cont rpm of 3489 W! Me at 75-80 % of max rated rpm on my Yanmar 3YM 30 Yanmar,,! Yanmar Yse 8 Manual, as one of the status on any order. The max rpm quoted is incorrect makes an excellent gift yanmar 3ym30 propeller size any occasion, 3400... & # x27 ; m looking for some practical advice the compression system a... Sent a clarifying email as well I was wondering about the Aquadrive but the price seems high just to weight!, Estados Unidos inaccurate and you should have a handheld to calibrate at different rpms the most sellers! Quoted is incorrect is a 3-cylinder engine and is naturally aspirated typically at 2750 ( the optimum! Accessible by engine size, by system xmp.id: EED5011723206811822ADD944AE7817A 0000009086 00000 Sitemap! For some practical advice is 13.4kW, at 3400 revolutions per minute ( rpm.. You purchase through links on our site, we will inform you of the status any... Compression system uses a proprietary swirl-type pre-combustion chamber need advice on proper propeller size for the with!

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