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I’m new to the forums but been reading a lot of good information but thought I might throw my situation out there and see what you guys had to say I recently bought a new 21’ Thunderjet Luxor OB OS (aluminum hard top fishing boat) with a new F200 Yamaha Outboard which has a recommended WOT of 5000-6000 rpms. I bought it at sea level and brought it up to 6500 ft. elevation (elevation sucks). So I have playing with props. I am currently running an aluminum 13p x 16” prop getting the motor broke in. I installed trim tabs to help plain out. It runs at 5800 rpm at 34 mph at WOT. I would l
I recently purchased a 1998 Sig 260 with the 5.7 EFI Mercruise with the bravo III. Engine has 320 hours according to dash gauge. We used it 3 times and blew a head gasket. The mechanic has tore the engine down and basically rebuilt it. New rings, crank turned, new bearings, valve job, gaskets, starter, water pump and coupling. I still have not gotten it back and have no idea what this bill will be. The mechanic has asked me several times what RPM does this engine turn. I don't recall ever seeing over 4 thousand. We get on plane and cut the throttle back to about 2300 RPM. Cruise
i have a 4.3l LX mercuriser engine with a 3 blade SS 19p vengence prop. My buddy asked me about my WOT RPMS and he said i have the wrong pitch. WOT is 3600 RPMS plane / cruise 2800 RPMs roughly The engine was replaced in 2010 i believe with a new one. i read online my WOT should be around 4400-4800, and each inch down gives me 200 RPM? Should I run a 15 or 16p prop on my boat to fall inline with the engine requirements?
Hey folks, I did a search on here and google but could not find what I was looking for. I'm pretty sure I've seen the answer here but can't find it. 2006 190SSi 4.3L Volvo Anyway, the other day I noticed my RPM's where higher than normal at what I felt was cruise speed (30-32MPH on GPS). I was running close to 4200RPM when it is normally around 3200. WOT was Maybe 5400 which is well above the range of 4200-4600 which it should be. At idle in neutral I was about 800RPM, and with the switch off the gauge stayed at 800. There were no weird sounds and the engine didn't sound any different from