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Have a yanmar 6lp-stp2 that surging at idle and stalling
Hey i have a yanmar 6lp-stp2 that surging at idle and stalling after i advance rpms and back off. it is idling high at 1000 rpm . Its also not reaching anymore that 2100 rpm while underway … read more
Jason
Jason
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Vocational, Technical or Trade School
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2013 Yamaha F90, with 704 remote throttle control. RPM
2013 Yamaha F90, with 704 remote throttle control. RPM occasionally drops for a couple of seconds at low to medium RPM's. Stalls when this happens at idle. Is there diagnostic software as in automobil… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I did as you said, but the problem remains. the voltage from
Charles, i did as you said, but the problem remains. the voltage from the stator is so variable I cannot get a steady reading with a dvm, but it fluctuates and I see readings up to 195, and all over t… read more
Charles
Charles
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Tan
Tan
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Yanmar 2GMf (about 1984). Engine surges and knocks at higher
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Expert
Expert
First of all thank you. I have an issue with a 150 hp efi
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Charles
Charles
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1998 Mercury 4 stroke - 25hp - Idle issues. I have owned this
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Joe
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I have a 1992 Mercruiser 7.4 with 1100hrs that other than requiring
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Tan
Tan
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I have a 1996 28 sea ray with the 7.4 liter MPI engine in
I have a 1996 28' sea ray with the 7.4 liter MPI engine in it. The boat has just under 400 hours. When I am running about 3000 rpm, the engine bogs down a little (drops 1000 rpms), then seems to relea… read more
capt ron 1959
capt ron 1959
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I am ppurchasing a 2008 yamaha 40 hp fourstroke. The engine
I am ppurchasing a 2008 yamaha 40 hp fourstroke. The engine will not hold a steady rpm between 1000 and 2000 RPM when undeway. It either surges or losses 500 to 1000 RPM. From 2000 RPM up it seems to … read more
Jason
Jason
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Vocational, Technical or Trade School
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Hi Tan. Thanks for the previous help on the motor. After
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Tan
Tan
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I have a 1997 Evinrude 30 teleud outboard with very low hours
I have a 1997 Evinrude 30 teleud outboard with very low hours of use that starts and runs smooth until 4500 rpm at this point the stator plate begins to surge back and forth causing the motor to not r… read more
Jeff G.
Jeff G.
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I have a 2004 Yamaha 90 2-stroke. Runs great... but doesnt
I have a 2004 Yamaha 90 2-stroke. Runs great... but doesn't idle perfectly - coughs and stalls... seems to idle at a very low RPM.... also a touch slow to start the engine (don't know if that's relate… read more
Jason Forsberg
Jason Forsberg
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my but will rev up with just the throttle but when i drop it
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Jeff G.
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02 Suzuki DF 140 Fished all day last Wednesday - motor ran
02 Suzuki DF 140 Fished all day last Wednesday - motor ran fine. Launched Thursday morning - motor started right up, ran fine for 5 minutes to a no-wake zone, idled smoothly thru zone - then jumped ba… read more
Jason
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I have a 1997 Mercruiser 7.4L inboard that will not rev up
I have a 1997 Mercruiser 7.4L inboard that will not rev up smoothly from 800 RPM to 1200 RPM. When I accelerate (transmission in gear) the engine surges from 800 to just over 1200 RPM. Past that the e… read more
Dominick
Dominick
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Took my 1983 80 hp merc to the lake today ran fine starting
Took my 1983 80 hp merc to the lake today ran fine starting off stopped to fish and when I restarted the motor seemed to miss badly would not get over hi idle and died when pushed to mid throttle. too… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
I have twin 4.3 liter mercruisers with alpha one drive on a
I have twin 4.3 liter mercruisers with alpha one drive on a 1998 sea ray 290. one engine is running at 400 rpms higher than the other 260 hours. I have recently had them both tuned so plugs and cap ar… read more
gearheadII
gearheadII
Bachelor's Degree
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