Logo
FULL SITE MENU

75HP Yamaha EFI Stalls out when throttling down

S

smatko

New member
I have a 75hp EFI Yamaha and it has run fine. Yesterday it started and ran fine at about 5000 rpms. Ater 20 minuets of running as I slowed down the engine started to run rough and eventually stalled out. I was not able to immediatly start it but after about 10 minuets it started and ran fine again. At the end of the day as I was pulling into the dock it did the same thing and I noticed what appeared to be a film of gas on the water. Thanks, Any ideas would be appreciated.
 
It could be something simple but it might be a blown thermostat and your motor is running cold thereby collecting condensate in the crankcase until it pushes into the intake via the crankcase vent. Check your oil and if it is high and emulsified change the t-stat, oil, filter run 10 min change again. run and hour and change again. Monitor closely.
Then again your vst maybe flooding or your lift pump may have a leaking diaphragm.
 
Back
Top