Yanmar 1GM Troubles

[Greg Jones]

I've got an '84 Yanmar 1GM7 (6.5 hp) on my OD 26. While motoring back to the mooring last night the motor began to lose power and slowly the RPM's began to bog down. I was able to shift it into neutral and rev it back up so it did not stall, but it still would only manage about 12-1400 rpm in neutral and barely 700 rpm in gear. I sailed into the mooring in neutral and am wondering what's up. The boat's been in the water about 3 weeks so I don't think the prop is fouled w/ barnacles yet. Could there be too much winter stabilizing stuff in the fuel? Lastly it got new fuel and oil filters prior to being launched this season. Any thoughts?Thanks, Greg Joness/v Encore

 

[Joe Barrett]

Check Fuel Pump

Fuel pump may be old, also check fuel lines and injectors. I also just had a company come and polish the fuel and tank by running all fuel from tank into a mobile fuel filtering system.When I read your post I immediately thought fuel filters, check your Racor for water if you have one.

 

[Greg Jones]

Thanks Joe

Thanks Joe, I'll try out your recommendationsGreg Jones