OT: Need Help with engine

[Crabslayer]

MY 115hp Johnson won't stay running at idle. I replaced the plugs checked and cleaned the carbs but will only run at higher rpms. Not sure if it is linkage problem. Anyone have any ideas?[sad]

[john pearce]

Maybee the Ethanol? Do you have a fuel / water seperator, might try changing the filter if you have one and if you don't I'd be sure to add one pretty soon, from what I've heard that Ethanol cleans your tank and hoses thus loosening up all the gunk, gotta catch it somehow.

[Bill Swartz Jr.]

CS,
Had the same problem. Check my post on the Boat Talk forum under '40hp Yamaha won't idle'.....!
Geo

[POLECAT]

Fuel pump weak???

[b dog]

try calling o m c parts/ lindenhurst outboard service 1-613-225-0077. they have helped me many times. ask to speak with tech. explain trouble and they will try to troubleshoot and dir.you to part needed. can order part from them overnite shp. they can tell you tests to run yourself if your up to it. hope this helps b.dog

[Water_boy]

Not meaning to scare you but it's also a sign of low compression... Is it running smokey?

[Bob H.]

Low speed jets/passage clogged. Spilt and clean the carbs.

[Burchbeer]

Bob H said what I was thinking.

Carb problems. Service same. Call me in a.m.

I take mine to the boat doctor.

I have no patience for busting my knucles anymore.

Good Luck.

I also prescribe CFIII.

DB

[POLECAT]

I agree with that diagnosis as well, however, Brian said he cleaned the carbs..............

If they were cleaned properly, etc...... I'd still give it a good dose of Sea Foam and also check the fuel pump diaphragm.


These motors aren't that complicated........... only when they don't work properly[grin]

[Crabslayer]

Thanks all. Will let you know with what I come up with. They're great when they're running but oh when they give you a fit. @#%&*.[sad][grin]