? fuel problem?

[Tokanoa]

Chrysler 6.6 H.P.outboard, model #601 S# 4073. symptoms: in nutral have full thorttle, in gear have half power. New plugs (2-ice), cleaned carb completly, checked fuel pump *** ., checked all fuel line ball check valves from tank to carb. for blockage, O.K. Next question, - could this be a "clutch" problem? - can a spring work 1/2 way because it's broken? <br />Additional symptoms: seems when in nutral, when advancing the throttle, there's a "pause" at mid range, then sudden acceleration to full throttle, does not follow "flow" from throttle arm. No load - full throttle/ under load - half speed, sounds like only one cyl. is answering, but changed plugs 2-ice, have spark on both. Figured slow on gas somewhere, or something between eng and prop (clutch?). This symptom happened quickly, not a slow down over a period of weeks or months. Figured it's not something wearing, more like a brakage or clog - sudden. Any ideas would be helpful, the engine is clamped on the vise in the garage, haven't been sailing for 2 weeks!

 

[Mod2]

Re: ? fuel problem?

Moving to Chrysler/Force Troubles.

 

[scotiany]

Re: ? fuel problem?

I don't have a manual for you engine but, was the lower spark plug oily versus the top one? If so, and if your engine has a puddle valve, check it to see if it is dirty. Sounds like the same problem I had on my 55.

 

[Tokanoa]

Re: ? fuel problem?

Lower spark plug oily was my 1st thought. put in 2 new plugs, 2ice,- ruled out fouled plug, when in nutral (no load) have full "throttle", under load have 1/2 "power" - both plugs fire. Still question "clutch" below engine (spring?). That's as far as I can "figure". Either fuel or electrical, - think I'm going down a fuel road, or, drive line from engine to prop. Don't want to take entire outboard appart and rebuild 100%, and not know where I'm going. There must be a reason for these symptions. This came on fast like a light switch, not slooooley like wearing, so think something broke, got plugged, or froze up. Thanks so much for a reply, did not know what to expect! any ideas greatfully accepted - it's gotta make sense before I dig into the situation. The unit is still in the garage mounted on the vise. I'm a good sailor and can get out & into the harbor without an engine, but Kathy (wife) says she won't go! - why do they do that?

 

[scotiany]

Re: ? fuel problem?

One of the easier things you can do is rebuild the carb and fuel pump. I'm assuming that this engine sat around for a while. The fuel and oil settle to make a sticky combination. The rebuild kits are at NAPA for your engine. They are under $30 total. Soak carb body in solvent or gas overnight. Blow out all orifices with compressed air. and reassemble. Have fun.

 

[Tokanoa]

Re: ? fuel problem?

Thanks scotiany, I'll try that (soaking) and parts. Takled to someone who thinks it could be the clutch, knows snowmobiles but not O/B's. This enging is on my boat every summer, doesn't sit for more than 5-6 months during the winter (in the basement). Motor came with the boat that I bought in '87. Have rebuilt carb w new float, jets, etc. about 5 yrs. ago, never had a problem in the spring, she always fired up on 2-3 pulls. It's on a sailboat and I use for going out of, and into the harbor, so it has not had long hrs. on it.