'94 115 sneeze from carbs

[SKEETR]

Took the boat out and had a great test drive upriver. About halfway down river I started to smell gas a bit and lost a few 100 rpm. Throttled down to idle and the engine sputtered and sneezed. Throttled back up and ran back to the dock. Checked carbs and found problem with linkage adjustment, had to have slipped. Lower carb was not being allowed to close completely and wot went beyound parallel. I did a sync a few days before after soaking and rebuilding the carbs.
How could it have slipped that much?
Is a sneeze a symptom of this type of carb alignment problem at idle?

On an added note. My flywheel get's substantially hotter than any other component on the engine. It was painted by the previous owner. Should he have done that? Should I strip the paint off to help aleviate some of this heat?

 

[tashasdaddy]

Re: '94 115 sneeze from carbs

link n sync should be done after cleaning. paint does not help flywheel cool.

 

[Dhadley]

Re: '94 115 sneeze from carbs

Anything is possible so yes, it's possible the screw didn't get tight and the linkage slipped. Just reset the link and see.

The flywheel will be hot, a natural function of the magnets passing over the stator. Yes, it's OK to paint it. Some come from the factory painted.

 

[tashasdaddy]

Re: '94 115 sneeze from carbs

i stand corrected on paint, thanks.

 

[SKEETR]

Re: '94 115 sneeze from carbs

Thanks guys. I have never heard the engine act up like that before. One of these days soon I'll have the perfect test run.

 

[SKEETR]

Re: '94 115 sneeze from carbs

Sync'd up the carbs, again, and reset the wot stop. Reason being is I shifted carb locations due to some slop in the upper carbs shaft/linkage. I tried to pien it a bit more but it is almost impossible to get into a vice.

While reinstalling the air silencer I noticed a strange bolt down in the bilge. This is a 115 installed inboard on a jet drive. It came loose from a hole in the manifold located just in front of the starter. Is that the location where a premix fuel pump is attached on a different model? Guess I found my vaccume leak.