TOPIC: SeaFoam

'Nuff said.

No squitoes at your campfire tonight!

The old gal needs a few more treatments. Experienced some vibrations the other day when I was no waking to the point where the helm was shaking in my paws. Did a wet compression check Tuesday and came out with 135 to 140 on all four. Did a check on all coils and they all tested good. With this run pictured the motor would seem to run good a moment and then poorly. Idle would be slow and then increase. There were times when the entire boat would actually shake on the trailer. Has to be a lot of carbon and gunk hanging around in there yet and it needs to sit a day or so while the chemicals work and then run another warmup. Looking at rebuilding all four carbs probably over winter.
As a side note. I actually did clear out the skeeters.

I am not familiar with this type of trouble shooting as many are... would it be possible ( if you have diaphragm fuel pumps?) that the diaphragms are distorted from exposure to past use of ethanol fuels? The neighbors omc pontoon motor had a diaphragm that was shot from ethanol and when replaced, it ran nicely. Just another thought. Good luck smoothing her out.

Checked the fuel pump diaphragm, and ordered a new one. The diaphragm is shot like you suggested, really stretched out. even did the bulb pump while running, no change. All that gunk in the barrel isn't just dirty fuel. I think it needs a good run-out after the new diaphragm is in. I'm just glad it runs

That looks like the one we replaced. That motor will be a happy camper once you finish giving it a go over and run out. Most of my friends skied behind motors just like that. They were stump pullers and alway ran great.