Re: Engine Blow By?
I must admit I am fairly new to Seafoam. I was advised to use it in an motorcycle engine I have. It has 6 carbs, but it was interesting since nothing in Seafoam is going to reverse the effects of Ethanol, so it seemed like a waste of money and time.
So to answer your question, it would be not really.
Regular and often oil changes seem to be the best action for 4 stroke power sections, as far as I am concerned and occasional fuel system cleaner seems to correct most of the poor fuel system performance issues for me. Being new to boat motors, I stand with my ears open to hear as much as possible, just like you.
The internet is sure an awesome place.
Sea Foam is another one of those products that sort of falls into that ... does it really work categories. The answer, sort of.. I've soaked carboned up pistons in it and had mixed results but it's actually supposed to be used in a running engine so it's not as effect when just soaking. I think the Quicksilver products are just as good in a running engine.
Sea Foam has been around a lot longer than Ethanol so in that regard I'd have to say no, it's not going to do much for you. I would rather trust Marine StaBil for Ethanol for that purpose and I do.
What Sea Foam seems to do best is ub decarbonizing a running motor. When mixed with fuel, heated and pressurized in a cylinder it is effective at breaking down the carbon buildup on piston tops and ring lands.
Rislone and Marvel Mystery Oil are the two best products I've found for trying to prep a motor that's been sitting for a long time. Truely, the best method is to tear it down and go through it but if that is not possible then sometimes, and I do mean sometimes, the use of either of these products might do the job.
There are times when you don't want to use it such as oil bath motors with roller bearings. As was mentioned in a prior post, the debri that is broken loose could damage the bearing surfaces since it will not be filter out prior to running.