Issue With Yam Metallurgy?

[BQUICK]

This^
I recently bought an used engine, Yamaha, from a repair shop that deals with hundreds of engines of all makes. I had asked him what he thought about Hondas because I was considering a boat that had one. He replied they were good engines but also suffer from corrosion issues. He said all 4 strokes do. He showed me a pile of parts that were removed from corroded mid sections and they included all colors.
He said you mainly hear about Yamaha issues because.......(enter drum roll)....

Call me crazy but I still say adding some 2 stroke oil or Marvel Mystery oil to the gas of a 4 stroke will minimize mid section corrosion.

[pstephens46]

Call me crazy but I still say adding some 2 stroke oil or Marvel Mystery oil to the gas of a 4 stroke will minimize mid section corrosion.

But would you have to use at a rate that could foul something else in the system? Kind of hard to test now with the batch of F225s with the most problems, either dead or parts replaced.

[boscoe99]

Adding oil and other substances to gasoline can reduce the octane rating. The F225 does not use a knock sensor.

Mid-section corrosion could then be the least of an owners worries.

[Captn Dave]

I see many more light grey motors pooting around here than black or white....

Bingo!!!!!