Hello all,
I've sifted through some Ryobi posts, with the subject of converting them to RC & noticed a few comments of the nature of a max RPM of 7500.
Is the crank shaft the weakest link in this engine?
I've removed the crank from my Ryobi & have observed it's simplistic manufacturing method (fine engineering for the application).
If in fact the crank is the weakest link, would a replacement billet crank solve the crank shaft issue?
What kind of performance is to be expected with a billet crank (RPM, prop...)
What other issues are there?

HO-229

The stamped steel rod. If you compared the rod to other engines you would be amazed. Better to save the high rpms for other engines.

AV8TOR

Typically, a cheap whacker crank is not a forging. There is the main shaft, the counter weight, the and crank pin. They are just pressed together. They work fine in normal use. The Mac 32's are bad about the crank pin working out and rubbing a hole in the back plate.

Jim

Does the Ryobi have the deck height to be milled to a closer tolerance (boost compression)
Mill the jug/block?

HO-229