Evinrude 90 questions

[jorgeinmiami]

Along with the Checkmate came this engine that the prior owner says he rebuilt with high performance parts. This is why he sent me as to what he did to it.

Is this something interesting or is it just crap?

That engine has been bored out 30 over . And re sleeved. It has forged Wiseco racing Pistons. The block has been ported 4 high flow. The heads are milled for high-compression. Polished and balanced racing crank. Exhaust tube has been shortened and opened up. The lower unit has been drilled out to let the exhaust out before it goes through the prop. For higher acceleration at lower speeds. Bigger carburetors with bigger Jets. Advanced timing. The engine runs just fine on 90 tes pump gas. It does have more power if you use 115 leaded racing gas. But it's not necessary