Rotax 657 - Reaplace Con Rod without disassembling crankshaft?

[randomguy]

Hey guys:

So I've got a bent con rod on my old '94 657. I'm currently waiting on the PTO spline tool to get the PTO FW off the back end so I can disassemble the crankcase.

But after reading a little bit here and there, some seem to indicate that you can't remove the lower con rod pins without complete disassembling the crankshaft.

I was really hoping to just replace the rod and reassemble with only the bare necessity of replacement parts like rings and seals and gaskets and stuff. Maybe wrist bearings. Is this even possible?

I don't have much invested in the boat and I doubt whether it's worth the investment of a new crank or even a whole engine. If I can reuse this crankshaft, I'm considering just parting this one out or trying to get whatever I can get out of it as is. What do you think?

Thanks!

 

[Dr Honda]

Nope... these aren't like car rods. They don't unbolt. The only way to get it off the crank is to press the end of the crank off. Your best bet is to buy a rebuilt crank. It will come with new rods, bearings, and seals.

FYI... I own the equipment to press a crank, and I only do it for restoration projects. (normally old motorcycles) Something like a seadoo crank... I just buy them already rebuilt... or a new crank from "Hot-Rods."

 

[randomguy]

So I'd be able to buy one balanced and ready to drop in? Obviously I can look at SBT. Any other recommendations for a source?

Thx!

Nope... these aren't like car rods. They don't unbolt. The only way to get it off the crank is to press the end of the crank off. Your best bet is to buy a rebuilt crank. It will come with new rods, bearings, and seals.

FYI... I own the equipment to press a crank, and I only do it for restoration projects. (normally old motorcycles) Something like a seadoo crank... I just buy them already rebuilt... or a new crank from "Hot-Rods."