2-Stroke Rebuild How difficult or how Much?

[sherboat]

Anyone have experience with doing a rebuild? Have you done it yourself, is it difficult? Are there shop manuals to use? What kind of shop do you get the cylinders re-bored? Where can you buy pistons, rods etc?

What might it cost to get a shop to do the whole thing?

The motor in question is a '91 115hp Yamaha, v6 I believe. Current diagnosis is one cylinder with low compression, and there is a little bit of movement on the piston.

Thanks in advance for your help.

 

[Last Chance]

Usually it's not worth doing, I've never done it but know people who have. If you are going to bore it, you need to send the block to a two stroke specialist like Mongoose in Vancouver, otherwise, more often then not, KA-BOOM. The motor is only worth a couple grand in mint shape, so I don't think it makes sense economoically. Besides, getting stainless bolts out of old aluminium can be fun, you may break a whole bunch off.

It's really not anything like putting a ring and gut kit in a small Chevy, I don't know if I would bother. And don't forget, the rest of the motor is still 16 years old.

 

[Island Fish Lifter]

ive done many. The first thing to do is tear it down and inspect, measure etc... If you have any questions, Id be glad to help. Where are you?

 

[sherboat]

I'm in the lower mainland. I don't own this motor, I was looking at a used boat, and was wondering if there was a deal to be had with a little DIY. I like taking things apart and learning how they work.

Shortly after I made the post, someone else scooped it.

Thanks for the advice guys.

Cheers.