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2 stroke compression question

Old 07-26-2020, 07:51 PM
  #31  
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Originally Posted by mcollinstn View Post
Yes, you are right.. Nobody makes ultralight 2 stroke outboards anymore. It's a shame. For what you describe, I would look into a powerhead or block.

Complete powerhead -
https://www.ebay.com/itm/Yamaha-Outb...-/254663384100

Above motor may have salt rot in it. I suppose you could ask the guy to pull off the exhaust chest cover and send pictures...

Or, here is a very pretty bare block. You might want pictures of the cylinders..

https://www.ebay.com/itm/15HP-63V-15...-/273383360024
That powerhead looks a little rough, especially coming from Florida. Mine was like new on the outside.

I found a new Yamaha case for just over 1000. I seen the China version. Much cheaper but I worry about the quality. The machining tolerances and also the metal quality.

Thanks
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Old 07-26-2020, 07:57 PM
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Originally Posted by oconnor marine View Post
clean real good with brass brush and apply marinetex. Let cure and flat file. Reasemble with new gaskets
Hummm I never thought of that. I'm trying to salvage the summer and I could worry about building a new power head over the winter.

Thanks for the idea!!
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Old 07-26-2020, 07:58 PM
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Originally Posted by underpsi68 View Post
Hummm I never thought of that. I'm trying to salvage the summer and I could worry about building a new power head over the winter.

Thanks for the idea!!
ive done it many times
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Old 07-26-2020, 08:20 PM
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Originally Posted by oconnor marine View Post
ive done it many times
how does it hold up long term?

I'm also concerned the compression is low. I won't know till I put it back together.
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