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  Repower OR 22 - Yammie 4 stroke same as Merc?

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Author Topic:   Repower OR 22 - Yammie 4 stroke same as Merc?
Plotman posted 07-26-2003 02:51 PM ET (US)   Profile for Plotman   Send Email to Plotman  
I am narrowing down my options for repowering my 0utrage 22 - on one of the earlier posts someone mentioned that the Yamaha and Merc 115 4 stroke are the same engine?

I'm confused. I know about the Johnson/Suzuki thing, and also Merc/Mariner and Evinrude/Johnson from days of old, but I've never heard of the Yammaha/Mercs being twins.

Jamie 20 outrage posted 07-26-2003 05:06 PM ET (US)     Profile for Jamie 20 outrage  Send Email to Jamie 20 outrage     
To answer succintly, they are and are not the same. I have the paper at work that tells which is which, but if memory serves, only the actual powerheads on this horsepower motor are the same. Where Yamaha has had problems, is that they use the drive shaftr that goes to the lower unit to power the oil pump. Merc used a metal gear, Yamaha, nylon. The nylon gear has been failing, usually during a water pump change that require the lower unit to be removed and put back on. Yamaha blamed the mechanics-BS. Yamaha also used too small of a hole to allow cooling water to cool their exhaust housings. With age this hole clogs and the aluminum exhaust housing overheats and melts. If it were me I would pick the Honda, we have them in the VI with daily used sightseeing boats and now that they have corrected the exhaust area cracks, they have been wonderful performers and the parts are a whole lot less expensive than the Merc/Yam/Tahatsu mess.
Plotman posted 07-26-2003 05:23 PM ET (US)     Profile for Plotman  Send Email to Plotman     
The problem with the Hondas is that they weigh considerably more than the Yamaha's / Mercs. Two of the latter is already psuhing it for transom weight on a 22 - two hondas is unfortunately just too much.

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