Formula for success with the Yamaha SHO

[nightbasser]

Guys with some of the sho issues some have experienced I wanted to share some tips that I feel have enabled us to have great success with this engine so far. Number one thing that i feel is most important and this is debatable but we have broke all of our engines in on dino or conventional oil opposed to the synthetic "sho" oil. Also critical during break in is to build heat in this engine! Put the bow down and make her work. Do this at varying rpms levels and full throttle this loads the engine and builds more heat than ever possible running trim up down the lake. After running hard and getting the motor hot slow her down to a good cruise and cool her off then stop and fish awhile. Putting the engine through heat cycles will further aid the engine in seating the rings. We have followed these steps on all SHOs so far and have yet to post a single min of warranty work done. Being a longtime mercury guy with a couple of 300 black motors in the garage I must say i am very impressed with yamaha's effort in changing the game

[knopf]

I think you have the formula Junior. But if the SHO's are so finicky about break in, then Yamaha should break these motors in before selling them to the public. Then the ones that have issues making oil will not be released and the cost of oil changes will not be passed on to the customer. I did see one post by a Honda Tech that recommended "not to use synthetic oil" in their engines.

Scott

[nikldac]

Jr....Barry is referring to "his checkbook". Enjoy.

[nightbasser]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by knopf &raquo;</td></tr><tr><td class="quote">I think you have the formula Junior. But if the SHO's are so finicky about break in, then Yamaha should break these motors in before selling them to the public. Then the ones that have issues making oil will not be released and the cost of oil changes will not be passed on to the customer. I did see one post by a Honda Tech that recommended "not to use synthetic oil" in their engines.

Scott</td></tr></table> Scott we sold many of the johnson fourstrokes which where rebadged suzukis they had a big tag that said do use synthetic oil for the first 20 hours

[HondaRay]

The Honda Techs do not suggest synthetic oil during the first 100 hours...or during the seating of the rings.

[Unimog]

I used the dino oil during my first 3-4 hrs of break in and have had no issues either FWIW. Whenever I have a new engine, I run dino in them and change frequently so get initial wear metals out then switch over to a synthetic.