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Re Built Yamaha 150 PRO V

mibowman

Member
Am in the break in process of

Am in the break in process of a re-built power head. Am told that 10 hours is enough break in time. I am using a 50 to 1 fuel mixture. I have been keeping the rpm at 4500 or below.

After the 10 hour period should I change fuel mix to different level for a period of time or is the injected oil enough at this point? How soon can I increase the rpm? Is there a maximum rpm? The new pistons are .50 over.

I appriciate the help and expert advice given here on this site.
 
"After 10 hrs you can run off

"After 10 hrs you can run off the oil injection. I believe that the oil pump is adjusted prior to the break in period to deliver more oil and then adjusted back after 10 hrs for normal operation. After the break-in period,run as normal."
 
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