Powerhead Exchange Inc.

Break-in procedure for non-oil injected engines remanufactured by Powerhead Exchange Inc.

Entire 10 hours

 Fuel/oil ratio during entire break in procedure shall be  25:1 fuel/oil ratio inside the fuel tank. That's 5 ounces of oil for every gallon of gas. 1 Quart per 6 gallons. 1 gallon per 25 gallons.

Do not hold constant throttle setting when running engine above idle. Vary the engine RPM frequently.

Hours 1 Thru 5 Use throttle to accelerate boat onto plane, then reduce throttle to below 3500 RPM. Be sure that boat remains on plane at this setting.  If not, accelerate to maintain minimum plane. Do not plow through water. (change engine speed frequently 30-60 seconds).

Hours 6 Thru 9 Use throttle to accelerate boat onto plane, then reduce throttle to below 4500 RPM.  Be sure that boat remains on plane at this setting.  Do not plow through water. (change engine speed frequently 60 seconds).

Hours 10 Thru 12 Use throttle to accelerate boat onto plane, then reduce throttle to below 4800 RPM. Change engine speed every 1-2 minutes.

After 12 hours of break in, the object is to gradually and alternately work the RPM's up from a lower RPM to a higher RPM. This should be done in 100 RPM increments. Returning to a lower RPM each time. (Work up to 4800, then back to lower, 5000 then back to lower, etc. Do this until the maximum dealer recommended RPM is attained for your engine. Do not exceed the maximum dealer recommended RPM.

The cylinder heads must be re-torqued after break-in procedure is complete and while the ENGINE IS COOL.

Very Important rules to follow for the entire remaining life of your engine

If there is a drop in RPM while at a constant throttle setting, Idle or get pulled back in and diagnose the problem.

 If the cause is fuel starvation, it WILL cause major internal engine damage if a high RPM is maintained.

Varying the RPM is a good rule to follow for the longevity of your engine for years to come. It doesn't hurt the engine to get onto plane then off.  The objective is to give the engine a variance of wear positions within. (move around the hot spots).

Caution!!!

This break in procedure is only recommended for Powerheads remanufactured by Powerhead Exchange Inc.