Re: Best way to break in a rebiult motor

Posted by RN on November 27, 2004 at 18:41:22 from (166.126.218.219):

In Reply to: Best way to break in a rebiult motor posted by Bill from Seneca, IL on November 27, 2004 at 18:06:38:

Breakin rebuilt? Lots of ways, here is opinion for your Cub this time of year- 10W valvoline racing oil in engine, 1 cup 30w non detergent low ash oil to 5 gallons gas for start. 1st 2/5 hours running don't get over 2/3 throttle. vary speed up/down while under light load- wagon pulling or something like light cultivating garden. Next 5 hours can go to full trottle medium load. Garden plow/cultivate/mow in low gear short rows - vary engine speed end rows and turns. Drain oil at about 10 Hours, switch to 10w30 weight, change filter, reduce oil in gas to 1 cup to 10 gallons. Go next 25 hours up to near full throttle and medium loads while varying engine speed occasionaly- slow to idle on corners, end rows, whatever/whenever you feel like it. Drain oil at 20-25 hours and run 10w30 for winter, 15/40 or straight 30 for summer. Try to change oil at least twice a year or 100 hours afterwards, no more oil in gas needed. Rings should seat in 1st 5-10 hours, valves should work lap themselves to seats and guides and bearings fit themselves to journals at same 5-10 hours. Second 5 hours under some load should have engine at full operation temp. At 1st oil change 10 hours, check head bolt torque/retorque to specs, check intake/exhaust bolts also, check valve lash clearance. RN.

Follow Ups:

• Re: Best way to break in a rebiult motor JD790 19:14:10 11/27/04 (3)
  • Re: Best way to break in a rebiult motor RN 20:05:44 11/27/04 (0)
  • Re: Best way to break in a rebiult motor RN 19:51:05 11/27/04 (1)
    • Re: Best way to break in a rebiult motor JD790 21:27:26 11/27/04 (0)

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