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Old 03-24-2008 | 12:56 AM
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YUKONFLYR
 
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From: WHITEHORSE, YT, CANADA
Default RE: dave gierki engine break-in debate!!


ORIGINAL: springhillflyer

i will probably do that, follow the manual. like i said before i simply wanted to see what the guys on here thought. but if anyone could tell me if i should run my engine different for a while after its been totally disassembled for a cleaning it would be nice.
Springhillflyer -

After I have an engine torn down either for a very deep cleaning or replacing the bearings I run the engine on a test stand for one tank like a break in would be. I reduce the propeller load to about 70% of what a flying prop would be, I use extra lube ( I like castor ) and I run it rich ( two cycle operation at the verge of being 4 cycle with one more click of the HS needle richer ) at full throttle, I monitor the oil output from the exhaust. Looking for very clear clean oil and lots of it.

When a engine is torn down for a cleaning, you end up with a certian amount of dust, dirt or other particals that can not be seen with plane eyes. Even though it may look clean it is really not. Running it at a fast pace with lots of throughput gets the particals that you can not see out of the engine prior to any heavy loads being placed on the engine.

Richard