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Starting procedures and MAX RPM when starting

I was told by an IA that the most wear of our engines occur during initial startup due to lack of oil initially. He said that when starting, full throttle should not be used with the fuel pump on high but rather a “crack” so that the fuel flow maxes around 8GPH vs 29GPM. He said when full throttle is used, too much fuel is introduced causing RPMS tp shoot up to 1200 RPM. He said on start up you don’t want RPMS to go past idle. Ive tried this but can’t seem to get the engine to fully start as it only sputters and stalls. Since Ive owned the plane Ive started as the POH suggests and yes, the RPMs shoot up around 1100-1200 initially but as soon as it starts I immediacy pull back to 1000. I fly more than regularly with an average of 2 flights a week so I wonder if some residual oil is still providing some initial lubrication. Engine has about 200TT since factory new.

Has anyone heard this ? Anyone with higher time on their engines using the POH starting procedures ?

Thanks
John
A36 / IO-550R

Model: Bonanza A36
Aircraft Serial Number: A-2325
Posted 10/16/2021 - 1 month ago
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Throttle full forward for priming the engine for start. Then just crack it open for the actual start. The engine will only go the the RPM the throttle is set for and not the amount of fuel you primed with. It usually takes only a couple of twists in on the throttle from idle to get a good starting position.
Your IA was correct we do not want to start a cold engine and have it go to higher RPM's until it gets good oil pressure and warms up.

Bob Ripley
ABS Technical Advisor

Posted 10/17/2021 - 1 month ago
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Another suggestion to add to Bobs answer: Recall learning to fly without a vernier throttle control, and collapse the button with the palm of your hand; you get much faster throttle response pulling it back (if needed) than by twisting. With this add, I have no problem keeping them below 800 on initial start, often less.

Mike
ABS Tech Advisor

Posted 10/17/2021 - 1 month ago
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Starting procedures and MAX RPM when starting