What is Normal RPMs running In Neutral and out of water with ears?

1985 Century Mustang

Chief Petty Officer
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Mar 9, 2023
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611
Does anyone know the normal RPMs for a Mercruiser 140hp Alpha One Gen One running on land with rabbit ears. I'm running at 975 and it seems to be running really nice. Is that too high?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
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50,608
I don't run a choke, my motor runs about 550 RPM cold (after running about 1000 RPM for a minute with some throttle), Bout 650 RPM warm.

That is on land or in the water
 
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