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Merc Cruzer · 05-23-2021, 06:51 PM

You are at 4,692 altitude (I am at 8,300 ft so there is definite a reduction in vacuum). Your vacuum will be lower, but not 5-6 inches. But that having been said, you might want to have a vacuum gauge on the engine and then adjust the distributor, while the engine is running, to see if the vacuum increases.

05-23-2021, 06:51 PM	#5
Merc Cruzer Senior Member Join Date: Jul 2010 Location: Conifer, Colorado Posts: 2,429	Re: Low power, low vacum You are at 4,692 altitude (I am at 8,300 ft so there is definite a reduction in vacuum). Your vacuum will be lower, but not 5-6 inches. But that having been said, you might want to have a vacuum gauge on the engine and then adjust the distributor, while the engine is running, to see if the vacuum increases.