I have a 1994 mariner magnum 3 serial number is od198941 my compression numbers are 105 to 110 is that still good .it still runs good but i was told thats low .its got me worried now thanks for any info
I have a 1994 mariner magnum 3 serial number is od198941 my compression numbers are 105 to 110 is that still good .it still runs good but i was told thats low .its got me worried now thanks for any info
A lot would depend on how the readings were done- and even if done right, I would check with a different gauge.
Compression Testing
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
ok thank you I will .what should the compression numbers be around
110-135 psi, max variance of 15 psi.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Ok thanks
well I had to look on here the correct way you done compression test. the last time I done it with out warming it up and so yesterday I done another one .it was 118 to 120 after I warmed it up so I am good then thanks for your help and have a good Christmas
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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