1999 Mercury 200 EFI what are good compression numbers. And no I do not have a serial number, looking to go look at a used rig and wandering what numbers I should be looking for and what numbers I don’t want to see.
1999 Mercury 200 EFI what are good compression numbers. And no I do not have a serial number, looking to go look at a used rig and wandering what numbers I should be looking for and what numbers I don’t want to see.
My 2002 200 says between 110-135, with no more than 15 psi difference between the highest and lowest tested cylinders.
Just tested mine today they ranged from 112 to 121.
Mercury 2002 200hp Carbed Saltwater
OT566776
2002 Cape Horn 22' Bay
Thank you sir!
+1
Make sure you follow the Compression Testing procedure precisely (see FAQ Section).
If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to provide the Required Info (serial number) when posting. Thanks!
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).
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