greg prokopetz
New member
What should the compression be on a 2004 200 hp efi .
Thanks Greg
Thanks Greg
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2004 merc efi compression
- Thread starter greg prokopetz
- Start date
KearneyClunker
Member
110 - 115psi, some 120 and if the heads have been shaved 130 plus.
Key factor is that all holes are within 10psi of each other. If you have one cylinder that's low, it's going to fail. Make sure the engine is warm and that your meter is accurate.
Key factor is that all holes are within 10psi of each other. If you have one cylinder that's low, it's going to fail. Make sure the engine is warm and that your meter is accurate.
greg prokopetz
New member
Thanks for the info.
Checked compression when winterizing this fall just for my own curiosity and al cylinders look great
Checked compression when winterizing this fall just for my own curiosity and al cylinders look great