89 Mercury 200 BlackMax EFI

[mphinton]

Serial #OC164972

Doesn’t go over 2000 RPMs
Idle is perfect
4 out of 6 cylinders read 119, other 2 either read 0 or 90
Good amount of white smoke

Ideas? Suggestions? Recommendations?

 

[dirtslinger2]

Pull the head off that has the 2 low cylinders.

 

[Flying_Lavey]

Serial #OC164972

Doesn’t go over 2000 RPMs
Idle is perfect
4 out of 6 cylinders read 119, other 2 either read 0 or 90
Good amount of white smoke

Ideas? Suggestions? Recommendations?

These motors run totally different when there is a load on them. Idle and running it on a hose gives different results.

 

[HST4ME]

Motors with 0 and 90 don't idle perfect. First thing you do is pull the head off the one with 0 and see wtf.

 

[stingray11]

200 efi was the worst motor they built,they all do it. Find a new motor, 225 were better.