I have a 1989 mercury mariner 2 - 150 hp thats been sitting in garage since 1991 with maybe 30-50 hrs on it, motor looks brand new, when compression tested it red as follows,
from behind outboard all spark plugs removed, never been ran since 1991,
so outboard is cold
Left side top to bottom
#1- 130psi,
#3- 130psi,
#5- 120psi.
right side top to bottom(starboard)
#2 149psi,
#4- 130 psi,
#6- 120psi
Is this normal for outboard under conditions listed above, or do I have to have it overhauled,or possibly do the repairs neseccary to fire it up (clean carbs, new impellor, new fuel pump) and possibly compression will even out after running it.
The gentlemen doing compression said he was a mechanic, there was no key so he used a jumper switch hooked up to the silinoid, did not ground the spark plug wires, is that ok beings (no key)
Thanks M.
from behind outboard all spark plugs removed, never been ran since 1991,
so outboard is cold
Left side top to bottom
#1- 130psi,
#3- 130psi,
#5- 120psi.
right side top to bottom(starboard)
#2 149psi,
#4- 130 psi,
#6- 120psi
Is this normal for outboard under conditions listed above, or do I have to have it overhauled,or possibly do the repairs neseccary to fire it up (clean carbs, new impellor, new fuel pump) and possibly compression will even out after running it.
The gentlemen doing compression said he was a mechanic, there was no key so he used a jumper switch hooked up to the silinoid, did not ground the spark plug wires, is that ok beings (no key)
Thanks M.
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