hi
I have a 1990 90hp merc which starts fine and i have checked the timing which is ok. but when the engine revs around 3500 onwards it starts to misfire on all cylinders i know this by using the timing light to see if there is a charge sent to the plugs and at each of the plugs there is a...
hello i have
1990 mercury 90hp 3 cylinder
im having trouble starting, when i turn the ignition key all seems ok i.e
the timing is fine the spark plugs spark the compression is fine. sometimes as i release the ignition key the motor reves for half a second or so its really bugging me there is...
90hp 1990 mercy with low high speed rev in neutral i have the shop manual and just done a compression test on all 3 cylinders 130, 128,130 psi all good within tollerance rev max currently only 4500 correct should be 5500 ish wheres my problem?
hi
I have a mercury 1990 90hp 2 stroke the engine its my first outboard i believe the max rpm is 5500 mine will only reach 4200 it seems to idle fine
and ive had the compression check which is fine i was told the problem maybe electrical
if it is electrical what could be the problem...
