1991 50 horse Merc, no "power"

R

rparks73

Recruit
Joined
May 1, 2011
Messages
2
I have a 1991 50 horse Merc outboard. Electric start and steering column. I have just had the water pump, thermostat replaced. I took the boat out today and it idles and purrs great however, when pushing the throttle all the way down, it sounds like it is not reaching full RPM. I was only able to get up to about 13 mph. Any suggestions before I take it to the shop?
 
M

Maxz695

Guest
Re: 1991 50 horse Merc, no "power"

get the test for the stator on your engine and see if it,s up to par
 
Faztbullet

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,938
Re: 1991 50 horse Merc, no "power"

Was it running ok before repair? If so check to see if maybe a plug wire got knocked off. This should be the 3 cylinder model and it will idle fine on 2 cylinders. If it has set for quite a while do a basic check of the fuel, spark and compression.
 
R

rparks73

Recruit
Joined
May 1, 2011
Messages
2
Re: 1991 50 horse Merc, no "power"

Faztbullet said:
Was it running ok before repair? If so check to see if maybe a plug wire got knocked off. This should be the 3 cylinder model and it will idle fine on 2 cylinders. If it has set for quite a while do a basic check of the fuel, spark and compression.
Click to expand...


It was/ is running great after I took it in to have the water pump replaced (grand father had it stuck on a mud bar a year ago) and thermostat replaced. It runs smooth, no sputtering, smoke, or rainbows behind the motor and can push the 16' starcraft nice. It just seems like it should be running at a higher RPM with more speed.

I had the Mercury dealer go through the motor and do a check on the whole thing because it did sit for a year. Prior to me getting it and having it worked on, it was worse. The boat would not even plane out even with the trim.
 
You must log in or register to reply here.
Top