I have the above. I don't know where to go with the way it is running and am looking for some help. I have it on a 14' aluminum V hull, estimated with full load about 700 lbs or so. When the motor first starts, it planes the boat right away, runs great just like it should. After about 5-10 minutes, engine looses some RPMs and it looses power. Boat probably goes about half as fast as it did. Here is what I have done:
Rebuilt carb and fuel pump Oct 2011, carb cleaned again in March 2012
Brand new ignition coils on both cylinders
Brand new plugs on both cylinders
Compression on both cylinders is between 105 and 110 psi
New lower unit oil March 2012
Strong cooling water pumping
I have tried pumping the primer bulb when it looses RPMs but it has no effect on it. I am now at a loss as to what this may be. Please give me some other thoughts on where to go with this.
Rebuilt carb and fuel pump Oct 2011, carb cleaned again in March 2012
Brand new ignition coils on both cylinders
Brand new plugs on both cylinders
Compression on both cylinders is between 105 and 110 psi
New lower unit oil March 2012
Strong cooling water pumping
I have tried pumping the primer bulb when it looses RPMs but it has no effect on it. I am now at a loss as to what this may be. Please give me some other thoughts on where to go with this.