SparkieBoat
Captain
- Joined
- Aug 17, 2009
- Messages
- 3,643
I have a 1994 J150ELERA. I have checked out everything I could think of. compression is 92-95 PSI on 5 cylinders with 99 PSI on cylinder #5 which has been bored .020 and has a new piston/rings. All other cylinders have new rings and bearings, All were honed and are within specs. There is no sign of water intrusion into any of the cylinders. All gaskets and seals are either new or in good shape. New upper and lower crank seals. motor turns over easily by hand with plugs out.
Timing has been checked and rechecked while running down the river. all linkage is properly adjusted and in good shape. All ignition components have been DVA tested and are within spec. All carbs have been cleaned and visually inspected while running down the river, they have a even spray pattern and seem to be working properly. intake manifold/carb/throttle body gaskets and seals all seem to be in good shape with no leaks.
Fuel tank/lines/filters have all been checked/cleaned/replaced. Fuel pump appears to be doing its job.
The engine cranks/idles and runs smoothly, no skipping/miss. It seems to have more power than the 115 I had on the same boat when you first start out, but after you pass 5/8- 3/4 throttle it seems to just not continue to accelerate like it should.
I had a 115 on this same boat (1999 60 degree Evinrude) last month. it ran out great, 40 MPH at 6K RPM with a 17 SS prop. With my new 150 I am now getting 37.5 with a 15 pitch aluminum prop @ 5200 RPM, and 39.5 with a 19 SS prop @ 4600 RPM.
I just do not even know what to check next, I had a 1995 150 GL motor about 2 years ago that did the exact same thing, I never did figure out the problem, sold it. I cannot believe I have another one with the same problem. Now I got to figure this thing out. Please help if you can think of something I have overlooked or missed.
Thanks Sparkie
Timing has been checked and rechecked while running down the river. all linkage is properly adjusted and in good shape. All ignition components have been DVA tested and are within spec. All carbs have been cleaned and visually inspected while running down the river, they have a even spray pattern and seem to be working properly. intake manifold/carb/throttle body gaskets and seals all seem to be in good shape with no leaks.
Fuel tank/lines/filters have all been checked/cleaned/replaced. Fuel pump appears to be doing its job.
The engine cranks/idles and runs smoothly, no skipping/miss. It seems to have more power than the 115 I had on the same boat when you first start out, but after you pass 5/8- 3/4 throttle it seems to just not continue to accelerate like it should.
I had a 115 on this same boat (1999 60 degree Evinrude) last month. it ran out great, 40 MPH at 6K RPM with a 17 SS prop. With my new 150 I am now getting 37.5 with a 15 pitch aluminum prop @ 5200 RPM, and 39.5 with a 19 SS prop @ 4600 RPM.
I just do not even know what to check next, I had a 1995 150 GL motor about 2 years ago that did the exact same thing, I never did figure out the problem, sold it. I cannot believe I have another one with the same problem. Now I got to figure this thing out. Please help if you can think of something I have overlooked or missed.
Thanks Sparkie