Post Number: 6
|Posted on Monday, May 15, 2006 - 03:55 pm: ||
My Palmer 60 runs great with no load and purrs like a kitten at 800 rpm. I am still having the problem of not being able to get over 1800 rpm when under load. Have tried most everything.
Compression checks out at 105 to 115 accross all cylinders.
Drained cleaned and replaced all fuel, oil and filters.
Electronic iginition installed (works great by the way).
New spark plug wires.
Cleaned the tube from the head to the manifold.
New water exhaust installed (this problem also existed when the old exhaust was in place).
Timing checks out at TDC and is about 17 degrees when reved without load to 1700rpm and higher.
When in gear away from the dock the highest RPM I can get is 1800. Tried rotating distributor when under way to get better perfomance but it seemed to like where I had set it at the dock the best.
It occurs to me that this has been a problem since I changed the oil in the transmission. Could an over fill of this oil or too heavy weight oil make a difference(I used the same 30 weight oil I used in the engine)?
Could it be the bottom was not cleaned properly and it is creating too much drag (she sails at hull speed in a decent wind)?
Any other ideas of what to check?
Post Number: 127
|Posted on Monday, May 15, 2006 - 04:32 pm: ||
How long since you've been into the carbuerator?
Post Number: 7
|Posted on Monday, May 15, 2006 - 07:31 pm: ||
Did a complete rebuild about three years ago.
Post Number: 122
|Posted on Tuesday, May 16, 2006 - 05:30 am: ||
I would look for trash in the main jet first, if it's running lean, choking it slightly should increase rpm. Next look for weak or broken valve springs. Also, open the throttle and see if the throttle plate is opening completely.
Howard E Taylor
|Posted on Tuesday, May 16, 2006 - 06:55 am: ||
It only takes a few barnicles on the prop to hold the RPM down, This is accompanied by a slower boat speed under power.