From the beginning.
Motor has always ran great with regular
maintenance. One day I say a large puff of black smoke and that is it. On next trip out I checked everything (oil
Coolant ext..) and everything was normal. during the day it ran away on me (was not to bad but took about 8 seconds to return to idle while throttle was cut), I shut down and inspected everything but found everything was normal. On my return to the
dock it ran away again with same outcome and
inspection results.
Next week I came to start working on it and found the
oil had come up and would pour out the dip stick hole.
Coolant had not done down at all so I figured it was
fuel.
Drained the
oil and checked for
water separation but found no separation of any type even after letting it sit overnight.
Removed and replaced the
fuel supply
pump, dismantled the old one just to see if the
diaphragm was damaged and found nothing. I removed the
injector pump and injectors and had them tested.
Pump checked out and was calibrated, injectors were replaced because one was stuck open and the other was only opening partially.
I put everything back together and it tested out at the
dock 100%. Even sounded better and ran smother than before. After 3 hours of testing between idle, high idle and in
gear up to 1500
rpm everything was looking great. No change in oil level.
Took her out for a run, 850
rpm - 2300 rpm everything was normal. From 2300 you get throttle lag. When you move the throttle about 3/4" with no reaction. Then RPM will start to climb as normal. At 2600 RPM the
exhaust water turns black. I collected some and it is full of suet particles. Not oily at all.
With no load the
engine will run up to 3000 RPM with correct throttle response and clear water.
Here is all I can figure, please confirm if you think I am correct.
When removing the
injector pump I did damage the 2 of the 3 shims. I could not easily get locally so I carefully flattened them and miked them to be .18 all the way around. 2 shims were .18 and 1 shim was .25. If I did not do this accurately and the damaged area was holding the pump up slightly then would this cause my problem? The pump is sending fuel a micro second late and when under a load the access fuel is being burnt. Where should I go now? Replace shims with new ones and/or look somewhere ells? Would this cause the throttle lag that never existed before?
Sorry for the long post but I appreciate any help you can offer.