kghost
Silver Medal Contributor
Its not that i don't completely understand. I get it. If my sticker is incorrectly placed my timing will be incorrectly set. If my timing doesn't advance my ecm could be pooched. If there is something wrong with my knock sensor or tps, it could be throwing my engine into a safe mode or something. But long story short everything we transferred from my old engine worked before at WOT and should be working now. My fuel pump is new and was replaced when i was having issues with my first engine, the marine shop did zero trouble shooting and replaced my entire fuel system when the real culprit was zero compression on 2 cylinders. So the pump thats on my engine even tho is new.....its still untested and it sat for 2 years which is why we just want to try this fuel test out. I would run a gauge but i do not have a guage to see if the pump is producing the correct psi. I Already spent 7000 dollars in parts or unwanted and useless labour in the repair of this boat, and im done trying to spend any more money than i have to now on test guages or anything else for that matter.
But I get that my timing could be the main culprit......but we just want to try to throw some fuel down the throttle body........just to see what that does. If it does nothing, we'll run a light while giving it throttle to see if my timing is advancing. I get the basics of everything here to find out how to find the answers i need and i thank you guys for that! But it gets to a point to where youre sending me graphs and attempting to make me understand very techinal things i don't have the knowledge for.......and it is falling on deaf ears. But i appreciate your help none the less, the more information i can get is only going to help me more. I tip my hat to everyone who took that time to help me with this issue so far! Im hoping to have some kind of concrete asnwer to what is happening thursday night once we try again. I will keep you all posted.
THERE ARE only a few possible reasons for not reaching wide open throttle under load.
process of elimination and don't rule anything out such as things you may already think are ok, double check everything. Missing ground, loose connection, partial connection........bad connection.......
bad coupler (outdrive drive shaft goes into it)
Bad prop hub
loss or lack of fuel
no timing advance
too much fuel (over rich) but you should see excess black smoke out the exhaust
Other possibilities would be lots of growth on bottom of boat
over weighted boat
something in water path causing cavitation at outdrive
Tachometer may be interfering with ignition...
Bad internal motor issue such as valve issues etc.
So start somewhere see what result you get, then either move to another possibility or come back and post results and ask more questions.