that exactly what happened , NOT SURE TIMING CHAIN JUMP.

WHAT IS THE REPAIR R IF TIMING CHAIN JUMPED...

pull the accesories off the front. pull the dampner. pull the timing chain cover. pull timing chain. reset cam to crank sprocket. re install everything.

You may have to take it out of the boat depending on the room in the boat.

Depends. If it didn't jump enough to cause the pistons to hit the valves, then you just need a new timing chain. Pretty simple. But, if they did hit the valves, then you would need new valves, and possibly some pistons.

hopefully no valves hit.. dont think so as it idles fine start write up just wont run while on load..

any idea why this would happen...

It's not a timing chain if it runs smooth. If it is a timing chain and your mechanical timing is off, you would have had no changes when you adjusted the timing.

It's electrical, or a balancer.

Or it is a really fu(ked up carburator.

just replaced carb new dominator..

Did it run fine after the carb? How long did you run it with the new carb?? Is it stock out of the box???

I still think it sounds timing related.

Let us know.

just replaced carb new dominator..

He says the timing was off 24 degrees. Can you elaborate more on this? Are you talking total timing? Is your advance locked out? What ignition systems are you running?

Im guessing you are saying that the total timing was off 24 degrees. If thats the case, you could have a bad module, centrifugal advance, etc.

I think what you are going to need to do is start with the basic steps.

Rotate your motor until #1 is at top dead center.

See where your timing mark on the balancer is relative to the timing tab on the timing cover. it should be close.

Pull the distributor cap, and make sure the rotor is pointing to the #1 plug wire on the cap.

If all that checks ok, start the engine, and set the base timing. Some balancers have a second notch or mark around 30 degrees. Be sure you are setting your base timing using the correct mark on the balancer. You may think your setting say 10 degrees, but really setting 40 degrees base timing if your on the wrong mark. You may not have this extra mark, if not, then disregard.

Once you get your base timing set, then you need to see if the module or centrifugal system is working. Depending on what module or springs you have, you will have to raise the rpm to say 3000+ and see if its advancing.





Not trying to be a dik, but please be more detailed on whats going on so some of us can try to help you. Your replies are kind of vague and tough to understand what you are getting at in your replies.