D318 not starting

does it smoke when you throw the fuel to it? could it be possible the
compression is stuck in the start mode and not switching to the run
mode?

These engines are notorious for having the rack stick when they have been out of service for some time. Take the side cover off the injection pump and check to see that the rack is moving in response to the throttle control. If the rack doesn't move you don't get adequate fuel delivery. Also check that the injection pump lifters are free and moving full stroke when you roll the engine over.

If need be the one injector can be removed and re-coupled to the fuel line to visually check spray delivery and pattern.

Hi D318 M,
as Om said take off the injection pump side plate and check that the injector line not recieving fuel has it's lifter/plunger stuck in the up position. By rolling the engine over and watching the lifters/plungers operate it will become obvious which lifters/plungers are stuck at the top of their strokes.
If this is so DO NOT lever the rack to and fro to loosen it as it can happen that the fuel pump plunger can be tight enough in the barrel to cause the quadrant gear connecting the plunger to the rack to turn on the plunger and cause that pumps calibration to be lost.
Simply very gently persuade, with a screw driver or similar, sometimes a gentle tap with a light hammer and punch is needed to get the lifter/plunger to fall, until after a couple of lifts and lowers it should become free and if no other lifters/plungers are sticking the rack should now be free to move back and forth.
Gently does it.
Cheers,
Eddie B.

also check to see if the pin fell out of the rack to governor thing. that happened last winter on the d6 9u known as ROLLER-LESS. we pulled and pulled to get him started and then he started when i pulled on the rack.

thansk
KoO
Published Author

I got her running, and I could rev her up, but she wouldnt shut off. I had to crack four injector lines to get her to stop.
When I pulled the ijection pump cover I found a rusty mess. The boat had sunk in New Jersy before I brought her home. I got the engine running shortly after raising the boat but I guess I failed to get all of the sea water out of the pump. All the aluminum lifters were stuck in the up position. I took a few hours of persuasion but there free.
Any suggestions on why I cant shut it down?

The governor has to go over a detent to the cutoff position. Possibly your throttle linkage is worn some (you did try it at the engine?) or the governor is equally corroded and the shutoff/low idle stop in the governor won't pivot over any more. To get to that specific part, take off the lever and remove the circular cover over the ratcheting mechanism that holds the throttle from moving. Then you can remove all the screws that hold the side on the governor housing. The idle stop mechanism is inside showing at about the 10:30 position in the opening with a spring hooked over it pulling down.

You may be able to go in the rear cover and free it up with a screwdriver. There is less to remove to go in it that way, but the access to the stop isn't as good.

oh just a small detail, "the boat sunk", LOL. got any pictures???

thansk
KoO
Published Author