00' 3.0L Mercruiser Timing

[anorthite]

I'm trying to set the timing on my 3.0 mercrusier and I'm having difficulties.

The carb cover says 1 degree ATDC, and idle 600-700. So I set the timing and adjusted the idle speed to 700. Now it seems like it's running too rich and diesels after shutting it off after running. My WOT rpm's are also down to 4200. The idle screw is 3 1/2 turns out.

Before I started messing with it the timing was set at 12 degrees ATDC and the engine sounded like it was coming apart and knocking at WOT with rpm's at 4900. With idle screw out 1 1/2 turns it was idleing at 800 rpm's.

Should I try a different timing setting, or should I look at reproping now to get the rpm's correct.

I'm just not sure about the obvious fuel smell and diesling when I turn it off after a 5+ min run across the water.

Thanks

 

[tommays]

Re: 00' 3.0L Mercruiser Timing

You should havd a Delco EST system which starts on page 4B-21
http://www.boatfix.com/merc/Servmanl/13/13B4R2.PDF

It has to be locked into a base timeing mode to be set and then checked for the correct full advance


The 3.0 motor is fussy about timeing and will bow head gaskets if you do not set it correctly

There is a service bulletin about it BUT i do not know what one

Tommays

 

[Don S]

Re: 00' 3.0L Mercruiser Timing

That manual is the wrong one for his 2000 engine.

Us real marine mechanics would be shot for makeing a mistake like that.,

 

[tommays]

Re: 00' 3.0L Mercruiser Timing

I am sorry it is general manual that goes over the base timeing setup

You would have to get any service bulletins and a serial # to get the exact manual and any changes in the timeing that may have been misprinted on the flame arrestor sticker

Please do not shoot me

Tommays

 

[anorthite]

Re: 00' 3.0L Mercruiser Timing

Thanks

I'll try and track down the right numbers using that info.