1987 3.0L Merc. Timing Specs.

[backacres]

Could anyone please confirm that I have the right timing specifications for a 1987 3.0L Mercruiser, Engine S/N 0B647030:<br /><br />6 deg. BTDC @ 650 - 700 RPM in gear, <br />28 - 34 deg. Dwell<br /><br />These are from Service Manual #10. I beleive I have the right one for this S/N, but have read some other posts where the specs were changed at a later date to 8 deg. BTDC.<br /><br />By the way, it looks like I have the Delco distributor (If that helps). Thanks in advance (no pun intended)!<br /><br />Jeff

 

[Laddies]

Re: 1987 3.0L Merc. Timing Specs.

If its a delco dist. and they didn't use the prestolite till much later that sounds right

 

[Don S]

Re: 1987 3.0L Merc. Timing Specs.

The Delco distributor was standard for your engine, but if the distributor was replaced in the early to mid 90's, then it could have a Prestolite distributor.<br /><br />Have a look at the first page of this Merc Service bulletin.<br /><br /> http://www.boatfix.com/merc/Bullet/95/95_11.pdf <br /><br />Here is what the Delco distributor looks like.<br />