1986 Merc 90 HP timing question.

[RobinR]

I have a 1986 Merc 90 outboard that I am tring to set the timing on. My question is, there are only etched degree lines on the fly wheel but no other indication of with direction from the zero is ATDC/BTDC. My assumption is that left of the zero would be BTDC and right would be ATDC but I would like to be sure. Also how would this relate to advanced vs. retarded. Thanks in advance.

 

[kev_79]

Re: 1986 Merc 90 HP timing question.

If you engine rotates clockwise, left would be BTDC witch is refered to as haveing the timing advanced. ATDC would be to the right, and retarded timing. If you want to know more detail, just ask. Good Luck

 

[RobinR]

Re: 1986 Merc 90 HP timing question.

Thanks Kev_79,<br />I figured that was the case, but for some reason I was throwing the pointer into the equation and it was confusing the hell out of me.

 

[kev_79]

Re: 1986 Merc 90 HP timing question.

we all get a little confused after running around with that little blinking light for a while, especially if the motor isn't running well in the first place. Good Luck