I'm trying to find the total mechanical advance of my (partybarge )'87 bayliner 2450 with OMC 305 original single point ignition.

I'm only showing 6 degrees total. That seems too low.

Can anyone help me out?

You right. It's way too low. You should be around 16-20. I'm thinking the small blocks had 20 degrees.



Darrell.

Probably rusted together underneath the distributor, I had points it was under there, had a Sea Ray 240 SRV that did that to me. 12 degrees at idle and 12 degrees top end.

had the point plate out and everything was loose and was free to both ends of the stops also no rust

something screwy in the dist, if you twist the rotor how much does it move ? thats your advance in that dist.