I will check that, thanks.

You set the points initially by gap. Get the timing and idle speed close to spec.
You'll need a dwell meter to set the points. About $25 at most auto parts stores. Hook it up as per instructions, then open the sliding door on the side of the distributor. There's an allen screw that sets the points gap and dwell. Tune it to specs. Now reset your timing, then your idle speed. Also check total timing if you've got a variable advance timing gun.
BTW, changing the dwell affects the timing so you have to set the dwell first.
BTW, I just pulled a completely corroded pickup and reluctor out of a 2 year old "hi performance" distributor this weekend. I wont say who the manufacturer was, but it rhymed with MSB. Makes points sound pretty good.
Gary

I don't remember ever seeing the old Delco points distributor with the window in a marine application, but in 21 years somebody could have changed it. I doubt if that automotive distributor was ever approved for marine use anyway, but I can be wrong about that too.

Do you have a Mallory or Prestolite distributor in that motor? You'll need to know to buy the correct points and condenser.

Not sure what distributor it is, they used both them in 86 stock? they look factory to me.

Take a picture of your distributor and I'll try to identify it for you.

I will not be at the boat until Friday night, I planned to get the points first, maybe I will buy for both if they have them and return the ones I don't use.

The Crane retro kit works very well for the old points type distributors. I have several friends with 80's model ski boats and have coverted 5 of them over to the Crane system. Easy start, no maintenance issues on all 5. The oldest one has been on the boat for 4 years.

Lust look up crane? any part numbers?

Should be a 3000-0226

may have to look into that over winter!