Vacuum advance port from distributor

86 Nautique 351 wrote: I'm still learning a lot about this great boat, this forum is very helpful, thanks guys. My 1986 2001 with 351 is bogging and not revving up. I just had the carb professionally rebuilt. Now diagnosis points to a timing issue. Saw this thread and noticed I have a vacuum port on my distributor that is hooked up to nothing.   Does this mean I have an automotive distributor? I am having trouble posting photos with my iPad or I would post a photo. Is this a good stock replacemert distributor in the link below? http://www.nautiqueparts.com/product/distributor-breakerless-mallory-left-hand-rotation-351-ford/ Any distributor recommendations? Thanks very much for everyone's advice and different points of view.

This is the same distributor you linked but for a right hand engine (if that's what you have):
https://www.nautiqueparts.com/product/distributor-breakerless-mallory-right-hand-reverse-rotation-351-ford-pcm-engines/

That's what I put in my 83 Ski Nautique with a 351 RH last year and it's been running great since. But as Keno pointed out, there are other options for RH engines. I personally wanted to go with DUI but for RH engines there was a 30 day backorder at the time. That may not be the case now. The first thing you need to do though is figure out what rotation you have.

I like the DUI, and yes sir, Hal is correct, a one month back order on the part from Summit Racing. One question, how does the DUI distributor eliminate the coil? Is there any special tuning or any parts required, or simply eliminate the hook up to the coil and remove the existing coil? I assume that wire that usually goes from the distributor to the coil is eliminated? Thanks to everyone for your prompt advice it has helped.