new plugs and wires

Hey guys

when I get my boat opened up and cleaned for the spring/summer, I want to go ahead and replace the spark plugs and plug wires this year. I don't know the age/condition of the current ones, as they were in it when I bought it. I've changed everything else now, so I want to just do the plugs and wires now, so I know the age/condition.

What plugs and wires do you suggest for my 1993 S.N. 351W engine.

Thanks

Plug wires id go with cut to fit universal. I believe moroso makes some? Or maybe accel?

You might want to read this old thread and see what really comes in those PCM spark plug packages.

The numbers in the thread may be different but the theme's the same.

You can buy the WL24 White Lake part number and you'll end up with Autolite 24's.

Maybe you'll feel really good that you bought Autolite plugs packaged as PCM parts at a highly inflated price or maybe you won't.

old thread

Well, I was confused as what to get, so I just called N.P. and gave them my engines serial number, etc. Told them it didn't have the ProTec, etc. They said my engine was the 351w H.O. and I should get the WL764 plugs.

I'm feeling a strong sense of Deja Vu ... Have we been here before??

       

Good morning Dan, good to have the ol' site back!   

Glad to see you've got the correct plugs, but the correct plug gap for all 351's is .045".   It would be good to download an owners manual and perhaps a service manual from the reference section ( tabs, above right )   They don't have every year or model, but you can probably get one that is close enough. Those will have all the vital specs for you like plugs & wires, fluids types & grades, etc.

Cap & rotor should be inspected for cracks or obvious wear at the contacts. Other than that, just clean them well and reinstall   

Must be a year specific thing?   My manual for the 95' specifically states .045 for all 3 versions - 260hp, 285hp and the GT40.

Thought I'd double check my manual to make sure I had the correct one.   The 95' owners manual from the reference section on the site has a copy of the PCM manual attached toward the bottom - this is where I've been getting most of my info for my engine specs. Funny, in fine (and fuzzy) print at the bottom is has a printing date of 1997.   Guess that manual isn't for my 95' after all. After this posting issue, it makes me wonder if any of the specs changed between 95 and 97 .....

So what did you figure out Joe?

Maybe that your engine is .045' like you said and all the PCM's with electronic ignition standard had the same .045".

And then all those piles of breaker point 351's from PCM thru the years had a gap of .035".

Flyweed has a Reverse rotation 351 HO 285 HP with a distributor and carburetor.

I'd imagine he knows what the ignition system is and should be able to decide his gap from there.

Whatever manual he's looking at, it told him the right plugs and gave him a gap of .035'

Edit since Flyweed posted while I was typing this, it looks like his takes a gap of .035

KENO wrote: So what did you figure out Joe? Maybe that your engine is .045' like you said and all the PCM's with electronic ignition standard had the same .045".

95' owners manual from CCF reference section, page 97:



He says Nautique parts told him he had the HO, but it is not the ProTech so I would assume it is the 285hp carb version.   I guess my mistake was thinking the timing, plugs, plug gap and so forth wouldn't change from year to year, given the engine was basically the same configuration in 95'.   However, if you pull up this manual - from this site - you'll see that the ENGINE manual that is attached to the bottom of the 1995 PDF owners manual is not from 1995, it was printed in 1997. Perhaps in 97 they changed a few of these details or like you pointed out, they may have been using a different distributor/ ignition system by then.

Anyway, sounds like he's got the correct stuff and has it set correctly for his engine.   

I'm here to help where I can Pete.       Though usually it's me that needs the help

Well, I'm the last of 6 kids Ken    
The oldest two were 16 and 19 years older, then 9 and 12 years older - sort of used to it