Spark Plug Failure

[SkiDad]

Good 'Ol Frank always talked about keeping a spare set of plugs. So when I changed my plugs a few months ago i put the old ones in the glove box. Boat took off like crap today - i thought maybe a coil or pack but all the plugs felt warm - I was gonna go in, but I decided to swap them with my old ones and boat runs great again.

Saved our boating trip today!

gotta love the advice of the old generation!

 

[jerryjerry05]

I fish the ocean and never go out until: the battery's(2) are fully charged, the spare starter is there, the VHF is working and I have spare plugs.
​And a gallon of water in the storage(along with drinking water).

 

[Jiggz]

Yup, gapless plugs do tend to foul more than non-gapless due to its exposed surface. Hence the need for spare plugs on hand everytime.

 

[SkiDad]

one of the newer BUHW plugs died. When i got home i tested it on my multi-meter. I put the BUHX plugs back in that were 6 years old. I couldn't feel a ton of difference between the 2 plug types except the W's seemed quieter running than the X's - no idea why.

 

[pnwboat]

Deleted

 

[SkiDad]

Ok now that I've been back out in the boat since the spark plug incident I feel the BUHX idles much smoother. I guess NGK is telling me i need to stay with the BUHX. your results might vary - it could be my particular engine.

 

[pnwboat]

The BUHX plugs were designed to maximize the spark energy with the Prestolite ignition system.

You can use the wider gap BUHW plugs in the Prestolite ignition system as long as it has enough energy for the spark to arc across the wider gap.

 

[gm280]

Just remember, the spark can jump a wider gap out n the open then installed in the head. Because the fuel, gas and oil, is less conductive then the air. Gasoline does not conduct electricity even a little, I know I actually tested it. So when installed and surrounded by the fuel, it takes a much higher voltage to jump the gap. JMHO