What happen to my power?

[fiddlinfool77]

I was headed to the ramp after a good day of fishing. I was cruising smoothly 3/4 throttle at 46 mph. All the sudden I dropped to 39 mph and motor sounded different. I went ahead and opened to WOT but consent speed maintained at 39 mph. I can usually run 56-58 WOT. I stopped and tried to go again but boat would not plane out until my friend got on front deck. It didnt have full power It still only did 40 mph planed out WOT. Its boggy and I don't know whats up? Any suggestions? This happen all the sudden as it ran perfect all day until I headed in.

[21XDC]

Fouled plug is my first guess...

[fiddlinfool77]

ok. I probably need to replace plugs anyways. Would a clogged fuel filter be a possibility?

[21XDC]

Sure, But it normally don't do it all at once like a fouled plug. What motor?

[fiddlinfool77]

Its a 91 pro v 150 yammy

[fiddlinfool77]

So it turns out 3 of my 6 plugs were fouled. It had a ngk bp8hs in it but the motor has a sticker with b8hs on it. I put the b8hs back in it. Will this be ok?

[EL Skeeter]

Went to Boats.net this what your motor calls for:item #58- NGK-B8HS1-00-00 B8HS-10 - Plug Gap 1.0 mm/0.039 in.

[fiddlinfool77]

Thanks for the info skeeter!