New Plugs... WOW
 

My boat had 168 hours on it when i bought it a few month back.

of those hours, 76 where at idle. Boat ran good, but the throttle where always a little off. No big deal.

Then I noticed the more use to the boat I got, the more it started getting rougher when getting on plane, then it cleaned up? we are talking VERY little roughness but enough I noticed it.

After some research on here, I was told 496's are very rich at idle, and can be hard on plugs.

Put a new set of plugs AC Delco Platinum, gaped at .60.. and WOW

the boat was SO much more responsive when hitting the throttles, and they care now even when working them...

crazy spending 120 bucks for spark plugs, but well worth the 1.5 hours it took to install them.

Great to hear Mittens. How have You been. Artie

Been good man, how about your self?

Glad to hear you got good results.

I just replaced mine over the weekend on my 525EFI. I used the stock NGK's and didn't notice much. It sounds better though. I was hoping for that elusive extra 5MPH. :)

I did the same thing, thought it was just me!!
Changed my ACMR43T's for NGK's and noticed a BIG difference, idle quality, starting and response where all much better

Were hanging in there My friend. Moms not doing well right now. Chemo's not working. An I cracked My leg 3 weeks ago. Rochelle My 35 year old room mate will be having rush surgery tomorrow. 10 syst on Her Ovaries. Hey it's tough getting old. I'm keeping My head up an looking forward to things getting better. Artie :whistle:

This is a good reminder I should change mine, mine behaves as you described........