[USN Mariah owner]

Spent an hour the other day doing some upkeep, changed the plugs and Cleaned the dist. cap contacts... Well worth the effort Boat Started and ran so much better. Last owner was not so keen on doing little things such as this

20$ Plugs
1 hour labor
One day at the lake with no problems "Priceless"

[mikeyt]

It does make a huge difference when they are properly maintained...

[wplaine]

I tried to get at my plugs but the socket wont go on... I am going to try again this winter. I have the 5.7L and the exhaust risers are in the way, any advice?