[johnyp]

Hi guys

Bought a picton 18ft with 80hp mercury. Keep it at bridlington belverdere. Been out twice now and both times after about 2-3 miles the middle cylinder packs in . Starts up no problems but acts up after its got warm. I have fitted new plugs but still doing it. When checking the new spark it is weak and intermittent. I suspect the coil. Grateful for any advice on what the problem could be and hot to fix it. :uhuh::uhuh:

 

[treeboa]

could be a weak coil thats breaking down when warm, years ago i had a similar problem with a twin, that was water getting into the problem cylinder, took months to pin the fault down

 

[SPECIAL'M']

I Had A Simular Prob On A 60hp Merc ,it Was A Bad Earth Dont Now If This Will Cure Your Prob. But Worth Haveing A Look At All The Electrical Conections/earthing Points On The Power Head Best Of Luck Mate.

 

[Nos4r2]

Have a look at the plug-it'll look cleaner than the rest if there's water getting in there.