I have a 1987 MCM 205, 262 cid, I just got the boat last fall. Put it in the water ran GREAT for about 20 min then sputtered and died. Took it home 2 hrs later fired right up. Now this spring it starts hard first time, but after that starts right up and idles good but if you try to idle it up seems to run rough and boggs down. It will come back to a good idle then aft a few min acts like it wants to and will die. I have replaced the fuel pump & filters, new spark plugs, rebuilt the carb seems to be getting plenty of fuel. I am now looking at poss dist sensor, coil or ign amplifier which costs a cool $550.00. Any thoughts out there, Thanks
4.3 v6 engine, thunderbolt IV ign
4.3 v6 engine, thunderbolt IV ign