chajohns007
New member
Hopefully I can solve this before I go nuts.
History. Bought the boat, a 1980 from a guy who had it around 10 years and used it little. With unknown history he had reman long locks put in, from 318s to 360s. Per others at the marina the boat was seldom used after that. Transmissions serviced and Holley's on both engines.
Port engine runs smooth and will idle and rev fine under load. Starboard would at 1500 rpm, but pop out the carb over that, stall and run rough. Would always immediately re start though, but sometimes not run well under load.
New filters (2nd set) plugs distributor cap rotor wires and took it out no difference. Cleaned bowls and replaced float needles in carbs and it throttled up to a little over 2500) planed and cruised us halfway across erie.
Then it started acting like someone was moving the throttle up and down between 2500 and 1500 repeatedly. Eventually it would just go from 1500 Rpms to stopped. Immediately would re start and rev up in neutral. Then go into gear and run rough and at least limp at 1500 in gear.
Pulled into a fuel dock on both engines, starboard rough. Plugs on that engine really black. Cleaned them and adjusted idle screws in a bit for leaner mix. Helped for a while then again no wot and a backfire over 2000 rpm. Re start, rev and slow speed to a marina where she sits now.
Fuel pump? Or ignition coil. All the symptoms to me say fuel delivery, aside from the black plugs...? I'm stumped.
Help! Thanks
History. Bought the boat, a 1980 from a guy who had it around 10 years and used it little. With unknown history he had reman long locks put in, from 318s to 360s. Per others at the marina the boat was seldom used after that. Transmissions serviced and Holley's on both engines.
Port engine runs smooth and will idle and rev fine under load. Starboard would at 1500 rpm, but pop out the carb over that, stall and run rough. Would always immediately re start though, but sometimes not run well under load.
New filters (2nd set) plugs distributor cap rotor wires and took it out no difference. Cleaned bowls and replaced float needles in carbs and it throttled up to a little over 2500) planed and cruised us halfway across erie.
Then it started acting like someone was moving the throttle up and down between 2500 and 1500 repeatedly. Eventually it would just go from 1500 Rpms to stopped. Immediately would re start and rev up in neutral. Then go into gear and run rough and at least limp at 1500 in gear.
Pulled into a fuel dock on both engines, starboard rough. Plugs on that engine really black. Cleaned them and adjusted idle screws in a bit for leaner mix. Helped for a while then again no wot and a backfire over 2000 rpm. Re start, rev and slow speed to a marina where she sits now.
Fuel pump? Or ignition coil. All the symptoms to me say fuel delivery, aside from the black plugs...? I'm stumped.
Help! Thanks