Engines: 1984 350 HP, 454 long blocks with 1800 hours.
Single tank, no valve or metal screen filters on tank. Water separator for each engine. Fuel flow indicators before water separators. Fuel lines replaced and are in great shape.
Problem(s):
Port engine: Starts and runs fine but it won't go above 2200/2399 RPM's, it 'bogs' down when you try to accelerate, the RPM's will fall back and then it can come back up to 2200/2300.
Stbd. engine: Starts and runs fine but at 2800 RPM's it will backfire, intermittently enough that it can't be run any higher than 2800 RPM's.
Been through a couple hundred gallons of fuel this season.
Removed and cleaned both carbs (and filter on carb) first, carbs were pretty gunked up but the exact problem was found. Then I replaced water / fuel separator and fuel filter on both engines, same exact problem.
Lots of advice from fellow dock mates now thinking that it might have to do with timing/distributor.
Searched the forum but couldn't find anything close, anyone been through this before or have any advice? If I left any details out that might be needed, please let me know.
Thanks in advance for everyone's help.
Single tank, no valve or metal screen filters on tank. Water separator for each engine. Fuel flow indicators before water separators. Fuel lines replaced and are in great shape.
Problem(s):
Port engine: Starts and runs fine but it won't go above 2200/2399 RPM's, it 'bogs' down when you try to accelerate, the RPM's will fall back and then it can come back up to 2200/2300.
Stbd. engine: Starts and runs fine but at 2800 RPM's it will backfire, intermittently enough that it can't be run any higher than 2800 RPM's.
Been through a couple hundred gallons of fuel this season.
Removed and cleaned both carbs (and filter on carb) first, carbs were pretty gunked up but the exact problem was found. Then I replaced water / fuel separator and fuel filter on both engines, same exact problem.
Lots of advice from fellow dock mates now thinking that it might have to do with timing/distributor.
Searched the forum but couldn't find anything close, anyone been through this before or have any advice? If I left any details out that might be needed, please let me know.
Thanks in advance for everyone's help.