Motor: 1988 Johnson 40 J40TELCCS
Question:
Once the flywheel is pulled what all should I go ahead and replace while I’m in there?
Reason/backstory:
2020 - Bought the boat and motor. Rebuilt fuel pump, carbs, new fuel line and bulb (not the gray line), water pump, etc. Ran great
2021 - noticed loss of power at beginning of season (4-5mph). Signs of bad powerhead adapter gasket with oily mess leaking down side of midsection and possibly water getting into a cylinder (bottom plug very clean). While on a trip the motor overheated and would die. Cool off and restart. Couldn’t get past 3300 rpm. Discovered the head gasket had failed and a chunk had broken off and blocked the water flow passages.
Replaced head gasket
New power pack and ignition coils and rectifier
Didnt get a chance to test after that work.
2022 - Same problem persists: can’t get over 3300rpm. Went ahead and rebuilt the carbs. Same issue. Tried a new power pack. Same issue. New plugs. Got good spark (jumps the 7/16” gap). So I’m thinking stator.
Just want to make sure I change out what needs changed out with the flywheel removed.
Thanks for the help.
Question:
Once the flywheel is pulled what all should I go ahead and replace while I’m in there?
Reason/backstory:
2020 - Bought the boat and motor. Rebuilt fuel pump, carbs, new fuel line and bulb (not the gray line), water pump, etc. Ran great
2021 - noticed loss of power at beginning of season (4-5mph). Signs of bad powerhead adapter gasket with oily mess leaking down side of midsection and possibly water getting into a cylinder (bottom plug very clean). While on a trip the motor overheated and would die. Cool off and restart. Couldn’t get past 3300 rpm. Discovered the head gasket had failed and a chunk had broken off and blocked the water flow passages.
Replaced head gasket
New power pack and ignition coils and rectifier
Didnt get a chance to test after that work.
2022 - Same problem persists: can’t get over 3300rpm. Went ahead and rebuilt the carbs. Same issue. Tried a new power pack. Same issue. New plugs. Got good spark (jumps the 7/16” gap). So I’m thinking stator.
Just want to make sure I change out what needs changed out with the flywheel removed.
Thanks for the help.