Colby
Member
- Joined
- Dec 23, 2012
- Messages
- 5
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Hello all, I am having some problems with a '98 50 hp Johnson. I'll describe the symptoms and let me know what you think. I've tried everything I can think of. We first got the boat about a year and a half ago. The previous owners said they had the carbs rebuilt and it does look like it. For the past year it has ran great. This summer it has declined more and more every time it's been out on the water. It would crank and run, but rough, WOT was great. Once it got started it would run long enough to get in gear and once it did it would run fine but then would die upon returning to idle. The other morning before hitting the water, I cranked it on the muffs and seemed to be doing fine, ran it for about 3 minutes and thought "it's good to go." Got to the ramp and in the water, hard to start. Again though, once it did start and get in gear, it was fine. Got to the fishing spot, fished a while, went to crank it up and finally got it cranked long enough to get in gear and back to the ramp. My question is, what are some possibilities that would make it run great at speed but not idle? I can't even get it to start up for more than 3 seconds now.
Things I have tried:
adjusting linkages (seemed to help but not long)
checked all fuel lines and everything seemed great, bulb holds pressure nice and firm, fuel pump is working as normal
The red schrader valve on the electric choke primer does have two cracks in it that fuel would leak out of when choking, I can blow air through the cracks so I'm thinking maybe it could have been sucking air in from there? have a new one on the way.
spark plugs are getting spark
it is getting fuel (spark plugs have fuel on them)
gas is fresh, oil mix is right
All electrical is in good shape, no broken/melted/cracked wires, all connections are good, etc.
Any help is appreciated.
Don't want to take it to a shop because I don't want to wait weeks to get my boat back and summer be over; but looks like i may have to
Things I have tried:
adjusting linkages (seemed to help but not long)
checked all fuel lines and everything seemed great, bulb holds pressure nice and firm, fuel pump is working as normal
The red schrader valve on the electric choke primer does have two cracks in it that fuel would leak out of when choking, I can blow air through the cracks so I'm thinking maybe it could have been sucking air in from there? have a new one on the way.
spark plugs are getting spark
it is getting fuel (spark plugs have fuel on them)
gas is fresh, oil mix is right
All electrical is in good shape, no broken/melted/cracked wires, all connections are good, etc.
Any help is appreciated.
Don't want to take it to a shop because I don't want to wait weeks to get my boat back and summer be over; but looks like i may have to