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#3 cylinder won’t stay running

Scott Leizman

Member
Messages
2
Reaction score
0
Points
10
Boat Make
Yamaha
Year
2004
Boat Model
LX
Boat Length
21
I have a 2004 LX210. I checked compression on all cylinders, rebuilt the #3 carb (didn’t replace needle and seat) and installed new plug wires. The number 3 cylinder on the port engine won’t stay running. It will only stay running for about 10 seconds and will stall out every time with any throttle at all. This is the cylinder that I rebuilt the carb. Before rebuilding that carb, it wouldn’t run at all. I tried adjusting the high and low speed screws while it was idling but it didn’t really do anything. Any ideas what to check next?
 

Cobra Jet Steering LLC

Jetboaters Admiral
Vendor
Messages
5,844
Reaction score
5,330
Points
452
Location
Florida
Boat Make
Yamaha
Year
2021
Boat Model
Other
Boat Length
Other
sounds like it is not getting enough fuel as soon as you apply the throttle it stops firing so I would see if a fuel line feeding the carb is blocked or the needle and seat have trash in them .
 
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