Mercury 25hp. carb issue?

Frank-T

Recruit
Joined
Nov 5, 2018
Messages
3
I have what I believe to be a 1983 25 HP 2 stroke outboard serial number 6378313. The motor will start sometimes but will idle rough and sometimes die while idling. If the motor starts and I put it iin gear with any amount of throttle it will run fine until it is returned back to idle. I am thinking that the issue is a flooding problem. One issue that I noticed is when I pump the bulb on the gas line alot of fuel is coming out out of the carb, I circled where the fuel is coming out when bulb is pressed. I took apart the carb and sprayed it down with cleaner reinstalled and seemed to be a better until the next time i went to run it(did not use any new parts). Any thoughts on the issue.
 

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Mohawkmtrs

Chief Petty Officer
Joined
Jan 13, 2010
Messages
560
It is flooding...that's the carb bowl vent. Time for a through carb cleaning and a carb kit, especially the float valve and seat.

Check float height/drop while it's apart.
 

Frank-T

Recruit
Joined
Nov 5, 2018
Messages
3
Thanks ordered a carb repair kit will install, clean and report back once it arrives
 
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