Mercarb 2bbl on a 140 mericruiser

sc00ter18

Recruit
Joined
Jun 15, 2012
Messages
4
Got it rebuilt and supposedly tuned and ready to go from the seller. it is weirdly dripping - take a look at the youtube video please and tell me if this looks normal

 

jimbo_jwc

Ship Happens
Joined
Dec 19, 2010
Messages
633
Re: Mercarb 2bbl on a 140 mericruiser

Looks like accelerator pump is working ,quit pumping when not running its leaking around shaft from no vacuum from motor not running probably some wear in throttle body housing to bottom butterfly shaft or side thrust wear as round butterfly's center some carbs have felt shaft seal for this and have seen nylon washers to seal better . Mines at tarp shop or I could look as manual doesn't show any and when I rebuilt mine I didn't tear down that far .
 

lamphega

Petty Officer 2nd Class
Joined
Jan 11, 2003
Messages
147
Re: Mercarb 2bbl on a 140 mericruiser

My 2bbl Rochester did the same thing, apparently known for developing leak there at pump shaft. I had mine rebuilt and they fixed that also. I would speak with your re-builder. Like I said, known issue.
 
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