1973 20 HP Merc fuel pump? problems

outboardnut

Petty Officer 1st Class
Joined
Oct 27, 2006
Messages
323
Hi All.
I have a 1973 20 HP Merc with the integral fuel pump that has me stumped. It's the "merccarb" with the style of fuel pump built into the carburator. Engines serial number is 3575088.
I bought a rebuild kit for it and it didnt' help. I'm not 100% everything is there and right.....my clymer manual is a little brief. The engine starts very easy, then idles for 20 seconds or so till it runs out of gas. If I keep pressure on the primer bulb it will idle all day.
Anyone have any tips?
 
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