Merc 200series 20hp fuel delivery issue

cjleger337

Recruit
Joined
Jan 31, 2012
Messages
4
Hi everyone. I did a quick forum search before I ask this question and none of the threads seem to be about the specific problem I am running into.

I have a 1978? (not sure on year, will look up serial number when I get off of work) 200 series 20hp blue tin wrap outboard. Took it out, started up and idled great, got out of the wake zone, accelerated, then it bogged out. I then noticed that when I started it up again if I pumped the bulb every once in a while it ran strong enough to get back to the dock.Once I tried starting it again, it would not start and acted like it was flooded out. List of things that I checked and replaced:

- arrow on primer bulb is pointing to the engine on fuel line.
- replaced fuel line connection at engine.
- tried various fuel lines (all new)
- hose clamps are at all hose ends on fuel line

I dont have a book on my engine, is there a recommended fuel line size that I need to make sure I am using? Appreciate any insight you guys may give.
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: Merc 200series 20hp fuel delivery issue

The engine needs a fuel pump kit, as it is on the side of the carb you might just as well clean it to.
 

quicktach

Petty Officer 1st Class
Joined
Aug 24, 2012
Messages
394
Re: Merc 200series 20hp fuel delivery issue

Sounds like fuel starving. Fuel filter cleaned? Carb cleaned ? Re-build fuel pump....
 

cjleger337

Recruit
Joined
Jan 31, 2012
Messages
4
Re: Merc 200series 20hp fuel delivery issue

Well the problem was resolved. There were two different carb options for these motors, along with two different fuel pump diaphragm set ups.
 
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