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35hp Johnson need to pump bulb

I have a late 70s early 80s 35hp Johnson model---J35RLCRR that won't run unless I keep pumping the bulb. It Idles fine. I have switched the tank and hose with another motor I have and it still does it. Any thoughts?
Thanks,
Pipemaster17
 
I'm sorry, but I failed to say I already rebuilt the fuel pump. I'm pretty sure I did it right,and it never change the performance. Anymore ideas?
Thanks
 
You have eliminated tank and fuel line and if you are sure the pump is right that only leaves the carbs.
 
Doubt the carb has anything to do with the problem.
Take the quick connector off the fuel hose and put the hose straight on the pump.
Still same problem?
Bite the bullet and buy a new pump!
If problem solved, check line and connectors on engine.
Most of the pump kits do not contain the valves in the pumps, and they are often the ones to fail.
 
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