Runs til gas gone in carb and quits

[tpls63]

I have a 1995 20 HP Merc outboard tiller, pull start.
I have new fuel line and bulb and line is clean to carb. Carb freshly rebuilt.
Engine starts good after priming but only runs a short time and then dies. I re-prime and it'll do the same thing again and again.
What should I be looking for?
Thank you!

 

[GA_Boater]

Probably time to rebuild the fuel pump. Remove the pump output hose to the carb and see if it spurts gas while pulling the rope.. Try to catch the gas, but most likely there won't be any.

 

[hardwater fisherman]

Probably time to rebuild the fuel pump. Remove the pump output hose to the carb and see if it spurts gas while pulling the rope.. Try to catch the gas, but most likely there won't be any.

I believe the fuel pump is part of the carb on that motor.. And no outlet hose..

 

[Sea Rider]

I believe the fuel pump is part of the carb on that motor.. And no outlet hose..

If so, check the internal pump's diaphragm for wear, probably dried, cracked, ballooned ?

Happy Boating

 

[GA_Boater]

I believe the fuel pump is part of the carb on that motor.. And no outlet hose..

A while after I posted about the pump, I thought about that.

Then I figured the OP would say something.

 

[Faztbullet]

I have had DIYers install mounting gasket wrong so pulse hole doesn't drive fuel pump....check gasket.

 

[tpls63]

Ok thank you all. I’ll pull the carb apart and check the gaskets and let you know later today.

 

[tpls63]

Faztbullet That was exactly the problem. The kit came with several gaskets and I grabbed the one closest to the old one and didn't notice the hole in the gasket didn't match the hole in the block. It's running good again.
Thanks again for the help all!

 

[Faztbullet]

Anytime....