My problem is the engine will idle,
but you can hear the rpm slow down for a minute or so. The rpm then goes to normal. Under acceleration the engine dies. It takes a couple minutes of pumping the accelerator for her to get started. The tank has been pulled and cleaned and it has a new fuel pump. Before I had this problem it was bogging out as I accelerated. Could this be a bad accelerator pump?

 

Could still be a fuel supply problem; lines to the pump especially. An air leak at a split, or something like that. The long crank times are due to the pump losing its prime, so fuel coasts back down to the tank level. Has the carb been rebuilt? If not that should be done, at least open it up and see what shape it's in. Your power valve could be bad, float level off, etc.

 

Could also be a vacuum leak......maybe needs a new carb base gasket.

 

Have your replaced the fuel lines? Some of the rusty nasties that grew in the tank migrated to the line and rearrange themselves allowing some gas to move through - but not enough to support acceleration or quick restarts.

How do I know this? 'Cause the problem you describe was mine last summer!

DW

 

Along with the advice you got above, it's possible the fine passages in the carb are already plugged and a simple carb kit won't solve that.

Also, make sure you use an modern inline filter - not just the sediment bowl - to avoid additional problems after you get it running.

 

Actually the fuel pump bowl gasket is a prime suspect, too. Mine dissolved in modern gas within a week. A leak there breaks the prime on the pump.

 

A way to test your accelerator pump would be to shut off the engine, then remove the airhorn. You should see the bowl full of fuel. Work the throttle cam. You should see fuel squirting out of the discharge nozzle, both sides.

This would NOT be part of your idling problem, though. This only kicks in when under acceleration.

As MTflat stated, there could be some idle passages plugged.

How does it run when going down the road, accelerating, etc?? Is it better or the same??

You can see the discharge nozzle in the picture.