Search: Posts Made By: marbobj
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Replies: 18
Views: 5,483
Posted By marbobj

The fuel pump is pulse driven off the crankcase...

The fuel pump is pulse driven off the crankcase pressure which varies with the piston up/down. That pressure is flap checked in the fuel pump diaphragm.
Replies: 18
Views: 5,483
Posted By marbobj

Could be a weak fuel pump or partially plugged...

Could be a weak fuel pump or partially plugged filter. Did you put new carbs on it to test or just some used jobs off the shelf?
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