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JohnF2015
JohnF2015, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1083
Experience:  Owner/Service Technician at S & J Small Engines
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Y does my honda gx670 v twin engine surge while running

Customer Question

Y does my honda gx670 v twin engine surge while running
Submitted: 1 year ago.
Category: Small Engine
Expert:  JohnF2015 replied 1 year ago.

Hi, my name is***** will be assisting you.

Does the engine surge all the time? Only at idle? Only with no load? When replacing the carburetor did you do so with a new carburetor or just a different carburetor?

Customer: replied 1 year ago.
all the time and a different carberator
Expert:  JohnF2015 replied 1 year ago.

Was the different carburetor made for this machine? It may not have the same size jet in it which would cause a surge if the jet were smaller and not allowing enough fuel through.

Customer: replied 1 year ago.
it was made for this machine
Expert:  JohnF2015 replied 1 year ago.

The only reason that the engine would surge is a fuel restriction or bad fuel. Have you tried changing the fuel that you are running to see if it makes a difference? What happens if you manually hold the governor linkage steady with the engine running? Will it continue to run or does it die? Can you steady the rpm and remove the surge?

Expert:  JohnF2015 replied 1 year ago.

The only reason that the engine would surge is a fuel restriction or bad fuel. Have you tried changing the fuel that you are running to see if it makes a difference? What happens if you manually hold the governor linkage steady with the engine running? Will it continue to run or does it die? Can you steady the rpm and remove the surge?

Customer: replied 1 year ago.
new fuel did not work. holding the govenor it will die . disconnecting it it will also die. and no i canno5t steady it.
Expert:  JohnF2015 replied 1 year ago.

If the engine dies when you try to hold the governor linkage then it has to be a fuel restriction. You are not getting enough fuel through the carburetor jet or main nozzle to keep the engine running smoothly. Can you pull the choke closed slightly to smooth the engine performance?

Customer: replied 1 year ago.
it still surges
Expert:  JohnF2015 replied 1 year ago.

it still surges when? After doing what? Did you clean the main jet and fuel nozzle that is in the stem of the carburetor, the main jet screws up into the center of the stem that is sticking down when you remove the bowl.