Erratic running

[Grilly]

My TB30r starts and runs awhile but coughs and misses and sometimes quits. It restarts easily. So far I have removed and cleaned the already clean fuel tank. Replaced the fuels lines, filter and added a shutoff, Also replaced the carb and ignition module. Cleaned the check valve on top of the fuel tank and cleaned the dust filter on the evap canister. I also loosened the fuel cap and tried blocking the deck safety switch in tighter but nothing changes. Any ideas here?

 

[slomo]

Also replaced the carb and ignition module

These both require testing. New doesn't mean new anymore.

Either lack of fuel or ignition is failing slash weak.

Air, fuel, spark at the right time and compression. Find out what you are lacking.

 

[Grilly]

These both require testing. New doesn't mean new anymore.

Either lack of fuel or ignition is failing slash weak.

Air, fuel, spark at the right time and compression. Find out what you are lacking.

Yes sir, new doesn't mean anything these days. I'll try to clean the original carb. Thanks for the input.

 

[Auto Doc's]

Don't overlook the spark plug.

Also, cheap aftermarket replacement carburetors are a crap shoot, so you may have to rebuild the original or try another one and don't go for the cheapest one you can find. Typically, Parts Tree and Jack's small engine has quality parts.

You will need all of your engine information from the product label or the number stamped into the valve cover to get a correct match.