DIY carb rebuild is possible ~ my member page has a carb rebuild photo album

RUST KUTTER is #1 on many YouTube videos

IDEA: drain the gas tank 'n use the gas in yard machines ~ fill tank with Non-Ethanol gas then if too expensive use Fuel Stabilizer & regular 87 octane gas

Safe bet is that every rubber part in the fuel system NEEDS replacement including all the carburator & fuel pump Diaphrams

Might try NGK double platinum spark plugs (NOT iridium)

If the cylinder head & gasket are good & good valve stem seals & if the compression tests sat THEN your little truck with it's low powered engine should last a good long long time

Have Fun & Good Luck