G'day Norm,
Hi Gadge, just curious as to if you have any idea what causes spitback/cough through the G3 carbs. I usually just swap the barrel over and fit a new set of rings and fit a modified G4/LM carb and then they are bullet proof. Haven't bothered too much with the G3 because parts are readily available for the G4/LM and there is millions of them out there
As others have said, this isn't in any way due to carby issues.
The G3 was a very reliable carby, with the only really failure-prone components being the plastic governor gears. Which were very easy to replace.
The only really 'head-scratching' fault I encountered with these, was a VC160 that just wouldn't reach the max governed revs range spec.
So I applied the 'full scientific elimination' process, and ended up replacing the main jet. Water in the fuel, while the mower sat idle over winter, had corroded the bore of the jet, so that it always ran rich!
