Unleaded and leaded.
My understanding is that it is simply not an issue for these small engines.
There is no shortage of debate on fuel in these forums though.
Hi Jack,
Thanks for that. The reason I asked is because my 1980 Briggs ( or the user manual I have for it from that era) is quite specific that it doesn't require leaded fuel. A Nov 1976 factory service and repair manual I just bought says ULP will reduce deposits and actually extend engine life.
But the Kirby-Lausons are Aust built from earlier. May not have had access to hardened seats, valves? But certainly likely to run, maybe at worst valvesaver required. Just checking, to be sure. Have to get my hands on a manual!
I find the Briggs manual quite interesting. In the Governor section for example, roughly 1.5 paragraphs and one diagram is dedicated to the air vane governor, whilst 6.5 2-column pages and umpteen diagrams are dedicated to the mechanical governors.
And with half a million made, they've gotta be scattered around all over the place even now? Surely???
