Haven't finished this MTD mower yet , just thought I would show people how easy the Honda starts and runs on LPG when adapting an old motorbike carby to run straight LP gas.
Disadvantages of LPG. It produces 10% less power, compared to petrol, on the same engine. Its Ignition temperature is higher than that of petrol, it leads to 5% less lifetime of valves.
Have a pile on Honda motors here ,If I don't use the Honda .motor it's just scrap metal.
Hi Norm, correct and I could leave the mower in a shed for ten years and then it would still start up no problem with old LPG.
Not much chance of getting water in the carby or tank and no way to get a fuel blockage also no fuel evaporation .
The Honda runs smoother on LPG .
LPG vapour takes up to 30% more area in the manifold and carby than petrol which is still in a liquid state that's why I installed a larger carby than standard so I shouldn't have lost any noticeable power.
Yes Ebay have had them for years Tyler ,only thing is the converter being under the carby means it will fit a generator / water pump but probably won't fit on a mower without modifications.
You can buy a LPG carby from LEHR that's lpg only.
The only problem with my mower is I have no governor so I just adjust the throttle with the rpm at 3300 and cut the grass but if the grass if really high the rpm drops a fair amount ,I was thinking of going to 8 hp or just fitting a SU type of carby with a vacuum controlled slide .I guess it wouldn't be too difficult to make a vacuum controlled fuel enrichment system so when vacuum drops a little extra lpg will supply the engine.
