running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
(OP)
Hi there,
has someone experience in
running a two stroke enginge (yamaha scooter) with a fuel-alcohol blend? (85% unleaded fuel/15% Ethanol)
I think the lubrication could be a problem.
I also ask myself if the fuel lines can take it.
Thanks
hacki
has someone experience in
running a two stroke enginge (yamaha scooter) with a fuel-alcohol blend? (85% unleaded fuel/15% Ethanol)
I think the lubrication could be a problem.
I also ask myself if the fuel lines can take it.
Thanks
hacki





RE: running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
Reidh
RE: running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
My questions are:-
Why 15% ethanol when E10 is the common blend.
What are the fuel lines and anything else in direct contact with the fuel made of.
What is the fuel metering device and how can you corrct a:f for the different fuel.
Does your engine use a premixed fuel/oil or dos it inject oil into the crankcase.
Regards
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RE: running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
First the blend:
I don't know what went wrong in my head (I was totally wrong!), but the blend they sell here in germany is a mixture of 85% Ethanol and 15% unleaded fuel with 95 ocante.
- The fuel lines seem to be ECO or NBR (very cheap one layer hose) I thought it would be better to exdchange them against a FPM/ECO/ECO or THV/ECO/ECO hose.
- Well I didn't really think about the fuel metering device but I don't have a idea how to correct it. But thats a big point if I don't want to be lost dry on the road.
- The engine injects the oil into the crankcase
I hope you can use these informations to help me.
Thanks
hacki
RE: running two stroke enginge (yamaha scooter) with fuel-alcohol blend?
Petrol needs about 14:1 a:f ratio.
Ethanol needs about 9:1 a:f ratio, so you need bigger jets or injectors or nozzles, lines, tank, filters, fuel pump etc, depending on required range and how engine is equipped. By fuel metering device I meant carburettor or fuel injection.
Use oil designed for racing with methanol fuel.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: running two stroke enginge (yamaha scooter) with fuel-alcohol blend?