ignition timing

[INCase]

Put LP heads on a gas tractor. Should I set the timng to the LP spec or the gas spec? Thanks.

 

[Jerry Coulter]

If not a dual fuel system, time to LP specs. Gap your plugs to LP spec, too.

 

[Jerry Coulter]

Wait!! Are you going to burn LP or gasoline? Use specs that match the fuel.

 

[Anonymous-0]

Since he is running LP head on a gas, and I am assuming he is running gas, would you not have to time it to some new spec. Should/might ping on gas with higher compression, if using LP spec. LP is higher octane rating is it not?

Retard timing if you hear it ping!

Roger in Iowa

 

[INCase]

Yes. LP heads running on gasoline not LP. Thanks for the help.

 

[Anonymous-0]

You are going to have to feel out the timing. Advance it until it pings accerating under full load and back it off a but until it never pings. That's as much advance as you can use. At part trottle it can handle more advance and needs it for economy but without a vacuum advance you have to set it at full throttle acceleration full load and take the poorer performance at part throttle.

Gerald J.

 

[Walt Davies]

I went from a multifuel head (4-1) to an LP head (8-1) on my case LA I run it at 30 degrees at full Advance with no trouble.
Walt