Plugs in a WD

[BobinKY]

I have converted my 48" WD to 12 volt and installed the Petronix HEI system. I also installed their flame-thrower coil. I put new V8 resistor plug wires on it and just recently had the old carb completely professionally rebuilt. It still runs like a Johnny popper and I cannot make any power. I emptied the bowl on the fuel filter and got a little water out of it, but no help. I have let this tractor sit and run at about half throttle for an hour yesterday and she did not try to clear up. I took the plugs out and sandblasted them, cleaned out all of the sand around the element and reinstalled. No help. I am gapped at about "40". The old girl is smoking just a little bit with white smoke.

Any suggestions for how to go through the engine to isolate the problem? What plugs would you recommend for this arrangement? She is not swapping fluids. HEEELLLLLLPPPPPPP!!!!!

 

[John (MO)]

I'd suggest you do a differential compression check to see just where each cylinder stands and where each one of them may be leaking at.

 

[Jerry Coulter]

Firing order is 1-2-4-3. Did you switch some plug wires? Most 4 banger engines used a 1-3-4-2 firing order.

 

[Aaron SEIA]

Unless the electric ignition specifies gap at "40", I think the plug gap sould be 23 or 26 thousandths. 40 seems way wide to me.
AaronSEIA

 

[Kip-Utah]

Get some new Autolite 303 or 295 plugs, gap them @ .032-.035 [no wider], and dump your resiter plug wires for the regular metal core [copper or stainless steel] wires. Make sure your valves are not adjusted too tight & double check your firing order.Kip