No spark

[xboxrox]

Hello SIZZLESHANK

a) REMOVE ALL FOUR SPARK PLUGS & USE THUMB TO CHECK FOR COMPRESSION STROKE (YOUR THUMB WILL GET BLOWN OFF THE HOLE)
b) ENSURE THE BATTERY PASSES A LOAD TEST ~ FREE TESTING AT O'REILLY'S
c) O'REILLY'S RENTS COMPRESSION TESTERS FOR FREE ~ WITH PLUGS OUT, DO A COMPRESSION TEST (DRY THEN OILED CYLINDERS)

1) Use of a remote starter switch can help (with ignition key "ON" engaging the starter switch should produce a spark at the plugs
2) Determine #1 spark plug wire, look under the dist cap, note which terminal the rotor is pointing & mark the cap & spark plug wire #1
3) Attach a good spark plug onto the end of #1 wire ~ with key ON engage the remote switch & check for spark AT THAT PLUG
4) Verify spark plug wires are correctly installed on the distributor cap to coincide with the cylinder firing order
5) Test each spark plug wire with a good plug on the end
6) Check initial ignition timing, there is a tiny notch on the V belt pully closest to the engine, paint it white, use hands to rotate engine
7) With ignition switch ON & pully timing mark @ 7 to 10 degrees BTDC, rotate distributor left & right to observe a spark at #1 spark plug
8) If all good so far (good spark good compression good initial timing) then it might be a fuel problem
9) A 14mm tap & anti seize compound will cleanup aluminum head spark plug threads ~ NEVER remove or install spark plugs on a warm engine

Welcome to MR50 & good hunting finding the fix

[SIZZLESHANK]

Is the firing order for the mm and d50 the same?