Custom/Hybrid Have spark, Have fuel, pretty sure I have air, yet wont run?????

[Buckwild12]

Any Ideas? Gas isn't the freshest ever, Im trying to burn up some old stuff but it wont start on carb cleaner either? makes really no attempt to start. Motor has run fine this year, it ripped in fact, til now.

 

[Matt_E]

1. Timing is off.
2. Coil is going out (may seem to have spark that's okay, but not really that good) or plugs are bad.
3. Bad compression

I would do these things in this order:
Fresh plugs (thanks SkiDiggity!)
Check compression first because it's the easiest to do.
Then swap coils
Then worry about timing.

 

[SkiDiggity]

compression and new plugs is where we always started at the shop

 

[Buckwild12]

Ill check when I get home, TBD. Thanks for a starting point!

 

[Brian_216]

Woodrow Wilson may be sheared off, or its the coil. I lost a coil on my sled this winter, it was weird- same style coil and it ran on one cylinder. Only sparked on one side of the coil. Stranger things have happened! Start with easy stuff