1998 ox66 250 won't start

[airframe]

I have a 1998 ox66 250 that will not start when its cold (first start of the day). I can spray some starting fluid in the intake and it will start right up and run fine after that. Once it is warm, it will start right back up again but if I let it sit and cool down again, it won't start without the starting fluid. HELP PLEASE. Where should I start looking?

[99yam40]

have you tried pumping the primer bulb before starting?

[airframe]

Yeah sorry forgot to add that. Balls are pumping up just fine.

[99yam40]

If primer pumps up firm then fuel is where it should be so maybe your compression is a problem or check to see if fuel electric pump is coming on and pressuring to spec
Compression, spark, timing, and fuel in the proper ratio is all that is needed

[airframe]

Ok I will check that. I have ordered the service manual so once hat comes in I will start to troubleshoot. Thanks.