Has good compression,getting fuel,plenty of spark, wont start

Do not know where to begin. Does the engine have compression? Are the valves adjusted correctly? Is it getting fuel, fresh fuel? Is there a spare to the spark plug? Is voltage getting to the ignition system, all fuses ok?

It takes fuel, spark and compression to run. Check compression to verify within spec..

It's likely to be either spark or fuel.
Remove the spark plug and inspect it. There are pictures of good and bad plugs on line, the plug can tell you a lot about the fuel mixture and how well the motor is running.
Check that there is a spark jumping the plug gap when you turn the engine over (the plug body metal must be touching the engine metal to complete the spark circuit).
It's worth trying a new plug in case the old one has failed, even if the spark looks ok, sometimes a plug only fails when under pressure.
If there is no spark, check the ignition wiring (particularly connectors), kill switch, key switch, coil etc. You might have to get an expert to test these things for you.
If there is a good spark and a new plug makes no difference then it could be fuel. Easiest way to check is to get a can of Easy Start or similar and spray it into the air intake as you try to start, if it starts then look for a fuel problem.
Make sure there's enough fuel in the tank, the tap is on (try on reserve too), the hoses are not kinked or blocked.
If it's a blockage in the carburetor it's probably best get a mechanic to check/clean it.
Good luck.

test spark plug or replace w/good new gaped correctly. gas mixed correctly and in good condition. kill switch off ? key on? fuel **** on? if spark goo can use starting fluid in carb air intake. use sparingly !!! should fire with starting fluid. they dont like cold weather to well from my experiances. if you got good compression and good fuel and spark it will start w/start fluid just use very much at a time. plug fouled i bet.

Hey Marty,
An internal combustion engine requires three things to run..(if all the internals are good)..
1. A properly timed spark.
2. Adequate compression (>120psi).
3. Proper air/fuel mixture.

Start by eliminating one of these at a time...(get a professional to clean and set the carb), install a new spark plug. Get a new fuel line.

If you are only getting 65lbs of compression, remedying that would be my next move!! .. I have seen some run as low as 85lbs..run very poor too.. but never at 65lbs. You should let the engine turn over for about 5 seconds to get compression level.

If you've got decent compression, spark and fuel and it wont run - what about about air? Clean / new air filter installed? All 4 are needed to run.

spark, compression, fuel. check all those and get back to us.

ok 4 things could be the problem,
check to see if you have spark. if you have spark then spray some starting fluid into the carburetor or air box. if it does not start then check the compression, if the compression is good, and you have spark then check the camshaft. these have been known to eat the exhaust lobe of the camshaft right off. that is where i would start.

to get suction ( manifold vacuum )need to have the manifold blocked off by the throttle closed
how much is plenty ( 120-160psi)
if you have fuel into the manifold , compression and spark at tyhe right time , it has to go