No start 1972 wombat

[Natelampa]

Ran a couple months ago then went to start it and nothing...
Good spark
Fuel to carb
150psi compression
No start... Any ideas?

[Hodaka250SL]

Spray a little gas down the carb and see if it will try to start. And if it does then something is wrong with the carb

[Natelampa]

Tried a little gas through spark plug hole and spraying carb cleaner down carb.
Still nothing, really weird.

[taber hodaka]

How does the plug look? try a new one -----Clarence

[Natelampa]

New plug, great spark when out of motor. It has all the essentials to run but for some reason not turning over

[matt glascock]

Does it feel like there is adequate compression when you kick it over? Is there a great big rat nest in the air box or air boot? What condition is the air filter in? Is your exhaust system completely obstructed? Is the gas old and tired out? You might consider pulling and giving the carb a formal cleaning paying particular attention to the pilot/starting circuit.

[Bullfrog]

Does the plug get wet after a round of start attempts or does it come out dry? Dry would tend to indicate that while there may be fuel TO the carb, there may not be fuel IN the carb - possible stuck closed float valve. Or possible clogged pilot jet. The pilot jet is the smallest jet in carb and the easiest to plug with grunge from a 45 year old steel tank. Got an inline fuel filter?

At about two bucks a plug, get a supply of plugs to assure you are working with "good plugs" for this tough "start up". When properly jetted, your plugs will run a looooonnnnnng time - but that is no reason to not have a handful of spare plugs around. (I just get a box of ten every now and then - its been a couple of years since the last purchase - so I've ALWAYS got good plugs.)
Ed