model number looks wrong? are you sure about that one?
they usually start with S35xl or H35xl (for gas and lp trucks)
electric trucks usually start with like E35xl.
AND a truck serial number would be more helpful for more accurate information.
besides the above
check to see if you are getting spark at the plugs.
if not then you have an ignition/distributor problem.
verifying the fuel lockoff is only one step, the lp vaporizer/evaporator can also be a problem, plus check the diaphragm inside the mixer and make sure it is intact and not crudded up or damaged.
without the correct model and serial number it is going to be difficult to help you with accurate information.
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