Try also the following:
1) Re-check all engine needle valve settings. Most engines come fairly well set up but occasionally you may experience a rogue and if the carb isn't set correctly it will never fire. There is likely to be 3 settings to try - the main needle, the low speed needle and the idle screw. Check the instructions for what the 'correct' setting for all of these should be.
2) Assuming that the carb is set up correctly, quite often priming the system won't give enough fuel to sustain a fire with a new pull start engine. Do as 3975Dave suggests and back off the plug to ease the compression but first, you may also try to drip 3-4 drops of fuel directly into the combustion chamber by removing the plug first. Be very careful not to flood the engine but this, in addition to a primed system has never failed me yet.
3) Give the plug a few seconds on the glow starter before attempting the pull. Once it does fire, keep the starter on it for upto 30seconds whilst the engine warms through.
You will need to run the engine in before it will rev cleanly and run properly. Some engines seem prone to blowing plugs during this process as quite often there is minute particles of metal swarf that ends up damaging the plug element. Never ever run it without the air filter. Sorry if this sounds if I'm preaching - but I've learnt the hard way ;-)
It will work but they can be very frustrating.
As for a siezed engine at TDC - I've only experienced that once and the only way I found to feel it up was by removing the engine from the chassis and gripping the flywheel in some grips / vice and turning the engine very carefully.
New engines are tight - some are worse than others but once run in, they'll be fine. Just make sure you take your time with the running in process - you'll do more harm than good if you try to rush this - it is the most vital aspect of defining the engine's life (other than running it without an air filter!!)
Good luck.
|