thor 45cc
 

please help iv got a thor 45cc motor a its new but set for a long time i put it on my biplane with a 22/10 prop and its hard to start and runs ruff,put a new ngk plug in it ,still wont run right thank any help will do please email me at [email protected] :confused:

It probably needs the carburetor cleaned out and gaskets replaced. A can of carb cleaner and a gasket kit will cost you about $10 from a mower parts dealer. You'll need to read the model name and number of the carburetor to get the right parts kit.

Could be a tuning issue.....will it go to full throttle?

Just sitting around for a long time doesn't effect gas engines like it does glow engines. If it's running but not running well it is usually just not in tune. Either timing or the carb needles. I just fired up one of mine that was in a crash then put under the bench several years ago. I did have to set the timing after I installed a new ignition but it fired right up. It then required the needles to be re-set. I had to replace one of the needles due to a bit of a bend so I knew it had to be adjusted a little. I have a mag on my Zinoah G-62 and that engine sits under the bench for a decade or more and usually fires right up when needed. I have rebuilt the carb on this engine once when the diaphragm stiffened up. You can get a complete carb kit from any small engine repair shop if you think you need one. I do like Jester said and just use a spray can of cleaner to flush them out. If you stored the engine wet after running then the diaphragm may be a bit stiff but it does sound like it just needs to be tweaked on a little bit.

no bogs down

how to set timming

i need a spinner to

There is a gas engine forum you can look at too. If it is bogging down then it is just the needled adjustment. The tuning of the needles is just like on a glow engine, you set the high needle first then the low end. I adjust mine a couple hundred rpm fat then after flying I fine tune them depending on what is needed. Once set I leave them alone.
Really, go into the gas engine forum and look around. It's a lot of work taking photos and teaching how to time one and posting it in the beginners forum when it has already been done in the gas engine forum. Gas engines aren't something most beginners will be using for a while.

thanks

If you need a photo essay on timing one I can do it again but I'm sure there is one in the other forum.