Hi im using a mcculloch chainsaw motor , i may be forced to take off the pull start , i tryed to start it with a cordless drill to see how it would be and it keeps flooding and will not start , any suggestions please.

johnny

The carburetors on those things are picky, does it flood out when using the pull cord?? how is it mounted? cylinder head down?
If it is flooding with the pull cord then the needle is being held open by a chunk of debris. Unless the cyl. head is mounted down, in which case the plug is getting to wet, you would need to lean out the low speed needle just a little bit.
Also depending how old it is you may need to pick up a carb re-build kit. they are cheap.

Ditto on what CRISPYSPA , and also , is this a ZAMA carb , or WALBRO ?
And lets hear the whole sha-bangie ....
Do you prime it - with either a choke or your finger ? Where is the throttle setting when you try to start ? WOT or idle or in the middle ?
Where is your fuel tank mounted ?

Ok guys , the motor isnt mounted yet so its being started in an upright position , it has a primer bubble on it which i only tend to use when its refueled, it starts better without the choke and it is a pretty good starter with the pull cord and i belive it is a walbro carb and its being starting ok without the aid of any throttle

johnny

Ok , last thing I know of to try ...
Could the speed of the drill be going TOOO slow ? A lot of the 2 strokers need a certain RPM before they will create spark.
Try and remove the plug , ground out the plug after removal and hit it with the drill and see if you get any spark .
Between the HP output of the engine , verses the output of the drill , you might not have enough HP and RPM from the drill .
I found this out with a BLACK AND DECKER bat operated drill . ( so , I went and used a regular AC powered drill and used a invertor that I had - extra - used to use them in the truck before I got everything DC opertated )
Worked good then .
let us know

Doesn't sound like the carb is plugged, HMMMMMM...........When pulling over with the cord I think you are rolling the engine over with more RPM than with the drill motor, Which tells me that the no start/flood condition is caused by insufficent spark as a direct result of low rollover RPM. Remedy: use the pull start - or- tune it up, which would include new spark plug, inspection of coil pickup and magnets on the flywheel. If the magnets are even a little bit rusty, clean them up with a wire brush. Re-gap the coil to a smaller tolerance to the magnets.( If possible)
If you are dead-set on removing the pull start and the tune-up does not help, There are electronic ignition kits available. (Unknown if they have one for your engine) If you can find one, they could be spendy. Hope this helps, Good luck.

Looks like Terbo had the same Idea, I'm just so slow at typing [&:] that he beat me to the punch. ( I really need to take a class)

Thanks guys ill try out a few things and let you know ?

oh.... Cripyspa that 50" craft looks the buisiness [8D]

Johnny

600+ rpm's is needed to get enough spark to start the gas engines, unless your engine has EI. Good luck hope that you find the trouble and get that bad boy on a hull.

Well guys i give up ! the motor i have was still in its plastic case i decided to strip it out which meant splitting the two halves of the motor , in putting it back together i broke the piston ring , this engine is doing my head in, with all the trouble i have had trying to get a prop hub ive just got nowhere with this project , i think i will try to get another motor .......


johnny