first cox .049 motor in 50 years

Just soak it in fuel before forcing it to turn over make sure it is free.

MMT wrote:Well,don't feel so bad about posting here now. I now own a Cox motor at least. hehe
It's stuck . Anything I need to know or do before atempting to free engine up?
MMT

Seriously though, apart from a good over night soak in plus Gas, WD40 etc.
DO NOT attempt to dismantle it without 2 cox wrenches.
The chances of doing so without harming it or even wrecking it are V slim.
In my (limited) experience it'll probably be the crankshaft thats stuck.
Once you've got the head, cylinder off, have soaked over night or longer screw the prop
bolt in and give it a light tap. All but the most mangled will free up.
Good luck
J

If it is still stuck after a day or two soaking, heat it up with a hairdryer. It is the castor that has stiffend (most probally)

Regards
Thomas Pedersen

Remove the backplate. If you can remove the tank, then do so, but take care that you don't tear the tank/crankcase gasket. If you can get the tank to budge a little, adding fuel or denatured alcohol to the gasket area may help free this up. Ideally, you'll be able to fill the crankcase area with whatever solvent you're using and let that soak for a while. Do the same with the piston/cylinder area --- remove the glowhead if possible, but again take care and don't force. After a good soaking, heat the entire unit --- a blow dryer will get it pretty warm. Heat is your friend since it tends to soften congealed castor oil. If it remains stuck, don't apply too much pressure, just continue to soak, re-heat and try again.

andrew

Thanks to all for the advice. John Goddard's first peice of advice is the probabily the best
but it appears that I'm not smart enough to take it. Will now proceed to try and help the little guy. Now, where did I put my second engine wench?

MMT wrote:Thanks to all for the advice. John Goddard's first peice of advice is the probabily the best
but it appears that I'm not smart enough to take it. Will now proceed to try and help the little guy. Now, where did I put my second engine wench?

DO NOT try to unscrew the cylinder unless you are ABSOLUTELY sure the piston is free, otherwise you WILL break the codrod. (I speak from bitter experience!)

Put some heat on it with a hairdryer before dissassembly,,nice and warm.

Ivanhoe wrote:

MMT wrote:Thanks to all for the advice. John Goddard's first peice of advice is the probabily the best
but it appears that I'm not smart enough to take it. Will now proceed to try and help the little guy. Now, where did I put my second engine wench?

DO NOT try to unscrew the cylinder unless you are ABSOLUTELY sure the piston is free, otherwise you WILL break the codrod. (I speak from bitter experience!)

Or give the piston a whopping amount of play. I have done that before.

,,or bend the rod trying to spin over a seized/gummed motor.

MMT:

Try this for information:

http://coxengines.ca/TSC.pdf

Most of your questions have been asked here many times previously. The forum helped Bernie design this guide. This will give you a printable reference for your guidance.

There are other Cox guides on this site too.

Ivanhoe wrote:

MMT wrote:Thanks to all for the advice. John Goddard's first peice of advice is the probabily the best
but it appears that I'm not smart enough to take it. Will now proceed to try and help the little guy. Now, where did I put my second engine wench?

DO NOT try to unscrew the cylinder unless you are ABSOLUTELY sure the piston is free, otherwise you WILL break the codrod. (I speak from bitter experience!)

with my first golden bee, it was stuck and i tried turning it over and the pin that is on the crankshaft that connects to the connecting rod snapped

MMT wrote:Thanks to all for the advice. John Goddard's first peice of advice is the probabily the best
but it appears that I'm not smart enough to take it. Will now proceed to try and help the little guy. Now, where did I put my second engine wench?

i've got a second pair of .049 wrenches, pm me if you want them mmt