os 70fs hard to start

by j agapi
(calgary)

Rhe engine is hard to start. I sometimes have to add fuel to the carb. It's an os 70fs

Comments for
os 70fs hard to start

Average Rating

Click here to add your own comments

Feb 14, 2010
Rating

Once we had chokes.
by: Michael from Oz

G'day All internal combustion engines need a rich mixture to start so it is quite normal to have to prime the engine some way.

This can be -

1. Squirt about 1cc or fuel into the carby.
2. Choke the carby by covering the air inlet then turning the engine over a couple of times and watching for fuel to come up the fuel line.
3. Turn the engine over with an electric starter with the throttle just open.
4. If you are using muffler pressure, cover the outlet of the muffler and turn the engine over a few times watching for fuel to come to the carby.

Remember, back in the dark ages before our cars had fuel injection systems, the carby always had a choke to allow a rich mixture for starting. These days, the computer does it for us. Our glow engines are no different.

I generally use method No 4 as it is simple and usually does not result in the engine being flooded with too much fuel. Fill the tank, put a finger over the outlet of the muffler (but not if it is hot) then turn the engine over by hand with the glow disconnected three or four times while watching the fuel tube. Once you see fuel at the carby you are usually nearly ready to go. Then remove the restriction from the muffler and turn it over a couple of times more. Apply the glow starter. If you now firmly hold the prop and turn the engine over you should feel a Bump as the engine fires. If you do, you are ready to apply the starter with the throttle set about 1/4 open and go.

Have fun.

X Close Editor

Feb 14, 2010
Rating

Submitted by: Michael from Oz

Title

Comment
G'day All internal combustion engines need a rich mixture to start so it is quite normal to have to prime the engine some way. This can be - 1. Squirt about 1cc or fuel into the carby. 2. Choke the carby by covering the air inlet then turning the engine over a couple of times and watching for fuel to come up the fuel line. 3. Turn the engine over with an electric starter with the throttle just open. 4. If you are using muffler pressure, cover the outlet of the muffler and turn the engine over a few times watching for fuel to come to the carby. Remember, back in the dark ages before our cars had fuel injection systems, the carby always had a choke to allow a rich mixture for starting. These days, the computer does it for us. Our glow engines are no different. I generally use method No 4 as it is simple and usually does not result in the engine being flooded with too much fuel. Fill the tank, put a finger over the outlet of the muffler (but not if it is hot) then turn the engine over by hand with the glow disconnected three or four times while watching the fuel tube. Once you see fuel at the carby you are usually nearly ready to go. Then remove the restriction from the muffler and turn it over a couple of times more. Apply the glow starter. If you now firmly hold the prop and turn the engine over you should feel a Bump as the engine fires. If you do, you are ready to apply the starter with the throttle set about 1/4 open and go. Have fun.

Cancel Delete Delete & Ban

throbber Updating Comments page...

Feb 14, 2010
Rating

Can you provide a bit more info?
by: Matt

Have you tried opening the high speed needle a bit?

Does it run OK once you get it going?

Some more details of your problem and what you have already tried will help to determine what the problem may be.

That's a nice looking plane, did you build it yourself?