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Carburetors, Mixers, Fuel Pumps and fuel delivery Discussion about misc. carbs, mixers, fuel pumps, injectors.

Carburetors, Mixers, Fuel Pumps and fuel delivery

1927 Jaeger engine help


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  #1  
Old 08-08-2014, 06:29:58 PM
Rusty Irons Rusty Irons is offline
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Default 1927 Jaeger engine help

Hello again everyone, I'm working on a Jaeger named Hercules engine and it has me pulling my hair out, first a little about him: his name is Dutch and has been in a barn unnoticed for years, now I am bound abd determined to have him running again. I have cleaned the varnish from his tank,line,checkvalve, and mixer. I have the wico mag fireing evenly and plenty hot, I have had him runing and sounding great for about 2 minutes, then the fuel mixer (carb) acts up. Too much, not enough snort snort snort die....choke him and crank again putt putt putt, or nothing. Its a roll of the dice. Has anyone else had this issue? Where do I turn next. Thanks guys
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  #2  
Old 08-11-2014, 02:03:11 PM
BobRR BobRR is offline
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Default Re: 1927 Jaeger engine help

Some engines like some choke all the time. Get it started and leave choke part way on and adjust needle valve till runs smooth. See if that helps. Bob
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Old 08-11-2014, 04:19:47 PM
Glenn Ayers Glenn Ayers is offline
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Default Re: 1927 Jaeger engine help

Sounds like maybe the check ball isn't sealing properly all the time.
Check ball isn't so critical when the engine was running full governed rpm under load .... but becomes VERY CRITICAL when these engines are slowed down to "Show" rpm's. The longer "coasting" times let the gas fall back to the tank ... then when the engine needs that snort of fuel before it loses that last final momentum rotation .. the fuel isn't there. It then needs a few revolutions under valve (suction) to pull the fuel back up.

I have a Jeager 3F that runs super slow ... with no choke. This is only possible with a properly functioning check ball.
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Old 09-24-2014, 12:21:55 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: 1927 Jaeger engine help

1) Make sure the check is free of debris and varnish. Clean out and try blowing and sucking on the fuel line, to be sure it closes reliable each time you blow back into it. 2) Make sure their is no loose debris in the fuel tank. 3) Check the intake valve to see that it does not have excessive valve stem clearance. If the stem wobbles in the bore more than about 10 thousandths, then it will need to be bored and bushed, or a larger diameter stemmed valve be used after reaming the bore to size. 4) Make sure the intake valve spring closes the valve easily. 5) Make sure the exhaust valve spring is in good condition (strong and no paint, pits, or rust on the spring. A weak exhaust valve spring will present the problems you are giving. Lastly, hold the high tension wire about 1/8" off the plug, while the engine is running. See if spark goes away, once the engine warms up - possibly a bad condenser. One of those neon spark testers will work well here too.
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