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| Author |
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mscar
| | Posted on Sunday, October 12, 2003 - 10:21 pm: | 
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I believe that I have a Motorgo, made by Lockwood-Ash, ser# 20729. I can't get it started, read all the tips that is printed, the carb floods and blows back, I adjusted the float correctly but still leaks. The motor will pop one time, but will not continue to run. I am thinking that the carb is junk. I have heard about a Scheber Carb and a Lunkenheimer Carb. What are these? How can I tell what I have on this motor? Which carb should I use so the motor will start easy and be reliable? Are there any good spare carbs out there that a guy could buy? Thanks. |
J.B. Castagnos
| | Posted on Sunday, October 12, 2003 - 11:26 pm: |
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If the Motorgo numbers were like the L-A you have the 729th 2 1/2 hp made. These early engines were offered with both the Lunkenheimer and Schebler. The Schebler has a float and a seperate poppet valve while the Lunk has a built in poppet valve to shut the fuel flow and hold crankcase compression, no float. If it's leaking gas it will flood quickly, shut the fuel supply and see if it will clear out and run. I have a Motorgo , number in the 800's, it has the Lunk mixer. |
Richard Day
| | Posted on Monday, October 13, 2003 - 08:37 am: |
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I agree with J.B.. Sounds like the inlet check valve to the cylinder is perhaps installed backward if it is a separate check valve from the carburetor. The intake check valve may be missing its spring that closes and holds the the intake check valve closed when the piston comes down on the power stroke. This spring has a reasonably light pressure just enough to make sure the valve closes and stays closed but not so much that it won't open on the intake stroke as the piston goes up. Doubt your carburetor is junk I would look to the inlet check valve as the real problem. Make sure it allows the air fuel mixture to enter the crankcase and stops the air fuel mixture being blown back out of the carburetor. Make sure you either have a mixing valve with the check working right or a carburetor with a built in check or separate check as either works as well. |
andrew
| | Posted on Monday, October 13, 2003 - 08:50 am: |
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mscar,
I'm not sure if you have detirmined if you have a schebler carburetor or not.... we have pictures of a schebler mode "D" at this link. |
mscar
| | Posted on Monday, October 13, 2003 - 05:51 pm: |
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Andrew, Well I don't have a Schebler. My carb doesn't look like that. What does the Lunkenheimer look like? My carb has a float and a needle valve that the float shuts off the gas when the bowl gets full.(like a normal older car carb). It also has an adjustable needle valve that can be turned for the mixture. Also built inside the carb, at the outlet of the carb, before the inlet to the cylinder is a "pop valve"(?) that flops up and down. It doesn't have a spring on it. I assumed that is worked by gravity. Is this valve supposed to have a spring on it like Richard suggested above? Is there a diagram that I could look at? The engine fires once, than stops. Could this pop valve be my problem? HELP! |
J.B. Castagnos
| | Posted on Monday, October 13, 2003 - 10:35 pm: |
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Go down the One and Two Cylinder section to where it says Motorgo with lever timer. The third picture is a 2 1/2 Motorgo with a Lunkenheimer. J.B. |
Richard Day
| | Posted on Tuesday, October 14, 2003 - 07:27 am: |
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I find it curious that only a single pop seems to be the current performance. Seems to me just priming the engine with 40:1 gas/oil mix leaving the priming cup open for the first firing then closing the priming cup it should at least fire and run several strokes with the carburetor or mixer fuel supply turned off at the needle valve. Almost sounds like the engine is flooded.
Check the crankcase drain and make sure its not full of oil and gasoline. If it is drain it off asap. |
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