1968 mb 250 s gasoline engine

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herewegogod - 31 Mar 2006 01:57 GMT

I cannot make this thing start. The motor spins but no fire. Was running
fine until my son used it one time.

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Tiger - 01 Apr 2006 00:58 GMT

Check fuel filter... check spark plug to see if it is black or white... you
need to do diagnostic.

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M100 - 01 Apr 2006 01:22 GMT

> I cannot make this thing start. The motor spins but no fire. Was running
> fine until my son used it one time.

Remove a spark plug and check for spark when cranking.

If this is a 250S, not SE, it has two zenith carburetors. Toward the
front and just under hood is fuel inlet to carbs coming from mechanical
fuel pump beside dipstick for oil. The hose runs along the front of the
valve-cover where the cam sprocket is.
Loosen the connection and observe whether fuel emerges, when cranking.
Use a rag, and disconnect the coil wire; take all precautions
regarding gasoline under pressure.

Open the Oil-filler cap and observe the camshaft turning.

Chances are, you will have no fire, no fuel or no cam-action. Then
proceed.
This car also has breaker-points, which could be bad.
Is there water in the oil? My 250S suffered a cracked head.

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