TRM 231 won't run

[fitenfyr]

Ok guys hit a big snag here.

The engine won't start....

This is a previously crashed TRM 231 with no visible damage
I have spark (checked with the plug against the case method)
I have fuel going to the engine (plug is wet)

I am at a loss. I have not seen a gasser yet that won't at least try to start if not start on the 2nd pull.

I sent Al and e-mail, but maybe we can figure it out here first.

I am wondering if the timing has gotten off from the last crash.
Never dug into one enough to check that so any pointers will be helpfull.
I am also going to try a fresh plug next time, maybe the spark is too week.

[WillJames]

If your bottom needle is lean, it will be hard to start. Not sure how that would have changed in a crash...

[fitenfyr]

Well hard is not the word...It just won't fire at all, but I will check it out.
I am going to call Al here in a sec.

Thanks Will

[bigrcr]

There are a couple of things to look at encountering your problem after a crash. It does appear that you are getting fuel if the plug is wet.

Just because the plug is sparking against ground does not mean that you have a good usable spark (it should be blue to ignite the fuel).

Here are a few things to look at:

Ignition

-Make sure the plug insulator is not cracked. (replace the plug).
-Make sure the primary coil is positioned correctly with no debris (especially metal) around the magneto. The coil could possibly (although doubtful) have slipped away from or toward it, changing the gap.
-Make sure the high tension plug wire is not pulled out of the boot so that it "arcs" and grounds out the spark against the shield (if one is being used).
-Check the secondary coil for damage and proper grounding.

Fuel Delivery

-Ensure there are no cracks in the mounting insulator, block or mounting ears for the carb, etc.
-Ensure the carb is mounted so that all of the gaskets, carbon plate, etc. have no leak.
-Make sure there is no dirt in the carb. Take the carb apart and inspect it and clean as necessary.
-While the carb is apart check the pump diaphragm to make sure it is not stretched or damaged.
-Check the fuel delivery needle/lever assembly. If this lever gets bent in a crash, the motor will not receive fuel as the needle will not allow the fuel to transfer.
-reset the low and high mixture needles back to default and start over.

Hope this helps!

[fitenfyr]

Thanks John.

I talked to Al today and he thinks it is just a matter of the carb being really dry.
He suggested a good "choking" before I try it again.

The engine does not have an visible damage to it anywhere.
I thought the same thing about the coil, but Al said basically the same as you that it was highly unlikely that it slipped.

The owner is taking her home tomorrow so I won't get a chance to figure it out before then.