Wisconsin AENLD Engine Questions

Posted by ktrent on May 05, 2012 at 21:11:32 from (24.238.81.115):

I have a 9HP Wisconsin AENLD engine on that Jacobsen "Mow Mobile" I mentioned in a previous thread. The engine is having problems starting. Every year after sitting covered for the winter it has trouble starting for the first time, but this year it's been particularly bad.

It takes at least a dozen pulls to sometimes even get it close to starting. When it finally does start it runs fine and stays running. If I let it warm up and then shut it off and try to start it 5 minutes later it will not start again.

The high speed needle valve on the carb is supposed to be adjusted 3/4 to 1 1/4 turns out but it won't start at all at that position, so I just kept bringing the needle out further and further to try to get it to start. Right now I've lost count as to how far out it is but would estimate about 8-10 turns (way more than it should be), but it is at this point only that it will start once in a while. When cranking the engine, it backfires through the carb with a loud pop at times. Also a strong smell of fresh fuel is blown out the exhaust while cranking.

I've removed the small drain nut on the bottom of the carb and the gas drain out a bit. Gas does come out so I know it is reaching the carb and not being restricted somewhere in the line. I also sprayed carb cleaner up the hole. I've cleaned and regapped the spark plug to the recommended 0.030. I've replaced the spark plug wire. I've cleaned and regapped the breaker points to 0.015 in the magneto. It does seem to be getting spark. When I remove the plug and attach it to the wire and then place it up against the engine head (metal), I can see a definite spark when I turn the engine slowly by hand. Each time the magneto "clunks" it produces a definite spark. The engine seems to have compression as it is difficult to turn over by hand with the spark plug installed.

So my question is..... does this sound like a carb problem or something else (like a valve)? I know someone who will sell me a NOS carb if I need it. The only problem is his is a Bendix L63H and mine is an L63E carb. I've asked around and been getting conflicting answers as to whether I can substitute the L63E for the L63H. Would the L63H work on mine in place of the L63E? I also need to know definitively whether it is the carb or not as this guy is selling it for around $150. So I don't want to put a new carb on it unless thats the problem. And I definitely would rather not try and rebuild mine as I have never rebuilt a carb before and this one looks complicated as heck. Even my handyman neighbor who reuilds my carbs for me won't touch it.

So is it the carb or something else?

Replies:

• Re: Wisconsin AENLD Engine Questions ktrent 11:52:57 05/13/12 (0)
• Re: Wisconsin AENLD Engine Questions greygoat 07:33:24 05/07/12 (0)
• Re: Wisconsin AENLD Engine Questions teddy52food 09:00:33 05/06/12 (0)
• Re: Wisconsin AENLD Engine Questions El Toro 05:58:19 05/06/12 (0)

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