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Jerry,
Can you check one thing that might solve your issues and that is the fuel cap, it should have a hole in the center of it and if it is blocked then that will cause your problem.
If it is not then I would be following Grummpy's suggestion of checking the bottom seal because you could have picked up something when cutting the grass damaging the seal.
The symptoms are usually the following:
1. Top oil seal damage (will rev high)
2. Bottom oil seal damage (can be hard to start due to not enough fuel in crankcase)
3. The module you have is the old style and had issues as well with breaking down (suggestion is to replace it).

Hope that this is of some help. cheers2

Hello Bruce,
Thanks for stepping in, it's appreciated.

The breather hole in the fuel cap is clear and is one of the first things I checked.

This weekend I will check the seals as suggested. I had previously checked them but only visually with the engine still mounted to see if I could see any oil seepage. I'll take the engine off and look properly.

I'm compiling a list of parts I need and will send it through to Outdoorking. I think I will spend a few bucks and get all the parts I could possibly need (and afford) and get the job done properly - the engine is worth it to get it running well again.

thanks again,
Jerry

Last edited by jerry; 02/03/11 03:24 PM.