That was a common problem on those engines. Unfortunately,the Lawnboy site no longer has IPL's for that engine series. Maybe your source has some NOS parts that he figures should be worth big dollars. Keep looking.

Well you have to have the model number off the mower deck to view an IPL, they do not go by engine numbers.

Walt Conner

True enough. I looked up the 5260 which used that engine and there is no IPL.

I should have included the mower number, it is a 5271. I bought the mower used from a mower rebuilder - so I suppose there is a chance that the engine is different from what originally came on a 5271, but I think it is more likely that this is original.

What does IPL and NOS stand for?

Thanks

I stand corrected, your mower is listed. IPL is Illustrated Parts List, NOS means New Old Stock. These are old parts that have never been used.

Here is a link that might be useful: Lawnboy carb