Hello All!

I'm trying to identify the exact model and build number of the Lister engine on my dad's generator. I think I have an answer, but I'd like someone with more experience to confirm my process.

There's no metal plate on it any more, but at one time this number was copied from it: 48 01168 LPW4A.

According to the operator's manual, the first two digits represent the year, with the example of 06 = 2006. The generator was purchased new in 1998, so should the first two digits actually be 98?

There was no build number copied, so given the model number of LPW4, I used the engine build chart in the parts manual (with 50-60 possibilities) to eliminate all build numbers that didn't apply to this model. The spec label showed a fixed speed of 1800 rpm, so I also eliminated all variable speed builds, and any dual or constant speed builds that weren't fixed at 1800.

At this point my list of possibilities was down to builds 18, 72, 74, 79, 174, 227, 274, 279, and 281.

In the parts manual I found a variety of speed controls which applied to various builds. Our control has three set screws, and there was only one matching control in the book. It applied to builds 27, 28, 41, 74, and 81. Crossing with my previous list gives me the only remaining possibility of build 74.

So, after all of this, is it reasonable to conclude that my model number should read 98 01168 LPW4A 74?