[Jezorek]

I purchased a 155 HP commercial engine. The previous owner said it was either a 1989 or 1990. I can't find a serial number for identification. Are there physical differences between to two years? There are two models of this engine. One is a E155WTLESM and the other is a E155WTXESM. What is the difference?

Thanks

[tashasdaddy]

if any very minor.

[Dhadley]

Those motors go by model numer not serial number for the year. "ES" designates 1990 so both model numers you list are the same year. WTL means a Work (commercial) model, T means it has Trim & tilt from the factory, L means it's a 20" motor. WTX means Work model, TnT and a 25" motor.