Another what year Merc

[billbro]

" another "what year is my

" another "what year is my motor" inquiry. The motor is a Merc 20hp, blue striped cowling, the word "Thunderbolt" on it. Serial no. 4824353. Thanx in advance for trying. Bill "

 

[tonyob]

"Bill,

That is a 1978 engin

"Bill,

That is a 1978 engine.

Tony"