I have my dad's old Johnson 5 hp TD 20, I believe the Ser # is 668446. Any idea what year it is? The motor runs good-have been using it. <br /><br />Thanks<br /><br />Doug
That engine was made between '46 and '49 (all the same model). It's amazing how many of those antiques are still in use.<br />Fuel mix 24:1 gas to TCW-III outboard oil. Dont run 30W.
