Reply To: Oil type

[Bob Wight]

Well, I’m no expert on that Speeditwin model but if it were my motor, I’d run standard J/E TCW-3 mineral oil at the originally recommended ratio of 3/4 pint (12 oz) per gallon. With synthetic oil, maybe you could go to 16:1 (8 oz) but I’d defer that call to those with more experience on the Speeditwin. Even at the original factory recommendation ratio, modern TCW-3 oil will burn a lot cleaner with less smoke than the 1940s vintage outboard oils.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."