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Author Topic:   petrol to oil ratio

strapper posted 04-21-2004 08:05 AM ET (US)
i have a 2 stroke johnson 6h outboard on my dinghy and i was wondering what the ratio of petrol to oil is for this motor
JBCornwell posted 04-21-2004 08:39 AM ET (US)
Hi, Strapper.
If your engine is a 1963 or earlier the correct mix is 24:1, regular unleaded petrol to TC-W3 rated outboard oil.
1964 and later models use a 50:1 mix; same ingredients.
Some models from the 1980s originally recommended a 100:1 mix. That was later recinded by OMC in favor of 50:1.
If you don't know the year of your engine, tell us the model number off the plate attached to the transom clamp. We can determine the year from that.
Red sky at night. . .
JB

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Author	Topic: petrol to oil ratio
strapper	posted 04-21-2004 08:05 AM ET (US) i have a 2 stroke johnson 6h outboard on my dinghy and i was wondering what the ratio of petrol to oil is for this motor
JBCornwell	posted 04-21-2004 08:39 AM ET (US) Hi, Strapper. If your engine is a 1963 or earlier the correct mix is 24:1, regular unleaded petrol to TC-W3 rated outboard oil. 1964 and later models use a 50:1 mix; same ingredients. Some models from the 1980s originally recommended a 100:1 mix. That was later recinded by OMC in favor of 50:1. If you don't know the year of your engine, tell us the model number off the plate attached to the transom clamp. We can determine the year from that. Red sky at night. . . JB