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Old 16 June 2008, 10:50   #1
Country: UK - England
Town: Bucks
Boat name: Spare Rib
Make: Zodiac/Bombard
Length: 6m +
Engine: 90hp Yamaha
Join Date: Feb 2003
Posts: 157
Old 2-stroke mix

I helped a friend by doing a service on a Yam 15 2-stroke recently. Got the motor running nicely on new fuel and transferred a quantity (~15 litres) of old fuel to my portable tank. This fuel is at least 2 years old and is pre-mixed with oil. It has developed a brownish tint.

I was intending to mix this old fuel with 35 litres of new fuel and add it to the inboard tank on my RIB (which is 50l capacity). The engine is a 90 Yam 2-stroke which has automatic mixing so there will be some overdosing of oil.

Is this a reasonable, practicable way of using the fuel or should I try and dump it? If so, how?

Tim Spring
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Old 16 June 2008, 11:33   #2
Nick Hearne's Avatar
Country: UK - England
Town: Bucks
Boat name: Blue & Ding Dong
Make: Ribeye,SR4 & Bombard
Length: 6m +
Engine: 115,50 & 15Hp Yams
Join Date: Feb 2004
Posts: 3,232
I would use it as you describe I have used old fuel with out any problems & newly mixed fuel has a brown tint to it anyway!
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