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Old 30 April 2005, 16:00   #1
Country: UK - England
Make: Avon Searider
Length: 4m +
Engine: Yamaha 50
Join Date: Jan 2004
Posts: 5,673
Premix in a 4-stroke?

Just out of interest, what would happen if you put premixed fuel (100:1) in a four-stroke engine. I'm thinking of a car engine here......

I say this becasue I nearly ran out of fuel in my car last night. I did however have a can full of premixed fuel in the boot. Would it have been OK?

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Old 30 April 2005, 16:28   #2
Country: UK - England
Town: london
Boat name: Frances May
Make: vailant DR450
Length: 4m +
Engine: mercury 50 hp
Join Date: Sep 2003
Posts: 761
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not much just a bit of smoke just make sure you add more petrol to dilut the mix


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Old 30 April 2005, 21:28   #3
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
If your car has a catalyst which most of them do then you will wreck it big time-
then when you get it's first MOT it will fail - seen the price for a new cat???

Mind you how much it would take is anyone's guess - wouldn't risk it though!!!

Having said that catalysts are the biggest con ever - still that is another story....
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Old 02 May 2005, 03:37   #4
Country: UK - England
Town: Nr Faversham, Kent
Boat name: C Rider
Make: Avon
Length: 5m +
Engine: Yam 80
Join Date: Jan 2005
Posts: 486
I used to tip all the stale premix into our old Panda 4x4. Ran fine. Mind you a Panda would run on camels piss if it had too.

As regards the wifes newer Renault complete with cat, I have tipped in premix before but it was diluted with a tank of neat and the cat tests at the mot's have been spot on.

Stale fuel has not been a problem with the searider, its been used all year round including in the snow.
Searider - The Best 5.4 x Far
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