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Old 11 July 2009, 11:53   #1
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Country: UK - Scotland
Town: Queensferry
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Suzuki crank seal orientation

Hi,
I'm just about to reassemble my Suzuki DT4 (2-stroke single) after replacing the main bearings, but need some advice regarding which way the crank seals should be fitted.
I have always assumed that the seals would be fitted with the spring to the inside of the engine, and the lettering facing the crank ends.
My workshop manual (Seloc) says the same.
However, when i dismantled the engine, the lower crankcase seal was fitted with the spring side facing outwards (i.e down)
Is this likely to be correct, or put together incorrectly on a previous occasion?
TIA.
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Old 11 July 2009, 20:03   #2
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Country: UK - Wales
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Boat name: doggypaddle
Make: Avon 5.4 Searider
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Engine: yamaha 80
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could be right......the gearbox seals were like that on my yammy, i guess because the water pressure is higher than the pressure in the gear case.
same goes for the crank seals, The crank case is is at below atmospheric pressure so the spring on the outside of the seal would keep the air out.
i would double check though! It does LOOK wrong if your used to automotive stuff.
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