1 x crankcase SEAL for the Vire engines
(If you want a set, please purchase 2x for 6hp, 3x for Vire 7/12)
High Quality, double-lipped, type-tested over 15 years by VIRE UK, no failures.
1000 Item Items
Warning: Last items in stock!
Common Faults & Additional Info
Will need replacing if they loose sealing ability (if the engine overheats or rusts, the lips weld/roughen and the springs rot inside) and if you are replacing crankshaft into crankcase generally (e.g. rebuild/replace bearings)
If you are replacing main bearings, then you should always replace these.
When the seals fail - you could get 2 problems:
1 petrol (the gear/aft end heats up more than the flywheel/fore end) seeps into the gearbox.
2 petrol seeps into the flywheel/points get dirty - also slight loss of compression/power.
Check to see if your Vire has deteriorated seals: remove points inspection cover/ flywheel: if there is any oil dribbling below the points/ignition plate, it is a sure sign.
If the front main bearing is rusted, it is quite likely it has a leaking seal too.
There is little point replacing seals onto a rough or pitted shaft. our 'crank land sleeve' can rectify.
Seal lips and springs have to point towards the pressure/piston.
On the Vire 7 the third seal faces the gear oil, but on the vire 6 there is no third seal - just a special seal cage which is difficult to remove even with the gearbox off.!
Easy to fit the front one with the crank out but the 6hp rear one is in a difficult to prize our cage - thats a bigger job.
For any further assistance please contact me.