Please note that the Watermota J-Type gearbox needs ordinary engine oil (IE something like Castrol GTX) and NOTEP 80 or EP90. Hypoid oils will cause untold damage!  

--Last edited by Ramage on 2008-04-11 21:20:15 --

Hmmm....the handbook says 30 grade, while the plate on the gearbox says 20:50 or something like that.

I found a little oil in the bilges, just a smidge, so topped the box up with half a cupful of 20:50.

I assume with a 1.75 pint capacity this wouldn't cause any harm?  

I'll change it over the weekend at Ashmount I think, although it was perfect in the 6 hours or so of use it had since  

Either straight SAE30 or 20/50 should be fine... its the hypoid EP stuff that kills J-types!

Luvvly jubbly....

Full steam ahead for tonight then!

John ->  

Claire ->  

Paul ->  

Marion ->  

A word of warning from the now wise.

Take care when changing the gearbox oil as the dip stick is a daft shape and tends to give misleading results. I ended up overfilling my gearbox and after using the boat for a weekend it blew a seal in the gearbox. Gearbox out and a trip to Sheridan marine for a full seal and gasket replacement cured the problem.

I now top up with the top cover removed (4 bolts) so you can see the oil level, a lot safer way.

I'll try that!

Mine was a little overfilled, but it came out via a breather...