Rotax engines

Mike Fawdrey · Post by **Mike Fawdrey** » Sun Aug 03, 2008 11:36 pm

Can anyone out there tell me what is the difference if any between Rotax 582 Blue Top and grey top

Guest · Post by **Guest** » Sat Aug 09, 2008 12:28 am

Yes, earlier greys had a weeker crank but later ones had the 618 crank as per the Blue tops, also there is a diffrence in the cooling system .

The greys had one stat and the Blues have two ( that open at diffrent temps to avoid shock cooling ) with the extra one in the water pump and an extra hose running round the Mag end to the cylinder head stat housing.

Mike Fawdrey · Post by **Mike Fawdrey** » Mon Aug 11, 2008 8:15 pm

Thanks for the information