DMW
Platinum Member
The transmission takes 11 litres (quarts). 10 1/2 may not show in the sight glass, 11 1/2 may completely fill it. Keep track of how much you pour in. Check the breather valve on the oil fill cap while you have it out.
my GC2400 manual,page 56, which (iirc) is the same procedure for ALL 17xx series is engine off.Idling, on a level surface. If the sight glass is totally full, you probably won't be able to tell if it's empty or full; you might look at it first with the engine NOT running (it will be a bit lower) to see if you can see the fluid line in the sight glass. Then start and look again. Better yet, stand back there looking while someone else starts the engine.