Checking cooling system / overheating

[BrianW]

Got my '92 WaveRunner LX running with it's swapped in 61X 'raider' 701 cc engine - took it out and it overheated within a few minutes and I believe the over temp sensor kicked in and limited revs to ~3200 rpm on my tiny tach.

My question - how does the cooling system function on these? Is it feeding pressurized coolant from the impeller into the engine to cool it? Could I have swapped inlet and outlet hoses? Is there a water pump in the engine?

Any help in getting this solved would be greatly appreciated!

[Technical Support]

It relies on pressure fromt he impeller, yes. www.hlsm.com has the microfiche for the hose routings.

[BrianW]

Thanks for the really quick reply!

Does "all" the cooling water exit out the exhaust so there is only a "feed" hose coming from the pump, and then the water is routed through the engine, through the exhaust 'jacketing' and then out the exhaust pipe in the rear of the ski?

[Technical Support]

No, there is also a bypass line - check the microfiche.