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Fresh water intake

wango tango

Jet Boat Addict
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Location
michigan
Boat Make
Scarab
Year
2017
Boat Model
HO Impulse
Boat Length
19
Got a question , how does the rotax jet pump get the fresh water to go through the exhaust and heat exchanger? I don't see a pump, just the flush inlet and the hole that is in the outlet side of the pump?
 

Speedling

Jetboaters Admiral
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Location
Cedar Lake, IN
Boat Make
Yamaha
Year
2008
Boat Model
SS
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21
If like the yamaha pump it draws from the pressure of the pump. Should be a tube somewhere from pump into the boat. Don't know for sure since they advertise the closed loop cooling
 

Rick215HO

Jet Boat Junkie
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Location
Houston, TX
Boat Make
Scarab
Year
2017
Boat Model
HO Impulse
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25
Got a question , how does the rotax jet pump get the fresh water to go through the exhaust and heat exchanger? I don't see a pump, just the flush inlet and the hole that is in the outlet side of the pump?
The ROTAX engine exhaust gets the water from the Jet Pump itself. If you raise the buckets (fwd position) you can look through your jet nozzles and see the intake holes on the top side of the pump exit just after the impeller. That connects to a hose on the engine side of the boat. This is why you need to clamp the water intake hose if you ever have to tow (engine off) the boat at higher than 10 mph per the manual otherwise you could get water into the exhaust.
 
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