likely will shorten the life of the motor or cause it to continue to overheat and shut
off. You can oversize the motor but not the pump.
Jet pumps on Gatsby spas are basically a generic designed pump. The main
body or bracket mounts on the motor by the 4 bolts that hold the motor together
and pump to motor.
Next part of the pump is the mechanical seal. This seal is 2 pieces. One piece
goes into the seat cup of the pump housing. The other slides on the impellor’s
shaft. When the impellor tightens to the motor shaft, the two halves press
outward and seal the pump.
The impellor attaches to the motor shaft. They simply screw together with
standard clockwise screw. When the impellor rotates it is what moves the water.
A large oring seals the front of the pump (volute) when the bolts tighten them
together.
Last part is the volute or front of the pump. It has a seat the impellor sits into
when the bolts are tighten.
Simply explained, when the impellor turns it compresses the water and the
compressed water escapes out of the top of the pump.
Commonly, the “
motor
” is ONLY the motor. Most common are either AO Smith or
Emerson motors although other companies make motors like GE. Spa motors
are either 115vac or 230vac although some can be either. If either, you can “field
wire” the motor to match the application you are installing. Likely the motor came
wired for 230v but you can field wire it down to 115v. The way to tell if your motor
is dual voltage is on the label of the motor. It will show a High and a Low wiring
diagram. This is relation to volts, not speed. Typically you will check the label to
see what voltage the motor is wired for. If its wired for the wrong voltage, you
follow the motor’s diagram.. But typically, it’s either 115v or 230v.
The key for motors is matching the horsepower (hp) of the motor to the pump.
You can have a motor oversized for a pump hp and be OK. It’s like having an
oversized motor for your car. But you cannot have a pump too large for the
motor. If you do, the motor will have a early failure. It’s like driving a large car with
an undersized motor. Best bet is to match.
Gatsby used one and two speed 115v motors and one and two speed 230v
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