help with overheating pump

[Method]

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

 

[tim kettring]

I would just use a 555 timer and a power transistor to drive the motor
INTERMITTANTLY .

tim

"Method" <pmitsaki@bigpond.net.au> wrote in message news:<Kwf7b.90403$bo1.43645@news-server.bigpond.net.au>...

I have a waterbottle 'windscreen washer bottle' from the same car as what i
have, which i am using to create a spray for my intercoolers. i.e you flick
an on switch and instead of it spraying my screen it sprays my intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up really
quickly. After about 30s of continuous use its too hot to touch. Is there a
way i can reduce the power going to it without knowing how much the voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks

 

[Method]

Thanks for all of your information. Ill have to look into a few more things
before i go ahead with it.

"Method" <pmitsaki@bigpond.net.au> wrote in message
news:Kwf7b.90403$bo1.43645@news-server.bigpond.net.au...

I have a waterbottle 'windscreen washer bottle' from the same car as what
i
have, which i am using to create a spray for my intercoolers. i.e you
flick
an on switch and instead of it spraying my screen it sprays my
intercoolers.
The only problem so far is that the two little pumps which connect to the
waterbottle which pump the water to the little spray nozzles heats up
really
quickly. After about 30s of continuous use its too hot to touch. Is there
a
way i can reduce the power going to it without knowing how much the
voltage
drop across the pump is etc? I tried connecting a 360ohm resistor in line
with the +ve before it gets to the pump and it didn't even turn on. There
is
no markings or spots to check anything with a multimeter on the pumps. All
you can do is follow the wires into the pump and then see the water tube
from the bottom of it. How can it make it run cooler?
Thanks