I've been having problems with my quad running hot since I bought it. I'm not sure if it's running too lean or if the thermostat is on the high side. Since my fan keeps burning fuses every time I go in the water, I've decided to add a on/off switch. What I would like to do next is install a temperature gauge off the temperature sensor for the water jacket on the head. Unfortunatly, it's a switch for a light and not a sendor. Does anyone know of a combination switch and sendor sensor exists? What is the thread size and lenght on the existing sensor switch?

 

Not sure about your switch question, but while I was at it, I would add a bigger fan. That would get more air moving through your radiator and help keep things cool.

 

instead of mounting a switch I would just go to your local automotive supply store and purchase a 'bus' fuse of the appropriate size. These fuses automatically reset themselves .Just remove the fuse thats currently in the fuse black and replace it with the bus fuse. ( you will have to make to small wire leads with spade connectors to plug into the fuse block as bus fuses usually have small threaded post connectors on them. I prefer the bus fuses to switches because theres no danger of forgettin to turn the switch on/off, if the fuse trips it will reset itself .

 

A 'bus' fuse? I had'nt heard of that before, I'll look into it. The reason why I want to add a temperature gauge and keep the existing temperature light is to make sure I don't forget to turn the fan back on and overheat my engine. It would'nt take much since its already running hot. Thanks for the advise.

 

If you put in a switch you can either get a lighted switch or get a led like for car alarms and hook it up to the switch so that when the switch (single pole, double throw) is in the off position the light will be on. Mount the light right up in your instrument cluster.Now for the overheating. I would bet if you took your radiator off and gave it a good cleaning that would fix the problem. If you go riding in high water, mud or worse yet the combination of the two you probably have stuff packed in the radiator. If that doesn't fix the overheating problem then I would pull the thermostat out and check it to see if it is functioning properly.

 

I agree with cummins on cleaning the radiator. This has been the problem on every hot running Cat that I have seen. Just hold a light up to the backside of your radiator and see how much light is getting trough, I bet not very much. When they get good and stopped up the best way to clean them is from the back to the front.
I also run Water Wetter in all of my liquid cooled engines, it is made by Redline racing products. This stuff really works.

 

Are you assuming that the fan runs because the motor is hot? seens that some other manuf. puts thermstats on thier radiator fans, to only run when the motor is warmed up or under load.
My 500 fan runs all the time, yes the resetable breaker is a good idea for the fan because the fuse will blow if the fan is under water.

 

You can buy a resetable fuse that is the ATO blade style that will plug right into the existing fuse block replacing the standard ATO fuse, the only problem is that it is taller and you will have to modify your fuse box cover, there was a replacement cover (made by AC) that works with the resetable ATO style circuit breaker, but I don't know if it is still available. I'm with the rest of the guys, clean your radiator, the only way to get it truly clean is to remove, that way you can clean it from the backside as well, it doesn't even take a hour. ACZR2K

 

Thanks for the advice gentlemen...I am aware that the fan is always running, this is the reason why I will be adding an LED on/off switch to prevent the fuse from blowing when I go snorkling in muddy waters. The LED will let me know if the fan is on or off.

I do keep my rad clean and I'm running a 50/50 glycol water mixter due to the low ambient (-40 Deg Cel)in Northern Canada. The fan is always running, but the thermostat controls the water jacket flow in the head.

Although my temperature light has never gone on yet, I know my engine is running hot due to the fact that the inlet part of my exhaust pipe gets orange/red. I'm pretty sure my engine is running to lean or my thermostat is on the high side. I don't beleive its a rad cleaning problem or a fan problem.

I intend to leave it that way so I don't lose on power, but to make myself aware of the temperature, I want to add a temp. gauge and keep the temp. light in the panel.

This brings me back to my original question.....Does anyone know of a combination switch/sendor sensor that would replace the existing switch sensor in the water jacket head. Having a switch/sendor sensor combo, I would be able to keep my temp. light and add a temp. gauge. This would help me make sure that I don't overheat an already hot running engine.[img]i/expressions/face-icon-small-smile.gif[/img]

 

Does anyone think it would be a good idea to wire the fan on a 375 to have it run all the time like a 400 or 500 does. The oil cooler lines feel really hot when you touch them.