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Raw Water Flow System
Safe guard your cooling system from costly damage.
The new Raw Water Flow System indicates your engine’s water flow volume.
This system warns you of a potential problem or danger that would otherwise not be indicated by a water pressure gauge
alone, thus preventing cosmetic and structural damage to expensive exhaust headers, intercoolers and cooling systems.
What is Water Flow?
Water flow is a real indication of water surging through a cooling system such as: exhaust headers, sea strainers,
impellers, Gen sets, intercoolers and any other marine or industrial applications that utilize water flow.
Why You Need It
Don’t confuse water flow with water pressure; as many OEM engine manufacturers measure water pressure in different
areas of the motor. This number may not be telling you the real story of water flow. Your water pressure can be
constant from the first day you bought your new boat.
The danger may be lurking in the water flow which could be caused by:
- a plugged heat exchanger
- extensive debris build-up in the intercooler or sea strainer
- a kinked hose
- worn impeller
- water pickups not collecting enough water for cooling system
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How It Works
Calibration is set at idle and at wide open throttle (WOT). This will generate the cooling system’s normal operating
range. When water flow rises or drops more than 20% from that range (regardless of RPM), it will trip the alarm illuminating the built-in LED light; an optional audible alarm may be added. The LED light shines with intensity, making it visible in direct sunlight.
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Easy to Install
Pick the size of the hose and mount the Tee in-line on the output side of a sea strainer or sea pump. The paddle wheel
sensor installs in the Tee and can be easily removed for inspection.
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Raw Water Flow System
- Kit consists of:
- 2 5/8" panel mounted gauge
- internal warning light
- bronze Tee
- PCB board
- harness
- paddlewheel
Installation Instructions
Download the Water Flow Flyer
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| Water Flow Kits |
| Base Part Number |
Tee Size |
| WFG |
+ dial color |
+ rim color |
+ rim style |
1 |
| 1.25 |
| 1.50 |
Your choice of Mega or Race rim.
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More Drive Related Products
Drive Temperature Kit
Drive Showers
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Preventive Maintenance Tips For Your Exhaust
- Flush your engines after running them in salt water, EVERY TIME, with a minimu of 15 GPM of water supplied. DO NOT raise the engine RPM above IDLE as you could damage your exhaust system.
- Pressure check your exhaust system annually as a safety precaution. This is a perfect time to change your impeller and housing for the annual maintenance program suggested by most engine manufacturers.
- If you find damage in your water pump, chances are that you will find debris in your heat exchangers as well. These need to be thoroughly flushed in both reverse and forward. If flowing water through them is difficult, we suggest taking the ends off and running wire through the exchanger tubes.
- If you notice that your exhaust system is discoloring in any area, water flow should be reviewed to make sure that adequate water VOLUME is going through the system. This can be completed simply, with a water FLOW gauge.
- It is always a good idea to look over how your boat was plumbed at the factory. Tight bent fittings, fittings under 1 1/4" ID in the water system, or reduced hoses should be replaced, as this will have an effect on the water FLOW to the system.
- If you “beach” your boat, you are at a higher risk than most for getting sand and other debris in your motor. Avoid this method of parking your boat as it could get costly for you.
- Don’t be confused by water PRESSURE, as many OEM engine manufacturers measure water pressure in different areas of the motor. This number may not be telling you the real story of water FLOW. Your water pressure can be constant from the first day you bought your new boat. The danger may be lurking in the water FLOW which could be caused by a plugged heat exchanger or kinked hose. This may be the culprit causing the good water pressure reading, when in actuality there is poor water flow.
- External water pickups are strongly suggested as a solid method of retrieving a water source for your engine and exhaust system.
Download these helpful tips from CMI
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