SF-400 D
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The Ultimate Weapon Against Saltwater Corrosion


Now the same technology used by the elite U.S. Army Rangers and U.S. Navy Seals is available to protect your marine engine.

Our patented turbine driven valve converts normal city water into high pressure pulses that blast the salt out of your engine

17 Month Cost Savings Study on Caterpillar 3126 Diesels for the U.S. Navy Found the Following:

  1. SF-500 systems will at least double the service interval of the zinc anodes. Savings:  $37,950.00 over manufacturer's projected engine life.
  1. SF-500 system will increase the life of the seawater pump by 33%.  Savings: $3,253.36 over manufacturer's projected engine life.
  1. SF-500 systems will at least double the life expectancy of the After-cooler.  Savings: $3,457.52 over manufacturer's projected engine life.
  1. SF-500 system will increase the life expectancy of the Heat exchanger by a factor of 2.    Savings: $3,583.65 over manufacturer's projected engine life.
  1. SF-500 systems will double the oil cooler service life.  Savings: $2,324.72 over manufacturer's projected engine life.
  1. SF-500 systems will double the fuel cooler service life.  Savings: $1,220.01 over manufacturer's projected engine life.
  1. SF-500 system will extend the life of the exhaust manifold to 6000 hours. Savings: $2,440.61 over manufacturer's projected engine life.



If You Own a Marine Diesel Engine - You need a SuperFlush Marine Engine Flushing and Corrosion Control System

This Engine was overheating due to the blocked cooling heat exchanger.  The fuel savings principle applies to all turbo intercooled engines.

Before - 82% Blockage at 70 Hours of Operation

After one Application of Clear Flush and 150 Additional Hours of Operation


An internal combustion engine’s power is limited by the amount of oxygen that can be forced into the cylinders.  Diesel engine designers use compressors or turbochargers to force more air into the cylinders to increase horsepower.  When the air is compressed, it is heated to nearly 400°F and then goes through an air-cooler where it is cooled back down to below 100F.

However, on engines used in salt water the heat-exchanger/cooler can become occluded (coated) with salt and calcium buildup reducing its design efficiency.

When this occurs the cylinder inlet air temperature rises.  If it rises above 100°F the fuel air ratio is affected and there isn’t sufficient oxygen to burn all the fuel.  For every degree above 100°F about 1% of fuel efficiency and power is lost.

If one is operating on a warm summer day of 90°F and the air cooler is 10% occluded then it would fail to lower the temperature as much as 15°F.  That would result in an inlet temperature of 105°F and resulting loss of 5% of the power and fuel efficiency.
Doesn’t seem like much until you consider it means the fuel costs just went up by 5, 10 or even 15% - and the boat’s range per fuel load is decreased by same % - and the stern is fouled with black soot. (What is 10% of your annual fuel bills? … $___,_____ )
The pictures show the heat exchanger before and after use of a SuperFlush* system. The blockage became so bad that it would overheat in normal use so you can only imagine the lost fuel before the SuperFlush was installed.  After the installation (and 1 time chemical treatment with FlushClear) a simple 4-minute rinse (without running the engine) after each use maintained it in the original design condition shown in the picture to the right.

The same system that permits you to flush all saltwater from the raw water side of your cooling system also permits you to winterize this system in just 4 minutes.


Costs of Factory Recommended Maintenance Caterpillar 3126 Diesel

Scheduled Service

50 Hours

250 Hours

500 Hours

1000 Hours

4000 Hours

6000 Hours

Zinc Anode Service

 $     632.50

 $    3,162.50

 $    6,325.00

 $ 12,650.00

 $   50,600.00

 $   75,900.00

Seawater Pump Service


 $       406.67

 $       813.34

 $   1,626.68

 $     6,506.72

 $     9,760.08

After-Cooler Service


 $       350.00

 $       700.00

 $   2,771.68

 $     4,843.36

 $     6,915.04

Heat Exchanger Service


 $       350.00

 $       700.00

 $   2,855.77

 $     5,011.54

 $     7,167.31

Oil Cooler Service


 $       350.00

 $       700.00

 $   2,028.48

 $     3,356.96

 $     4,685.44

Fuel Cooler Service


 $       350.00

 $       700.00

 $   1,486.24

 $     2,272.48

 $     3,058.72

Exhaust Elbow Service




 $      813.34

 $     1,626.68

 $     2,440.02

Cumulative Totals

 $     632.50

 $    4,969.17

 $    9,938.34

 $ 24,232.19

 $   74,217.74

 $ 109,926.61

The above chart shows the cumulative cost of doing all the maintenance recommended by the manufacturer on their 3126 diesel engine.  Projected maintenance savings realized by using the SuperFlush system over the life of a single Caterpillar 3126 diesel engine is in excess of $50,000.00.

For full text of results of U.S. Navy Study click here.

For additional information read

SF-500 HPD Installation Instructions

Frequently Asked Questions,

call 800-861-8786 or Contact Us by e-mail.


*SuperFlush is also referred to as: super flush, motor flusher, QYSA, QYSA SuperFlush, QYSA super flush, marine motor flusher, outboard motor flusher, boat motor flusher, io engine flushing, marine engine flushing kit, and it replaces Johnson outboard motor flusher, evinrude 225 engine flushing, yamaha flusher outboard, Guardian, Perko, MST Guardian, ThoroFlush, MACS, Flush-Pro

**Corrosion refers to marine saltwater corrosion and saltwater marine corrosion control


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