The Cool Swirl is designed to eliminate upper gear problems on Mercury Bravo,
Imco, Teague, Max, Konrad and other out drives. Holding less than a quart of
oil, the upper gear case of an out drive equipped with drive showers can still
exceed 300 degrees Fahrenheit with large high output engines.
Cool Swirl pulls the oil from the rear cap of the
drive, through a through-hull transom fitting into an electric gerotor pump,
which pushes the oil through a 12” water to oil cooler, then back to the top cap
where it enters the drive at 50 psi, cooling the gears and 4 different bearings
by 100 degrees. The Cool Swirl system adds
approximately 1.5 quarts of oil to your system with no effect on the drive
reservoir bottle.
The Nextel Cup Nascar rear ends run a similar system, one that
utilizes an air to oil cooler. Turning 9200 RPM for an average of 500 miles, the
gears show little wear. Actual tests run on the Cool Swirl will detail the results.
The Cool Swirl is cheap insurance against the likelihood of drive
failure under extreme conditions and staggeringly high repair costs. An optional
drive temperature gauge is available for sale for those who would like to see
the difference with their own eyes.
Test
Date: August 15, 2005
Test conducted by: “Doc”Holliday Racing, 410 N. Helena
Street, Spokane, WA 99203, 509-220-9493
Air Temperature: 90 degrees
Water
Temperature: 75 degrees
Boat: 27’ Advantage Victory
Engine: Blown 540 ci
1200 HP
Drive: Imco SC with water-cooled top cap
Without the Cool Swirl at 5500 RPM, the drive oil
temperature ran between 280 and 290 degrees. With the Cool Swirl engaged, the drive oil temperature
plummeted down to between 170 and 180 degrees, a full 100 degree drop!
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