Tuš za hlađenje ulja kućišta pogonske noge Mercruiser BRAVO

Pregrijavanja Z pogona BRAVo je izrazito kod plovila u komercijalnoj upotrebi sa velikim brojem radnih sati i velikim opterećenjima. Gornji dio kućišta pogona BRAVO se nalazi iznad površine vode i dolazi do pregrijavanja ulja što za posljedicu uništava konus mjenjača i zupčanike.
Montažom tuša hlađenja morska voda kontinuirano za vrijeme plovidbe zalijeva kućište pogona i hladi za čak do 20C stupnjeva pogonsku nogu čime značajno produljujete radni vijek i smanjujete mogućnost havarije na pogonu plovila.

Product Reviews
Our product was tested by Hot Boat and DockSide Magazine, and found that applying the Simrek Multi-Port Drive Showers, the temperature of the drive oil was indeed significantly decrease.

Installing a Drive Shower, Hot Boat Magazine
By Jim Wilkes
“The 45 degree pick up ports that all manufactures of drive coolers are using today, will fail to provide cooling water when the drive is trimmed outwardly. Results from the Multiport Drive Showers Test: 50 degree drop in operating temperature at all trim levels.“

Take a Cool Shower, Dockside Magazine
By John Barr, technical writer for Boating and Dockside Magazines
“Test Results: Temperature reduction from a Summit on an Alpha I of 50 degrees (237 to 187)" ”

Shower Time, Hot Boat Magazine
By Jim Wilkes
“heat kills, adding a Drive Shower can add extra life to your outdrive.”

Cool Running
As seen in the May 2003 issue of Family and Performance Boating Magazine
“Multiport Drive Shower could save you big bucks”

Do I Need a Drive Shower to Cool My Drive?
As seen in Hot Boat Magazine
“Others claim to be the best, independent tests proves otherwise”

Hit the Showers, Powerboat Magazine
By Jim Gorant, Powerboat Magazine
“A Bravo drive will give you hot performance--if you keep it cool.”

WAY TO COOL - As seen in Poker Runs of America Magazine
by Peter Tasler
“Simrek, for one, has an excellent track record.”

The Physics Behind a Stern Drive Cooling System
Where does the heat come from?
Before you can begin to design a stern drive cooling system, you first have to understand what is causing the heat. There are many heat sources including clutches and universal joints, but most of the heat is caused by the bearings which allow the shafts to spin. On the top half of the drive, there are two main bearings, one at the front, and one at the top. They share an equal load with one exception; depending on the type of drive you have, the front bearing is spinning 1.5 times faster for most Bravo 1s, and 1.83 times faster for Bravo 3s. Most of the heat generated by a stern drive comes from the FRONT Bearing. This led us at Simrek to ask, if the front bearing is responsible for generating 1.5 to 1.83 times the amount of heat of the top bearing, why do most drive cooler manufacturers target the top bearing cap? This increased RPM, along with the amount of extra components that it takes to spin a second propeller in the opposite direction is why the Bravo 3 is the hottest running drive in the MerCruiser line up.
What should be cooled and why?
The component inside the stern drive that is most susceptible to abuse from heat is the oil. It begins to break down at about 300 degrees. The metal components inside the drive can reach temperatures of at least three times that amount before they become affected. The only way the drive components can reach those temperatures is if the oil has broken down and the heat generating friction builds up. If you cool the oil and keep it from breaking down, it will cool and protect the components inside the drive.
What is the best way to cool the drive oil?
If you wanted to boil water in a pot, would you rather use a pot that is one inch thick or 1/8 of an inch thick. Obviously the water would be heated much faster in the thinner pot. The same principals are true when it comes to cooling something. The top bearing cap is over an inch thick, the sides of the drive are less than 1/8th of an inch thick. The thinner the material, the easier it is to wick the temperature of the drive oil inside through the casing. So the most efficient cooling system would be one that targets the sides of the drive. So, why do most drive cooler manufacturers target the top bearing cap? The other component that is critical for cooling the drive is the amount of water the system can process and apply to the drive casing on a continuous basis.