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jimh

Registered: 06/28/08
Posts: 2,721
Reply with quote  #1 
For my model-year 2010 E-TEC 225-HP engine, I recently collected data on the cooling system water pressure as a function of engine speed. The cooling system water pressure was measured by an electronic sensor and displayed on an I-Command gauge. The table below shows the observed cooling system water pressure in PSI, the engine temperature in degrees-Fahrenheit, and the recommended range of cooling system water pressure in PSI (taken from BRP literature):

Observed Cooling System Water Pressure
E-TEC 225

RPM     PSI RANGE   ENGINE TEMP RECOMMENDED PSI
750     3.8 - 4.4   180         3 - 5
1300    9.2 - 9.5   191         8 - 9
1300    9.0         195         8 - 9
1350    9.7         163         8 - 9
1400    9.6 - 9.8   189         8 - 9
3700    14.0        127         12 - 14
4200    13.7 - 15.4 129         13 - 15

The data show the engine cooling system was operating in the normal range, with a trend toward the high end of the recommended range.

Below is the recommended water pressure range for the 2010 E-TEC 225-HP:

Water Pressure Chart E-TEC 225 2010

RPM   PSI
Idle  3-5
1000  7-9
1500  8-10
2000  9-11
2500 10-12
3000 11-13
3500 12-14
4000 13-15
4500 14-16
5000 15-17
5500 16-18
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