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Old 03-22-2013, 06:35 AM
Mark rsa2au's Avatar
Mark rsa2au Mark rsa2au is offline
TT Enthusiast
 
Join Date: Mar 2013
Boat: Mastercraft X5 2001. 310hp preditor
Location: Australia
Posts: 182
Had the ECT available. Measured the resistance as below. Tested using steamer from my coffee machine, and the milk thermometer (dont tell SHMBO), reasonable accuracy I suppose.

The numbers seem to go in the right direction, and if the thermometer is out a little I am happy as this test shows that at opperating temp of 70degC/160F the resistance is about right at 320 which is lower than the 467 recommended. Therefore the ECM is getting the message that the engine is hot!

degC degF Ohms
90 194 241 - Mine = 198
80 176 332 - Mine = 234
70 158 467 - Mine = 320
60 140 667 - Mine = 480
50 122 973 - mine=730
40 104 1459 - Mine=1050
30 86 2238 - mine=1790
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