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OHM Reading

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Can anyone tell me what the OHM reading should be for a catalytic converter sensor  Thanks!!  (340 Indmar monsoon engine MEFI)

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What year is your boat?

Are you checking the sensor or trying to bypass the sensor with a resistor?

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I don't know what MEFI you have, but here is a place to download the Indmar MEFI 6 manual.


On page 9-123 (pdf page 169) the mV output of the O2 sensors are explained along with diagnostic and repair procedures.  The MEFI 5 manual can be found in a sticky on this forum as well.

If you are looking for the expected ohms of the post catalyst exhaust temperature sensor used in 2008 it is 470 ohms.

Edited by csleaver
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