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ContinuousWave: Small Boat Electrical
posted 03-22-2010 02:01 PM ET (US)
There is a diode in the kill circuit of my motor (E225cxcce).
This diode has failed. I am wondering if anyone here could tell me from the markings what a suitable replacement would be. The diode has DII J10 printed on it.
I have ordered a new switch and the harness that contains the diode. I just thought that if I can find a replacement diode I would repair the old harness for a spare.
posted 03-22-2010 08:28 PM ET (US)
You might give Radio Shack a try.
posted 03-22-2010 10:08 PM ET (US)
The diode is likely just in the circuit as a steering diode.
In a kill circuit the voltages can be quite high, on the order of several hundred volts. The diode should be capable of tolerating reverse-bias with those voltages. A diode with a peak inverse voltage (PIV) of 1,000-volts should be reasonable.
The current is unknown to me. I would look for a diode with a rating of at least 3-amperes.
posted 03-23-2010 05:49 AM ET (US)
Thanks for the replies
posted 03-23-2010 06:35 AM ET (US)
The wiring harness diode is a replaceable part, see your dealer or check the online parts list at the Evinrude website.
posted 03-23-2010 07:05 AM ET (US)
The diode is not listed in the late model parts books, but it is in earlier books under part no. 583898
posted 03-23-2010 02:24 PM ET (US)
You would be pretty safe if you sized the current rating as the current carrying capacity of the wire it is attached to. I suspect that this would be overkill if it is in a power circuit and way overkill if it is in a signal circuit.
Diodes are pretty cheap so be conservative.
posted 03-24-2010 07:50 AM ET (US)
Thanks again guys
The part seahorse has mentioned seems to be part of a different wire harness unless the parts diagrams that I am using are incorrect. I will continue researching this and replace the diode for a spare. The depth of knowledge and willingness to help people out here on this site astounds me.
posted 03-24-2010 04:49 PM ET (US)
that diode is used in the engine wiring harness on some motors to isolate the warning systems, plus it is also used in the safety circuit on older twin engine rigs that use the single kill-switch panel.
posted 03-25-2010 08:41 AM ET (US)
Does the diode look like this?
These are 1A generic industry parts.
The body size of the part relates to current carrying ability. For example, the part above is a 1A part while the following is a 3A part:
posted 03-25-2010 09:14 AM ET (US)
Dave the diode looks like the ones pictured. I was curious if the markings on the one in my boat could be read to give the electrical spec for the part so a suitable replacement could be found.
posted 03-25-2010 09:53 AM ET (US)
The markings should reveal the product type unless they were purchased to a custom specification. For a low cost component like this that would be unlikely. There should be a JEDEC type number on the part like "1N4000".
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