Searching For Joe Reeves

Joined
Oct 2, 2005
Messages
18
This is posted from the Subject Tachometer! <br />Well I called the local Evinrude dealer and asked them what POLE my engine was because I need to get a tach, he said he doesnt know. You believe that crap, he said the manual says something about 5 but it doesnt say 5 Pole. Any clues? Its a 1995 2Stroke 25hp! Thanks in advance for any help!
 

duke3

Petty Officer 2nd Class
Joined
Jun 30, 2005
Messages
108
Re: Searching For Joe Reeves

Hello Flippyaforeal.<br />Evinrude / Johnson (OMC), 2 cyl. and 2-stroke have 10 poles. So your tach should be set to 5P.<br />If your tach is not original OMC, and the settings behind the tach is "cyl". Then be sure that the tach hase settings for 2 and 4 cyl.<br />Try then both of them (2 and 4 cyl), and see what position there will fit for your motor.<br />IMPORTENT: Not all tach (non-original) will do, even if they have the right settings !!!!!
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: Searching For Joe Reeves

By now, you are most likely aware that I answered your email. A copy of what I had to say follows:<br /><br />I retired some years before that engine came into existence and am unfamiliar with its circuitry, however the following may be of some help to you.<br /><br />- - - - -<br />This pertains to the engines where the rectifier has a Yellow/Gray wire, a Yellow wire, and a Red wire...... or two Yellow wires and a Red wire. Normally this indicates a 6 pulse output alternator which would require a six (6) pulse tachometer.<br /> <br />However, the usual settings for the tachometer pertains to the pulse output of the alternator..... and that is usually six (6) pulses. In which case the dial on the tach should be set to number six (6).<br />- - - - -<br /> <br />If on the other hand, the rectifier has a Yellow/Gray wire, a Yellow wire, a Yellow/Blue wire and a Red wire, that usually indicates that the alternator pulse output is five (5) pulses, in which case the engine requires a five (5) pulse tachometer and the dial (if it exists) should be set to five (5).<br /> <br />- - - - -<br /> <br />Hope this has been of some help to you. What does your service manual have to say about the tachometer or stator/alternator setup?
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: Searching For Joe Reeves

actually its 1yellow,1yellow/gray and a red is 12pole/6pulse, 1 yellow,1yellow/blue ,1yellow/gray and a red is 10 pole/5 pulse. an easy way is if its a 3 wire rectifier its 12 pole and if its a 4 wire rectifier its 10 pole. pulses are 1/2 poles.
 
Joined
Oct 2, 2005
Messages
18
Re: Searching For Joe Reeves

Thanks everyone! Found out my motor is a 10 Pole 5 Pulse, and that is rare according to the Tach sales guy! Wish me luck!
 

eli_lilly

Chief Petty Officer
Joined
Dec 22, 2005
Messages
435
Re: Searching For Joe Reeves

actually its 1yellow,1yellow/gray and a red is 12pole/6pulse, 1 yellow,1yellow/blue ,1yellow/gray and a red is 10 pole/5 pulse. an easy way is if its a 3 wire rectifier its 12 pole and if its a 4 wire rectifier its 10 pole. pulses are 1/2 poles.

Thank god for this ancient post, Rodbolt. I have a 1984 or 1985 (no markings +anywhere+) Johnson 90 for which the 6 pole setting gives insanely low tach readings so I have been using it for nearly a year with the tach set at 5p. Looking at the rectifier, it's a four wire whose colors match as above, which would seem to indicate that 5p is correct.

It sucks that the thread has such a stupid subject "searching for joe reeves", it would make it easier for others to find if it were more appropriately titled.

-E
 
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