30 johnson - tach model

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jakeboomer

Cadet
Joined
Nov 16, 2004
Messages
19
Hello,<br /><br />I know this has been beat to death, but I am confused with which tiny tach to purchase for my 1996 30 HP - 2 Stroke, 2 cylinder. I researched this site for an hour, and was convinced I needed the 1C (fire every 180 degrees of rotation), but to be sure I called Tiny Tach. The lady said "Umm, it's the 2C." She sounded like the receptionist. <br /><br />Anyways, I don't want order the wrong model, and I know many people own 2 Cylinder 25-30HP 2-strokes. So I was hoping for a safe answer from somebody who's purchased one.<br /><br />Thanks so much for your input. Sorry to beat a dead horse.<br /><br />Thanks<br />Jboomer
 
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martinphantom

Seaman Apprentice
Joined
Jul 12, 2005
Messages
47
Re: 30 johnson - tach model

I'm curious myself(25hp johnson 86 model) as I'm thinkin bout installing one myself. Lookin on Ebay I found tachs for model airplanes and was curious if they would possibly work?????
 
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blackwaterstout

Petty Officer 2nd Class
Joined
Aug 28, 2005
Messages
146
Re: 30 johnson - tach model

This is a question I've asked in the past too without real definitive answers. I'd rather have an analog tach but can't seem to find information on how to hook one to my '79 Johnson 25. The only thing I don't like about the tiny tach is that the battery is not replaceable so after 5 years you'll have to buy another.<br /><br />As for the model airplane tach forget about it. I've been flying RC airplanes for several years now and those tachs won't work. They are hand held and you hold them in front of a moving properllor just long enough to check your rpms. After that you turn them off and throw them in your field box. They have no wiring what-so-ever.
 
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ob15

Chief Petty Officer
Joined
Jan 4, 2004
Messages
514
Re: 30 johnson - tach model

Either one of the tiny tachs will work. The 2C would attach to 1 plug wire. The 1C would attach to both plug wires (assuming a 2 cyl motor). When I got mine I talked to someone & they suggested the 1C becuase he felt it would be better reading 2 pulses. He said the 2C could sometimes get interference from the other unused plug wire & get bad readings.<br /><br />BTW, I think they are great. You really know for sure what your rpm's are (to 10 rpm's)
 
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ob15

Chief Petty Officer
Joined
Jan 4, 2004
Messages
514
Re: 30 johnson - tach model

Used some 5200 & glued right on top of the round tach in my instument cluster.
 
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