Tach Sensor...

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Rich (P303)

Rich (P303)

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Jun 1, 2005
772
Pearson 303 Robinhood, ME
I need to replace my Yanmar tach sensor (1984) into the transmission. Previous one does not have any identification to what wires go where. Two leeds to the sensor... unmarked. I assume it makes no difference as, I am just completing a circuit... or am I missing something?
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
Rich, I think

The sensor just counts teeth if it's like mine. First guess would be that it doesn't matter either way. Second guess is if it doesn't work, just switch the wires. And remember, I can't possibly be wrong, because I am just guessing anyway.
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
I checked the manual

I looked at the manual, and it shows for the GM series of engines color coded wires to the sensor. Orange and a blue/red. So maybe it does make a difference, but switching should make an error easy to fix.
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
If you hook it up backwards

it will read -rpm, violating the space-time continuim *yks but seriously, here's a diagram. check chapter 5. Tim
 
Rich (P303)

Rich (P303)

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Jun 1, 2005
772
Pearson 303 Robinhood, ME
Tim... NiceNEasy...

Tim... I have the book... it is for mechanics (not me). I am not about the time-continuim... that would be RichW. However I did enjoy "Back to the Future". NiceNEasy... You are correct... it just counts teeth. Wire colors are correct! There is no way on the sensor to tell which goes where. The worst that could happen... the tach would go backwards... and I wouldn't burn any fuel? But would be out $110.
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
Oops, I meant chapter 10,

page 2, if you look at the diagram it shows a W and a G on the sender and the tach, with a blue wire to the g terminal and an orange wire to the w terminal, but on a 2 wire sensor all it is is a coil of wire around a magnet to pick up the tach signal and it doesn't matter which way it is wired. Tim
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
If hooking it up backwards

If hooking it up backwards makes it burn no fuel, please post up. There are probably others, besides myself, who will be switching some wires.
 
Rich (P303)

Rich (P303)

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Jun 1, 2005
772
Pearson 303 Robinhood, ME
That is what I figured...

Timo42. I am not a whiz when it comes to electricity. All I know is... that electricity does not care what color the wires are!
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
The most important thing...

is to keep the smoke inside the wires, that is how electricity works, if you let the smoke out, it stops working. ;D Tim
 
GuyT

GuyT

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May 8, 2007
406
Hunter 34 South Amboy, NJ
Timo42

Where did you get the .pdf version of the manual. Its great!
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
Google

is a wonderful thing, i am going to save this myself for when I get a bigger boat. :) Tim
 
Rich (P303)

Rich (P303)

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Jun 1, 2005
772
Pearson 303 Robinhood, ME
So when...

the smoke starts to leak out of the wires... the most prudent thing to do would be to apply some of that shrink tubing in the effected area?
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
No!!! you have to reintroduce the smoke first.

I think you can use the Lucas kit. ;D
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
Timo42

What British stuff have you owned in the past to be familiar with Lucas, the inventor of darkness??
 
Timo42

Timo42

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Mar 26, 2007
1,042
Venture 22 Marina del Rey
BSA 441VS,

Norton 850, and my wife owns a 61 Nash Metro that she reluctantly allows me to maintain ;D I may be a GM world class technician at work, but that's her baby. Tim
 
sailaway78

sailaway78

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May 11, 2005
3,431
Seidelman S37 Slidell, La.
Was just curious

Not too many around familiar with the older Lucas electrics. Many, many years ago I was the service mgr. in a Triumph dealership. Before they went to the unit construction motors there were two givens with the Triumph. They WOULD leak oil, and the electrics WOULD quit working. Usually sooner than later. One of the big rules in the dealership, was not to service a new bike, until it was sold, and ready to head out the door. Only way to avoid the oil spots. After they went to the unit construction motors, the oil leaks were a lot better, but not the electrics.
 
RAD

RAD

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Jun 3, 2004
2,330
Catalina 30 Bay Shore, N.Y.
I had a 650 Triumph Bonneville

and the electrics worked fine but I do remember the oil leaks,gave the bike to a friend and he gave it to his kid who rebuilt it and its still around somewhere up state NY last I heard
 
Don-MT

Don-MT

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May 21, 2004
67
Oday 23 Montana
Oh, The Memories :)

I had a mid-60’s Bonneville Triumph. Gears on the right, brake on the left. Damn near killed myself with in the first block after I bought it. Oil leaks? Just wear boots, no problem. Electrical system? Problem. Carburetors? Problem. Kick in the head to ride? Yeah. Chick magnet? Oh yeah! *yks Shine On! Don
 
bill@tahoe

bill@tahoe

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Oct 26, 2007
41
Macgregor M26 Lake Tahoe
old english bikes

I had a 59 Ariel square 4, back in the 60s, FAST, a little seapage, with shifter on right, and brake on left, had some close calls untill I got use to it. Have a 99 Honda Valkryie now, Flat 6, 1520 cc's really fast, and love it.
 
Rich (P303)

Rich (P303)

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Jun 1, 2005
772
Pearson 303 Robinhood, ME
I had a Triumph

TR6... it was a piece of cr*p. Then I got a Triumph TR7... it was still a piece of cr*p. Then I got a "Rambler Classic"... front seats folded down... it was a chick magnet!
 
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