Tach pulse setting
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Tach pulse setting| bmuone |
Posted: November 02, 2009 09:23 pm
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Member  Group: Members Posts: 59 Member No.: 710 Joined: September 09, 2008  |
I have read the previous post on tachometers and settings. I could not find the answer to the question I have. I have a 417A (31-17KE02). I have a old sears marine universal tachometer. It is old but never been used. Inside the tach there is a setting switch with numbers 1 through 5. Which setting should I use?
 Tks....Dayton |
 
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| bitten |
Posted: November 03, 2009 04:35 am
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Senior Member Group: Members Posts: 688 Member No.: 732 Joined: September 18, 2008 |
Dayton
Im not sure but I think the settings are for how many cylinders you have. -------------------- Bitten by the Wheel Horse bug
Kenton, Ohio |
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| sorekiwi |
Posted: November 03, 2009 07:17 am
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 Senior Member Group: Members Posts: 938 Member No.: 39 Joined: September 10, 2007 |
I've never had any luck getting an electric tach to work on any small engine.
I use a "Vibratach" which is a mechanical device that measures the frequency of the vibration and gives you a reading. It works great! There are some threads about them here too. -------------------- Mike (Kiwi) now in NE Ohio
1962 502 (now a 702!!) 1963 33E Lawn Ranger 1964 654 1966 1276 1968 500 Special 1973 14hp Hydro 1975 B80 1992 520H |
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| bmuone |
Posted: November 03, 2009 09:53 am
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Member Group: Members Posts: 59 Member No.: 710 Joined: September 09, 2008 |
Thank you fellers. I guess I will go scientific. I'll try all settings and see if any seem about right to fit the sound. I overhauled the carb is why I was trying this tach out. I have it running pretty clean but did not want to over rev it. I'll let you know. Have a good day.......Dayton
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| sorekiwi |
Posted: November 03, 2009 11:44 am
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Senior Member Group: Members Posts: 938 Member No.: 39 Joined: September 10, 2007 |
Just something to keep in mind...
Some (all??) Tecumsehs fire the coil on every revolution, (I think Onans too  ), Kohler K's fire every second revolution like normal.Let us know how you get on, and if you need to do any math to get a good number! -------------------- Mike (Kiwi) now in NE Ohio
1962 502 (now a 702!!) 1963 33E Lawn Ranger 1964 654 1966 1276 1968 500 Special 1973 14hp Hydro 1975 B80 1992 520H |
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| bmuone |
Posted: November 03, 2009 02:35 pm
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Member Group: Members Posts: 59 Member No.: 710 Joined: September 09, 2008 |
Well I plugged in to the number 2 setting and the idle was perfect at 1200. The high side ran up to 2000 before I chickened out and pulled back. So I think I still have a little fine tuning to do. But right now gotta clean up and get ready for a one year old dude. Poppy gotta be the only baby sitter this afternoon.
 Check ya later......Dayton |
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