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rpm's


 
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hoipigeons
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Joined: 18 Oct 2015
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PostPosted: Tue Aug 13, 2019 6:00 pm    Post subject: rpm's Reply to specific post Reply with quote

I've reached the stage in which I need to know the rpms to correctly set my idle,etc. What is the best option for a home garage shop to test the rpm speed? This is my first time doing this, but it won't be the last. I have 4 G's to restore eventually. ('38,'45GM,'49,and a 1950 that I'm either going to keep, sell, or strip down for parts. Thanks in advance!!
 
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craigco
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PostPosted: Wed Aug 14, 2019 2:22 am    Post subject: Re: rpm's Reply to specific post Reply with quote

A hand held tachometer. There are electric hand held tachs that use tape to read rpms. Or mechanical ones you hold on the end of shafts or pulleys.
 
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buickanddeere
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PostPosted: Wed Aug 14, 2019 4:16 am    Post subject: Re: rpm's Reply to specific post Reply with quote

CVPost-hoipigeons wrote:
(quoted from post at 22:00:06 08/13/19) I've reached the stage in which I need to know the rpms to correctly set my idle,etc. What is the best option for a home garage shop to test the rpm speed? This is my first time doing this, but it won't be the last. I have 4 G's to restore eventually. ('38,'45GM,'49,and a 1950 that I'm either going to keep, sell, or strip down for parts. Thanks in advance!!


The rpms are listed in the operator s and service manuals . You were not planning on "restoring" the tractors without the information in the service manual were you ? 1-800-522-7438.
I use a laser tachometer .
 
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hoipigeons
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PostPosted: Wed Aug 14, 2019 4:52 am    Post subject: Re: rpm's Reply to specific post Reply with quote

My IT shop and service manual says I should set that at 1115 rpm. There's pretty much no other way to guesstimate the speed is there. Is there??? I'm sure that there are different laser tachs price wise. Advance Auto Parts (just the first place I looked) wants $100.
 
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JDEM
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PostPosted: Sat Aug 17, 2019 5:48 pm    Post subject: Re: rpm's Reply to specific post Reply with quote

Hand-held vibration tach might be all you need. No electricity and never has to touch the engine. I have several around that used to cost $5 each. Now close to $20. Made for small engines but will work on anything as long as it can sense vibration. They are still made by the same company in Germany as the ones I bought 50 years ago. Nothing to go wrong with them unless left on the floor and driven over by a tractor (did that to one).



 
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DR. EVIL
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PostPosted: Thu Aug 22, 2019 10:06 am    Post subject: Re: rpm's Reply to specific post Reply with quote

Do a GOOGLE SEARCH on your computer. Harbor Freight has one for $37.99, Wal-Mart one for $10.99, E-Bay one for $9.99, and keep in mind, they are very sensitive to ignition interference, had a better one fail after I set the fast and low idle speed on two Cub Cadets, those Kohler engines have terrible interference in their ignition systems. John Deere has too I bet.
 
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