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1420 engine speed verification?


 
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Dave from MN
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Joined: 19 Aug 2007
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PostPosted: Fri Dec 21, 2012 9:25 am    Post subject: 1420 engine speed verification? Reply to specific post Reply with quote

OK, as shared earlier this fall, my 1420 I purchased only shows 2300-2350 rpm"s at full throttle. It did a great job, but a little lacking in power in real heavy, corn and stalks. It is supposed to be at 2900 rpm"s under no load. Does any one have any advice on how I can check if it is actually running that slow, or if the tach could be out of calibraion.? I am assuming it IS that the engine is not running that fast, but how can I measure it?
 
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JMS/.MN
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PostPosted: Fri Dec 21, 2012 9:31 am    Post subject: Re: 1420 engine speed verification? Reply to specific post Reply with quote

There are mechanical tachs that you hold against the end of the turning shaft to measure speed. I have my Dad"s that he bought in 1948, along with the AC combine. Also an identical one from an auction box.....maybe Lufkin brand?
 
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sdc eastern ia
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PostPosted: Fri Dec 21, 2012 9:59 am    Post subject: Re: 1420 engine speed verification? Reply to specific post Reply with quote

Stewart Warner makes a good hand held tach. Check on flea bay I've seen them there.
 
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Mike Aylward
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PostPosted: Fri Dec 21, 2012 11:28 am    Post subject: Re: 1420 engine speed verification? Reply to specific post Reply with quote

In addition to what the others said you can buy a laser tach that uses magnetic strips attached to a pulley or shaft that work very well. I've seen them several places for less than $100. Mike
 
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