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pfrederi

Stator output test woes....

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pfrederi

It is a bit early in the day and liquor stores on Pennsylvania are closed but I may start drinking right now!!!  I have been working for the last few weeks on my GT-14.  Fixed the hydro units acceleration springs resurface the slippers, the piston block and the pump base.  Had the engine to machine shop for a 10 over and under.  Would start sporadically and not run really well.  as I posted before the cheap harbor freight spark plug tester showed spark but after much messing around i dug out the Briggs & Stratton tester and it didn't show spark I swapped  out the  breakerless coil, trigger and stator no fix.  Converted her to a battery points system it started and ran!!!!  I had not wired in the voltage regulator as it was some cobbled up job but I tested the stator output got  5 to 7 volts AC  Wrong answer.  Swapped out 3 different stators couldn't get to 10 volts.  Tested with two different digital VOMs that have worked reliably.  Swapped out the flywheel with a spare that was missing 2 fins thinking weak magnets...(Techumseh has a test for magnets couldn't find one for Kohler)..  Still 6-8 volts AC  I have gotten really proficient at pulling the shroud popping off the flywheel etc  but now I was at wits end. Multiple swaps of all parts involved and no good answer.  Out of desperation (no other Ideas) I dug out an old Sears analog meter.  It showed 30 volts AC.  Bad testing gear has caused me a lot of work and frustration.  Guess digital doesn't like the AC pulses produced by a 10 amp stator

 

Any recommendations for a source and model of a Fluke analog meter??

 

 

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Achto
41 minutes ago, pfrederi said:

Guess digital doesn't like the AC pulses produced by a 10 amp stator

 

That is really strange. I have never had this issue. I use either my Blue Point or a Fluke model 83V, both digital.

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pfrederi
15 minutes ago, Achto said:

 

That is really strange. I have never had this issue. I use either my Blue Point or a Fluke model 83V, both digital.

I don't recall this issue before either but they may have been 15 amp systems.  I wonder if the difference in the number  of poles for 10 and 15 amp make a difference

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Achto
8 minutes ago, pfrederi said:

I wonder if the difference in the number  of poles for 10 and 15 amp make a difference

 

This possible, it might put the frequency out of range for the meter. I wouldn't think that that would matter though. You don't happen to know how many poles on the two different stators?

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pfrederi

15 amp stator has 18 poles.  the 10 amp has 12 however on the breakerless ones 1 of the poles is used for the ignition not the charging...(I think)

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lynnmor
1 hour ago, pfrederi said:

Out of desperation (no other Ideas) I dug out an old Sears analog meter.  It showed 30 volts AC.  Bad testing gear has caused me a lot of work and frustration.  Guess digital doesn't like the AC pulses produced by a 10 amp stator

 

Any recommendations for a source and model of a Fluke analog meter??

 

This has been mentioned several times on the forum.  You have a Sears meter that works and there is no need for a Fluke.  The AC voltage will vary by engine speed and all you need to know is that the AC voltage is much higher than 12.

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Achto
15 minutes ago, pfrederi said:

15 amp stator has 18 poles.  the 10 amp has 12

 

Given these numbers the frequency of a 15amp should be much higher than a 10amp.:confusion-confused:Still confused.

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pfrederi

Not a good day.  I may have miss read the analog meter.  it had a range doubler switch I may have had on.  Back to about 10 volts ac on the meter.  So if it isn't a meter  (or operator issue) what am I missing.  Have used different stators all of which pass the resistance and open tests in the manual.  even swapped eh flyweel can't get the voltage up....

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squonk

I have had multiple tractors and using multiple digital meters from HF to Fluke, bring bad results. Inaccurate readings  or readings jumping so fast you can't read them. I bought a Simpson analog off of E bay just for working on tractors. I have even had issues with Fluke and Fieldpiece meters picking up harmonics from motor speed drives. Electromotive waves can raise havoc. Even eat motor bearings. 

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kasey54

Much has been typed in these posts. T00 much for me to unravel. Here's what happened to me. I read 14 volts at the two ac leads from the stator , prior to the rectifier/reg. Based on looking for a min. of 30 ac volts . I didn't check for  + DC  from the 3rd wire on the reg. Someone else on here posted they only had a similar ac out, and it worked fine. So I checked and had no dc from bat. to reg. I had a bad fuse holder and no dc to the reg. from the battery. With the fuse holder fixed my system is fine. Maybe you have enough ac. I haven't been able to determine the minimum ac required , maybe my HF meter cant read the stator volts accurately, I just don't know. I do know you need dc to the center post of the reg. Hope something helpful is in this. 

 My finger is sore from typing. Good luck.

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