B48 starting problems
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Glenn,
Do you already have a starter improvement kit on this tractor? Has the ignition switch ever been replaced or is it original? Also, since it is a B Series engine with separate solenoid...it could be the solenoid is failing and needs to be replaced.
For hard starting issues ALWAYS start with cleaning the battery cable connections (lead oxide is nearly invisible and a good insulator, so scrape with a knife or use a very stiff wire brush...) Also, check the ground connections on the engine and frame for any voltage drop due to poor connection.
Chuck
Do you already have a starter improvement kit on this tractor? Has the ignition switch ever been replaced or is it original? Also, since it is a B Series engine with separate solenoid...it could be the solenoid is failing and needs to be replaced.
For hard starting issues ALWAYS start with cleaning the battery cable connections (lead oxide is nearly invisible and a good insulator, so scrape with a knife or use a very stiff wire brush...) Also, check the ground connections on the engine and frame for any voltage drop due to poor connection.
Chuck
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Glen,
If the key switch is original to the tractor I am sure that you should replace it...and clean the contacts of the mating connector, looking carefully for heat and corrosion damage. The B series solenoids are on the pedestal wall, and can be tested as seen here:
B-series solenoid test from 318 Tm1590.pdf (23.5 k)
Chuck
If the key switch is original to the tractor I am sure that you should replace it...and clean the contacts of the mating connector, looking carefully for heat and corrosion damage. The B series solenoids are on the pedestal wall, and can be tested as seen here:
B-series solenoid test from 318 Tm1590.pdf (23.5 k) Chuck
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1,001 Posts
Hello Glen
Follow what Chuck has said here, Plus check the starter Improvement Relay it may be bad. I had to Place a starter Improvement Kit on my Son in Law's Model 316 as all it would do is click after Placing a new Ignition switch it did not help. I hope this help's, Kurt
Follow what Chuck has said here, Plus check the starter Improvement Relay it may be bad. I had to Place a starter Improvement Kit on my Son in Law's Model 316 as all it would do is click after Placing a new Ignition switch it did not help. I hope this help's, Kurt
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5,084 Posts
pull air cleaner off and see if you can turn the fly wheel from the opening where timing marks are with a screw driver
just to be sure engine can turn and starter is not bound to flywheel
just to be sure engine can turn and starter is not bound to flywheel
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might have to pull motor and take out starter
Hopefully you have went over all connections from battery terms and to solenoid and starter to rule that out.
I would like to think jumping it would have turned it over
Hopefully you have went over all connections from battery terms and to solenoid and starter to rule that out.
I would like to think jumping it would have turned it over
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Glenn,
I will ask a few more questions because I want to be sure I am not missing something here. You say that when you jump the starter the engine does not get cranked...but does the starter motor spin? Or, does it not turn at all but draw enough current to cause the sparking you noted?
In your post #543 above you mention that the battery measures 12.7 -- and I am sure that you meant Volts, not amps... Presumably this is when the starter is not being jumped. What is the battery voltage during the time the starter motor is powered during the jump? It should be well above 11 volts for a good battery, but under 10 volts during such a load would indicate that the battery is at its end of life, or at least not fully charged.
From all your descriptions, it sounds like the starter itself is in need of a rebuild, but you will have to take it out and to a shop to know for sure...
Chuck
I will ask a few more questions because I want to be sure I am not missing something here. You say that when you jump the starter the engine does not get cranked...but does the starter motor spin? Or, does it not turn at all but draw enough current to cause the sparking you noted?
In your post #543 above you mention that the battery measures 12.7 -- and I am sure that you meant Volts, not amps... Presumably this is when the starter is not being jumped. What is the battery voltage during the time the starter motor is powered during the jump? It should be well above 11 volts for a good battery, but under 10 volts during such a load would indicate that the battery is at its end of life, or at least not fully charged.
From all your descriptions, it sounds like the starter itself is in need of a rebuild, but you will have to take it out and to a shop to know for sure...
Chuck
Chuck, I had a trickle charge on the battery through the night. It now shows 13.7 volts. Still no starter action when jumping the solenoid.
I also tried to jump it to the battery with cables from my car. Still just get the one click.
Starter? The battery is < 6mos old. If I trickle charge it over night, will that confirm its a problem with the starter?
The volts drop to about 12.5v when I jump the solenoid. Should I put my car battery in to just be sure?
I also tried to jump it to the battery with cables from my car. Still just get the one click.
Starter? The battery is < 6mos old. If I trickle charge it over night, will that confirm its a problem with the starter?
The volts drop to about 12.5v when I jump the solenoid. Should I put my car battery in to just be sure?
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sounds like the starter itself is faulty
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yes pulling starter would be next step IMO
there are starter and alternator repair shops in many places that might be able to rebuild it
or you can buy one from deere or even ebay
there are starter and alternator repair shops in many places that might be able to rebuild it
or you can buy one from deere or even ebay
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you can try it but sometimes the comutator needs to be resurfaced where the brushes make contact
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Yes -- stay away from the after-market starters from China...many posts here about how unsatisfactory they are compared to the original.
A good shop should be able to rebuild the one you have for about the same cost as those cheap imports that only last a season or less...
Chuck
A good shop should be able to rebuild the one you have for about the same cost as those cheap imports that only last a season or less...
Chuck
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Hello Glen
get a Holed of Robert Kummer his site name is Boomer he will have an Original Onan starter for you at a reasonable sum. Here is his E-mail Link. I hope this help's, Kurt
http://boomersonanparts.com/
get a Holed of Robert Kummer his site name is Boomer he will have an Original Onan starter for you at a reasonable sum. Here is his E-mail Link. I hope this help's, Kurt
http://boomersonanparts.com/
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