Return to the Tractors Forum | Post a Follow-Up

Craftsman 18.5hp

Posted by ShadowTN TN (My Page) on
Mon, Jun 2, 14 at 20:32

I have a Craftsman 18.5hp mower model # 917.274641.

I have gone through 3 batteries this spring. The battery is fine for 2 mowings and then it will not start the next time I need to cut.

It appears that the battery is not charging since I have tried 3 new ones with the same results.

How can I test to see if the battery is getting charged?


Follow-Up Postings:

RE: Craftsman 18.5hp

You have a 9 AMP charge system, so IF it's working, that should be adequate.
Probably the easiest quick test is-
With the engine at low speed, turn on the headlights.
When you speed up the engine, do they get a bit brighter?
With the volt meter across the battery, take a "static" reading. It should be 12+ VDC.
Start engine. At high speed, the DC Voltage should increase to 14ish.

If you look at the schematic in the Owners Manual, you'll see a test point to check the stator output. Min 28 VAC, with the Voltage Regulator disconnected @ high engine speed.
Assuming it's not charging, you can at least tell if the stator is good.

RE: Craftsman 18.5hp

Thanks Bill ... I will see if I can follow the schematic to find the test point.


RE: Craftsman 18.5hp

Bill I did the testing as you described. The AC output from the stator was close but the DC output from the regulator was only about half of the value.

I have replaced the regulator and will give it a try again.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Tractors Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here