Onan twin CCK not charging

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   Working with an AC 720. It has an Onan CCK engine. It's only putting out about 5.5VDC. Is this the alternator/generator done for or should I be looking elsewhere?

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Heliarc Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 23 Jun 2019 Location: Shickshinny PA Points: 27	Post Options Post Reply Quote Heliarc Report Post Thanks(0) Quote Reply Topic: Onan twin CCK not charging Posted: 06 May 2025 at 1:08pm
	Working with an AC 720. It has an Onan CCK engine. It's only putting out about 5.5VDC. Is this the alternator/generator done for or should I be looking elsewhere?

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den/southern illinoi Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Sparta, Illinoi Points: 2061	Post Options Post Reply Quote den/southern illinoi Report Post Thanks(0) Quote Reply Posted: 06 May 2025 at 2:51pm
	I do not know the answer to your question but was told where you can get new stators for these engines if it comes to that. If so, message me and I will get you the info.
	Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts.

Heliarc Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 23 Jun 2019 Location: Shickshinny PA Points: 27	Post Options Post Reply Quote Heliarc Report Post Thanks(0) Quote Reply Posted: 19 hours 32 minutes ago at 6:31am
	Understood. Looks like if I want to do the stator, ring with coils?? I'd be pulling the engine. Trying to start cheap and easy before I do all that.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85776	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 6 hours 34 minutes ago at 7:29pm
	does yours have a 3 wire regulator on the stator output ? ---------------- GOOGLE----- The first thing to do is to check the charging fuse and make sure it is not blown. If the fuse is good, locate the voltage regulator on the engine, near the starter. It is a small aluminum box with 3 terminals on it. The 2 outside terminals are the AC input. The center terminal is the DC output. Use your meter to test for battery voltage at the center terminal. It should read about 12V. If it does not, either the fuse is blown, or the wire is broken. If it reads battery voltage, set your meter to ACV, and connect one lead to each of the outer terminals. Start the engine, and run it to full throttle. You should read between 40 and 60 VAC. If it does not, the stator is bad. If you have good AC voltage going in to the regulator, set your meter back to DCV. Retest the center terminal for DCV. With the engine running full throttle, it should read 13.6 - 14.7 VDC. If you have good AC voltage going in to the regulator, but no DC voltage coming out, the regulator is bad.
	Like them all, but love the "B"s.