Trx newbie - Page 3 - Honda TRX Forum
Reply
 
LinkBack Thread Tools Display Modes
post #21 of 25 Old 12-16-2018, 01:37 PM
Super Moderator
Feedback Score: 0 reviews
 
Join Date: Jan 2011
Location: Smack in the middle of Illinois
Posts: 2,896
Thanks: 5
Thanked 287 Times in 282 Posts
There's basically three reasons a starter motor will spin without cranking the engine; 1) battery hooked up backwards (positive to ground), 2) bad starter drive (clutch between the starter motor and crankshaft) a common problem on abused engines that had infrequent oil changes and degraded batteries, 3) the starter motor shaft has broken or the teeth that engage the clutch gear have been stripped. There are other less common problems like the bolts holding the starter clutch to the flywheel are broken or backed out no longer holding the clutch to the flywheel, a loose flywheel and a sheared key or a broken crankshaft.

It's what keeps a mechanic busy - trying to figure out why something does not work
Here 2 help is offline  
Sponsored Links
Advertisement
 
post #22 of 25 Old 12-16-2018, 04:39 PM Thread Starter
Junior Member
Feedback Score: 0 reviews
 
Join Date: Nov 2018
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Here 2 help View Post
There's basically three reasons a starter motor will spin without cranking the engine; 1) battery hooked up backwards (positive to ground), 2) bad starter drive (clutch between the starter motor and crankshaft) a common problem on abused engines that had infrequent oil changes and degraded batteries, 3) the starter motor shaft has broken or the teeth that engage the clutch gear have been stripped. There are other less common problems like the bolts holding the starter clutch to the flywheel are broken or backed out no longer holding the clutch to the flywheel, a loose flywheel and a sheared key or a broken crankshaft.

It's what keeps a mechanic busy - trying to figure out why something does not work [IMG class=inlineimg]https://www.trxforums.com/forums/images/TRXforums_2017/smilies/tango_face_glasses.png[/IMG]


Wow that's got me asking myself a million questions now


After trouble shooting and taking the rear case off and looking at the starter gears they don't look stripped at all i think it's a issue with the flywheel

I replaced the crank with a brand new factory crank shaft it spun nice and smooth but when I put the front case back on and tightened all the bolts the crank wouldn't turn as smooth it felt like It was getting stuck a tiny bit

I'm thinking I didn't secured the flywheel correctly
JonD024 is offline  
post #23 of 25 Old 12-19-2018, 04:40 PM Thread Starter
Junior Member
Feedback Score: 0 reviews
 
Join Date: Nov 2018
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Here 2 help View Post
There's basically three reasons a starter motor will spin without cranking the engine; 1) battery hooked up backwards (positive to ground), 2) bad starter drive (clutch between the starter motor and crankshaft) a common problem on abused engines that had infrequent oil changes and degraded batteries, 3) the starter motor shaft has broken or the teeth that engage the clutch gear have been stripped. There are other less common problems like the bolts holding the starter clutch to the flywheel are broken or backed out no longer holding the clutch to the flywheel, a loose flywheel and a sheared key or a broken crankshaft.

It's what keeps a mechanic busy - trying to figure out why something does not work [IMG class=inlineimg]https://www.trxforums.com/forums/images/TRXforums_2017/smilies/tango_face_glasses.png[/IMG]

So after checking the flywheel it's spins nice and smooth now but the starter still won't grab the gears to spin it over
Why are the gears not grabbing?!
JonD024 is offline  
Sponsored Links
Advertisement
 
post #24 of 25 Old 12-20-2018, 02:03 AM
Super Moderator
Feedback Score: 0 reviews
 
Join Date: Jan 2011
Location: Smack in the middle of Illinois
Posts: 2,896
Thanks: 5
Thanked 287 Times in 282 Posts
Simple - the gears are perpetually engaged - the starter motor spins the gears - the large gear behind the flywheel has a hub that runs inside a one way clutch - the large gear is supposed to bind (lock up) when the starter turns the gear counter clockwise - when the engine starts, it runs faster than cranking speed, so the starter gear unlocks and the one way clutch is no longer driving the flywheel. If you hit the starter while the engine is running, the starter motor runs, but nothing else happens as the engine is running faster than the starter motor turns the starter gear.

When the one way clutch is worn out or damaged, the large gear will spin without locking in both directions - both the large starter gear with hub and the one way clutch need to be replaced to fix the problem and the oil needs to be changed regularly to prevent the clutch from wearing out prematurely.
Here 2 help is offline  
post #25 of 25 Old 12-20-2018, 12:09 PM Thread Starter
Junior Member
Feedback Score: 0 reviews
 
Join Date: Nov 2018
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Here 2 help View Post
Simple - the gears are perpetually engaged - the starter motor spins the gears - the large gear behind the flywheel has a hub that runs inside a one way clutch - the large gear is supposed to bind (lock up) when the starter turns the gear counter clockwise - when the engine starts, it runs faster than cranking speed, so the starter gear unlocks and the one way clutch is no longer driving the flywheel. If you hit the starter while the engine is running, the starter motor runs, but nothing else happens as the engine is running faster than the starter motor turns the starter gear.

When the one way clutch is worn out or damaged, the large gear will spin without locking in both directions - both the large starter gear with hub and the one way clutch need to be replaced to fix the problem and the oil needs to be changed regularly to prevent the clutch from wearing out prematurely.

So the starter is supposed to spin clockwise? Or do I need to replace the starter to?
JonD024 is offline  
Reply

  Lower Navigation
Go Back   Honda TRX Forum > Honda TRX Discussions > New Member Introductions

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda TRX Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome