B&S 8HP Unknown Part

[donens]

Came across another issue. The Briggs Starter nylon gear keeps stripping after only a couple of rotations, binding to the ring gear. The ring gear with the alternator magnets is made of steel. Seems like the nylon gear gets jambed in the teeth of ring gear. There is no real fine adjustment for mounting, so not sure why this is happening. I looked at Briggs shop manual and it states that for the nylon gear, the ring gear should be aluminum, while steel ring gears should use metal starter gear.
Can anyone confirm this is in fact true?

 

[Rivets]

Duh, if that's what it says in the manual, it's true. Do you think they would tell you something that will cause problems?

 

[bertsmobile1]

Came across another issue. The Briggs Starter nylon gear keeps stripping after only a couple of rotations, binding to the ring gear. The ring gear with the alternator magnets is made of steel. Seems like the nylon gear gets jambed in the teeth of ring gear. There is no real fine adjustment for mounting, so not sure why this is happening. I looked at Briggs shop manual and it states that for the nylon gear, the ring gear should be aluminum, while steel ring gears should use metal starter gear.
Can anyone confirm this is in fact true?

Yes this is true.
Teeth of different materials are also a different shape so they don;t mesh properly and will jamb

 

[Boobala]

Came across another issue. The Briggs Starter nylon gear keeps stripping after only a couple of rotations, binding to the ring gear. The ring gear with the alternator magnets is made of steel. Seems like the nylon gear gets jambed in the teeth of ring gear. There is no real fine adjustment for mounting, so not sure why this is happening. I looked at Briggs shop manual and it states that for the nylon gear, the ring gear should be aluminum, while steel ring gears should use metal starter gear.
Can anyone confirm this is in fact true?

This may be of some help ......... Boobala .... :thumbsup:

View attachment Electric Starter Quick Reference Guide for engines built after 1976 BRIGGS & STRATTON..pdf

 

[donens]

Would the steel ring gear cause the nylon gear to jamb? The manual really doesn't state associated problems.

 

[reynoldston]

. Do you think they would tell you something that will cause problems?

Yes very much so. If you got the right starter and the gears match you may very well need to shim the starter. There are times when you need to shim starters to make them work right. Haven't seen it much on mower engines but I seen it more on car engines. They make a gauge to check the right clearance. I made my own gauge from a peace of wire. You sure wouldn't find this in any manual. I can remember the first time this happen to me many years back.

 

[donens]

Yes very much so. If you got the right starter and the gears match you may very well need to shim the starter. There are times when you need to shim starters to make them work right. Haven't seen it much on mower engines but I seen it more on car engines. They make a gauge to check the right clearance. I made my own gauge from a peace of wire. You sure wouldn't find this in any manual. I can remember the first time this happen to me many years back.

Would you have a pic of the gauge you made from a piece of wire?

 

[bertsmobile1]

Would the steel ring gear cause the nylon gear to jamb? The manual really doesn't state associated problems.

If you slip the gear off the starter and hold it lightly beween your finger hen try to run it around the flywheel you will find about 1.5 to 2 revolutions it will lock because the shape of the teeth are different.

The manual does not tell you a lot of things because it is a service reference manual designed for the use of experienced mechanics most of who will have been to the B & S training school so we all know this.
The manual is not "B & S Engines for Dummies" for that level of explanations you will need to find a Clymer or Haynes or Chiltons manual which are aimed at the general public with a bit of mechanical skills.

Please note I am not trying to be rude but a lot of people thik the manual should be of the "remove the 9/16 inch bolt with a 2 foot ring spanner then undo the 1/2 bolt on the left side with a tube spanner" style which it is definitely not.

 

[donens]

Hi Donens,
Do you know about this site?:laughing:
Case Colt Ingersoll Lawn and Garden Tractor Forum

Thanks for the info! Looked at the brush, but at ~$115 US per brush, just a little expensive at over $1000 to replace all the brushes. Not sure why the brushes should be so expensive. Will have to get creative in replace! Not sure yet what might work, maybe an alternative material or find cheaper shorter brushes in tandem, uncrimping brush clip. Might be labor intensive but it's only time.

 

[mechanic mark]

Results manual & parts