5hp B&S teardown

[Wilson_Engine_Shop]

I thought I would share some pictures of the teardown process. These might be hard to look at for those who love Briggs motors. I'm going to remove and inspect the rotating assembly so I can send it off to a buddy who has a spare block and parts. He can build me a good performing motor for $50. I dont think I can save this block since the valves, springs, lifters and guides are siezed in place

 

[landuse]

Ugh!! Thats nasty. I don't blame you for not trying to rebuild

 

[Wilson_Engine_Shop]

Do 5hp flatheads have an intake guide? I can see it clearly has an exhaust guide but it needs replaced. Looks like the intake side has no guide to me. Opinions??

 

[Wilson_Engine_Shop]

Im getting ready to re assemble the Briggs but I have one question. What is the torque spec for the factory flywheel? I've read that it is 75ft lbs on multiple sites but theres no way it needs to be that tight. Im afraid I would crack the flywheel or something bad

 

[Budget GoKart]

I have one that has a rotted out exhaust port lol its crunchy if you need any parts lmk

 

[Wilson_Engine_Shop]

I've got all the parts I need. I need to know the proper torque spec for the factory flywheel

 

[mckutzy]

Off hand I couldnt find anything...I needed the fan cover number for a better look... they all go by the engine code and such...

I surprised JT hasnt chimed in yet...

 

[Ksboi]

Another Ks person! Hey I got the same engine if you need parts off it. It ran before I took it off and used a predator 212.

 

[Wilson_Engine_Shop]

Heres the nunbers from the front shroud

 

[mckutzy]

According to this site 55ftlbs for flywheel nut.

https://outdoorpowerinfo.com/engine_specs/briggs_fly_torque.asp

https://outdoorpowerinfo.com/manuals/briggs.asp
https://outdoorpowerinfo.com/engine_specs/references/briggs_stratton_model_date_codes.pdf

Ive used this site before for referance to look up on my '52 #14... good stuff, lots of info..

 

[Wilson_Engine_Shop]

According to this site 55ftlbs for flywheel nut.

https://outdoorpowerinfo.com/engine_specs/briggs_fly_torque.asp

https://outdoorpowerinfo.com/manuals/briggs.asp
https://outdoorpowerinfo.com/engine_specs/references/briggs_stratton_model_date_codes.pdf

Ive used this site before for referance to look up on my '52 #14... good stuff, lots of info..

55ft lbs sounds better lol. Thanks!

 

[Wilson_Engine_Shop]

What is this O-ring for? It came in my 5hp briggs complete gasket set. I also dont know what the thin white gasket is for since there are two others that are thicker

 

[mckutzy]

Im going to guess off hand, the different side plate gaskets are for adjust the end play of the shaft. Might need one, more or a thick depending on the play...
O-ring, Im thinking it for a carb to gas tank seal... but mostly they are flat...But honestly im not sure....

 

[JTSpeedDemon]

Wow, I'm late! That is NASTY!

And BTW - The official torque rating for the flywheel is 65 ft/lbs!

Use one of the gray gaskets and check your end play, the white one is just for spacing it out to adjust for tight end play.