Need help engine model number

[KevinO 0]

I was given a poorly running 10-32 rear engine riding mower with NO engine blower shroud.  I need to adjust valve clearance but have no way to get engine specs since I have no model or serial number.  Can anybody help please?

[gwest_ca-(File Mod) 11,070]

Welcome to Red Square

 

Hope this is correct.

1990 tractor model 56165 used B&S 256707-1123-01

1991 tractor model 56190 used B&S 256707-0130-01

1992 tractor model 56190 used B&S 257707-0124-01

1993 tractor model 70080 used B&S 257707-0124-01

1994-1995-1996 tractor model 70080 used B&S 28B707-0126-01

There should be a decal somewhere with the tractor model number and serial number on it.

 

This is the service manual for these engines

Keep the questions coming.

[KevinO 0]

10 hours ago, KevinO said:

I was given a poorly running 10-32 rear engine riding mower with NO engine blower shroud.  I need to adjust valve clearance but have no way to get engine specs since I have no model or serial number.  Can anybody help please?

 

[KevinO 0]

Awesome thank you!!!!!  The decal on the tractor body is mostly faded but maybe I can put enough numbers together to get the year and then the right service manual.  Be nice to get this thing running smooth.  Rebuilt the carb which helped but needs more tlc and I suspect valve clearance.  

[KevinO 0]

It is a 70080.  So that leaves me with two engine possibilities.  Any other way to tell between a 93 model vrs the 94thru96?

[gwest_ca-(File Mod) 11,070]

Have always thought the first 2 digits of the engine model number were the approximate cubic displacement 25 cubic inches and 28 cubic inches. If it is check to see if the bore and stroke are different but that means pulling the head.

Here is a link to the parts lists for each tractor.

https://www.partstree.com/models/70080-10-32-toro-recycler-rear-engine-riding-mower-parts

 

I checked and both use the same head gasket and piston. The parts lists in the above link have multiple engines listed for likely the 8-32 and was there a 12-32?

[Howie 892]

Virtually all of those Briggs engines used the same valve clearance. Be nice to know the exact model number

but by looking at any of those will get you the numbers you need. Will have to pull the head  and valves and 

grind the end of valve stems to set clearance.

[KevinO 0]

I just saw that you mentioned the service manual you included covers all three engines.  Sorry I missed that.  So I am good to go.  Thank you so much, what a great resource you folks are!!!  Kevin.

[gwest_ca-(File Mod) 11,070]

Here are 18 search results in our library for the 70080 model

https://www.wheelhorseforum.com/search/?q=70080&quick=1&type=downloads_file

[KevinO 0]

So after pulling the head and seeing the state of the cylinder and guides, I purchased a Briggs flathead 12hp, model 289707 and am installing it.  Would you please show me the service manual for it?

[gwest_ca-(File Mod) 11,070]

 

[KevinO 0]

Took the carb apart and cleaned it.  It was pretty clean to begin with.   Engine idles great, but won't run at hi speed. Using fresh gas. Backfires thru carb.  Timing/ ignition  problem??  

[953 nut 55,393]

8 hours ago, KevinO said:

Backfires thru carb.  Timing/ ignition  problem??

Could be a bad or wrong condenser. Be sure the condenser you use is the one intended for your engine.

 

If an engine idles well, but runs erratically when revved up, like it hits and misses, pops and backfires, then chances are, it needs a new condenser/capacitor. And always install a condenser/capacitor with the wire facing downward so rain water and/or when washing off engine, water will not enter inside condenser/capacitor, ruining it. With water inside the condenser, this will also allow it to idle well, but cause it to run erratically when revved up.

[KevinO 0]

Had not thought of that.  This is an engine without points.  Will check into that.  Would love an easy fix at this point.