Briggs Starter/Generator Belt Confusion

[laytonlight 10]

I'm looking to buy a generator belt for my B&S 16 Horse (320421-0134-01-7007291). The Briggs Number is 68878. Any search on that number only brings up Briggs manufactured ones costing $33.50 (Jack's Small Engines) and doesn't give any specs on the belt. I've searched the Simplicity number for it (122146) and come up with different belts around $14.00. (EX: Stens Aramid 38" x 3/8" x 7/32" 3L). I'm not finding any equivalent from the major belt manufacturers (Gates, Dayco, etc.) Anyone replace this belt with something they are happy with that they can provide a link to? I just don't want to get down the road and have to replace a cheap one after the drive shaft is installed. I've had good luck with the NAPA FHP belts, I may just go with the correct size and profile in one of them unless someone has a better suggestion. Thanks.

[Simplicity7013H 95]

I use a 39"x3/8" belt on all of my generators.

[powerking_one 0]

Layton,

Simplicity used there own "home grown" starter generator mounting bracket for the C.I. Briggs engines. Was this 16HP engine w/S.G. bracket originally from a Simplicity/Allis tractor? The B&S parts reference to "their" OEM belt is probably a different length. For the Simplicity/Allis 12HP-16HP SG belt, I show it as PN 157524-->2157524SM and is about $11.50 from Jack's. It looks to be 39"L x 3/8". The 12246 looks to be 38" x 3/8". Sorry, I don't know what the B&S PN 68878 length is.

Tom (PK)

[PhanDad 3,613]

There are two types of S/G brackets, one Simplicity, the other A/C which I have on my B-110 and Homelite T-12 (itis probably used on the A/C 310 and 410 tractors also):Simplicity Bracket:

Homelite (A/C) Bracket:

The Homelite bracket calls for a 37" belt vs 39" for the Simplicity bracket. The Homelite bracket positions the S/G a little lower and tighter to the Briggs engine. I've found each type of bracket on both tractor brands due to engine swaps over the years.The belt part number I have for the A/C Homelite bracket is 1607323, listed as a 37 1/2" belt, but a 37" belt works OK. Some have had issues when using the larger belt with an A/C Homelite bracket, the S/G swings out too far and the field terminal hits the hood.

[Chris727 2,014]

I think I have three different types of "Large Frame" Simplicity S/G brackets laying around here. The early 10hp FDT's had a different pulley on the engine (3 piece steel) compared the the aluminum pulley's made by B&S. Some of these may have had differences in diameter resulting in different belt sizes.

[MikeES 458]

The 39" belt is easy to put on. The 38" belt is more difficult to put on but when it is on, it tucks the S/G up tight against the engine, and does not stick out beyond the hood...gives a nice clean look to the tractor.

[laytonlight 10]

As always, thanks for the help. I'll take a look at the pulley and take it from there. At least I know I don't have to buy the expensive B&S one. For anyone thinking of joining, this group has saved me 10 times what I pay in dues!