Outdoor Power Equipment and Small Engines - Engine RPM

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michaeljp86
03-18-06, 09:13 PM
I have a briggs 12.5hp verticle shaft engine and was wondering if anyone knows the RPM this runs at while at full throttle? I need it to run a gear box and found a 10:1 for fairly cheap but I think it will be to slow.

James Sanders
03-18-06, 09:14 PM
whats da model number? i'm guessing around 3600RPM but if i have the model number i can check to be sure
michaeljp86
03-18-06, 09:21 PM
I will check it tomarrow

yardman15
03-18-06, 09:33 PM
well it will be fast but what's for well if for a go cart ya slow for that but for a rider no but it should get 15 mph mabey
michaeljp86
03-18-06, 09:39 PM
Its for a sawmill, I dont want the blade going 30,000 rpm lol or 300 for that matter, Im not sure what it should run at.
v8driver
03-18-06, 09:39 PM
3,600 rpm...
michaeljp86
03-18-06, 09:46 PM
So with a belt to the gearbox I would probably get about 400 rpm. Then a chain to the drive wheel and that will gear it down more, yikes Ill be at 50 rpm lol
michaeljp86
03-19-06, 09:57 AM
da model # is 289707
puey61
03-20-06, 12:28 PM
All small, OPE intended engines are designed to run at 3600rpm+-. Don't you want a horizontal shaft engine? If so, there are 6:1 ratio, sump mount gear boxes available through Briggs but only up to 10 horse that I'm aware of.
michaeljp86
03-20-06, 03:07 PM
I wish I had a horizontal shaft engine but I got this one for free. I will look into those briggs gear boxes, I didnt know they sold them. I was planning and using a 90 degree gear box so Ill look into th B&S boxes.