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Engine RPM


michaeljp86's Avatar
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03-18-06, 08:13 PM   #1  
Engine RPM

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.

 
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03-18-06, 08:14 PM   #2  
whats da model number? i'm guessing around 3600RPM but if i have the model number i can check to be sure

 
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03-18-06, 08:21 PM   #3  
I will check it tomarrow

 
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03-18-06, 08:33 PM   #4  
here the prob

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

 
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03-18-06, 08:39 PM   #5  
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.

 
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03-18-06, 08:39 PM   #6  
3,600 rpm...

 
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03-18-06, 08:46 PM   #7  
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

 
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03-19-06, 08:57 AM   #8  
da model # is 289707

 
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03-20-06, 11:28 AM   #9  
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.

 
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03-20-06, 02:07 PM   #10  
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.

 
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