Inquiring on racing parts for 12 HP briggs
- Thread starter MowerJo19
- Start date
Mower King
Well-Known Member
I'm not sure where they are located on the cover/shroud of a 12 HP but, there are usually 3 lines of #'s stamped on it. You have to look at every square inch of the shroud real good. I guess there could be a tag on the shroud also but, most likely stamped!
All I could find Is Model 281707 Type 041501 Code 90032731
Yeah, but I can't figure out the model is it a model 19 or 28?
bertsmobile1
Lawn Royalty
Measure the bore & stroke
Big difference between 19 Cu inches and 28 Cu inches
Within engine types most blower housings are interchangable but usually not between OHV & SV engines so you can never believe the numbers on an engine you did not buy new.
Big difference between 19 Cu inches and 28 Cu inches
Within engine types most blower housings are interchangable but usually not between OHV & SV engines so you can never believe the numbers on an engine you did not buy new.
StarTech
Lawn Royalty
The first two digits is the cu in of the engine so this one is 28 cu in.
bertsmobile1
Lawn Royalty
provided the blower housing is the one the engine left the plant with .
Been caught out by swapped housings on more than one occasions
Hammermechanicman
Lawn Addict
Hot rodding a 12hp flat head is essentially the same as the 5hp used for years in WKA racing. Installing a larger carb without a cam change is uselesss. The 5hp can run at 6000 RPM with the stock rod. The 12hp can't. As far as i know there is no AM rods or cams for the 12hp. Things that can be done to the 12hp is:
Using offset key to advance timing
Mill head and relieve for valves
Deck block for zero piston popup
Grind easy spin bump off the cam
Valve lash to .003
Remove the govenor at your own risk.
If the compression is raised by removing the easy spin bump on the cam and the head is milled the electric started probably won't be able to crank the enine iver.
Using offset key to advance timing
Mill head and relieve for valves
Deck block for zero piston popup
Grind easy spin bump off the cam
Valve lash to .003
Remove the govenor at your own risk.
If the compression is raised by removing the easy spin bump on the cam and the head is milled the electric started probably won't be able to crank the enine iver.