I would really appreciate some input on the feasibility of putting a 20.5 HP Subaru in a Bigfoot(2000) or Vanguard(1998). I will move forward with this swap if I can confirm the following:
1. Use stock clutches;
2. No major retrofits required (I am not a mechanic);
3. No major Electrical; and
4. No major engine mounting fabrication required.
The Bigfoot has an 18HP Briggs and the Vanguard has a 16HP Briggs.
In particular, I am concerned about the following, however would appreciate any other information that I need to make my decision to proceed with the engine swap:
Subaru - EFI - 20.5HP - Any issues with Engine Size and mounting into the engine compartment
Displacement 653 cc
Torque 32.7 ft-lb
Max. Speed 3,600 RPM
Shaft Diameter 1 in. - I believe this is the same for both Briggs
Shaft Rotation CCW - I assume this is the same as the Briggs?
Shaft Length 2.9 in. - Will this match - any issues with the Clutches? - Can I use stock clutches and belt??
Shaft End Tapped (Diameter (in) / Threads Per Inch) 3/8 in. - 24 UNF - Not sure what this is??
Air Cleaner Type Dual element
Fuel Type Gasoline
Fuel Filter No
Oil Capacity 1.5 qt.
Lubrication System Pressure
Low Oil Alert Yes
Low Oil Shutdown Yes
Start Type 12V DC
Ignition System Electronic
Governer System Mechanical
Number of Cylinders 2
Bore Diameter 3.15 in.
Stroke 2.56 in.
Compression Ratio 8.3:1
Muffler No - Can I use the stock???
Spark Plug Use item # 4780112
Any issues hooking up throttle controls??
Any concerns with overheating??....I understand this was a concern with new B&S 23HP??
Thanks, Rick