Subaru Robin EX27

Subaru EX27 9 horse power over head cam engine
The Subaru EX27 engine is a rated at 9HP out of the box & is a much larger engine that the EX13,EX17,EX21 & KX21 engines.The crankshaft PTO is 1 inch compared to the 3/4 shaft PTO of the smaller series engines.
ex-27-subaru-engine-shaft
The engine foot print is also larger & is along the same size as the bigger cubed Honda 390 & Briggs & Stratton model 20 engines.
ex27-subaru-kart-engine-base
The Subaru KX21 on the left & the EX27 on the right shows the physical difference in size between the 2 engines.
subaru-ex27-kx21-comparison
The EX27 standard out of the box looks like any other Subaru commercial engine.These engine void all warranty when modified like most other small engine manufacturers engines
ex27-premium-engine
the ex27 premium is fitted with a recoil starter, large fuel tank & engine mounted kill switch
The EX27 has an oil capacity of 1 litre
ex27-gokart-engine-9-horsepower-rc
The factory exhaust & muffler box is designed to meet emissions & noise requirements rather than all out power.
For pricing & a list of products available please click the link below
So in short if you are trying to decide on an ex27 compared to a kx21 it depends on your requirements & if you want to modify the engine or leave it standard. There are more performance parts available for the kx21 than the ex27 & there are a range of clutches to suit the 3/4 crankshaft engines compared to the 1 inch crankshaft that is used in the ex27

subaru-kx21-go-kart-engine