The Turbocharged 400 Series Engines incorporates a
"BALANCE PRESSURE" PISTON with a revised second
land configuration and top ring groove and a new
INTERMEDIATE PISTON RING. These technological
advances provide a more positive seal for the top ring
against the bottom of the top ring groove and cylinder
wall (sleeve). Engine oil control is improved significantly.
For ease of service all 300/400 series engines are
equipped with two spin-on, throw-away type oil filters.
A hydraulic fuel system which accurately meters the
required amount of fuel for complete combustion, and
provides complete governor control for power take off
applications without the additional cost of add-on
Incorporated in a built-in timing advance and excess fuel
control device which allows smooth, quiet, and unaided
starting down to 20°F. or below.
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