Engines
The Atlantic 85 is fitted with two Yamaha F115 outboard
engines. There are currently two versions in service,
the F115 (OE 26) and the F115A (OE 33). In mid 2017,
a third iteration of the engine will be rolling out, the
F115B (OE 37). Each engine has a power output of 115hp,
giving the vessel a maximum speed of 35 knots. All variants
of the F115 engine have had a number of modifications.
The outboards have been inversion proofed, enabling
them to remain operational after a capsize.
They also have a modification to the cooling system,
allowing a hose to be attached just above the
anti-cavitation plate. This can be used to supply water to
a running engine whilst the boat is on the carriage. It can
also be used to flush the engines with fresh water once
the boat is recovered. The trim and tilt mechanism has a
modification by way of a butterfly nut. When loosened, it
allows the outboards to be raised and lowered manually if
the hydraulics fail, for transportation or maintenance.
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