Yamaha VX150A, Owner'S Manual

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Flushing with the Flushing Attachment
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Avoid running the outboard at high
speed while on the flushing attachment,
or overheating could occur.
1) Remove the top cowling and silencer
cover. Remove the propeller.
2) Install a flushing attachment to the
lower unit. (A flushing attachment is
available from a Yamaha dealer).
3) Run the engine at a fast idle for 10~15
minutes supplying water.
4) Just prior to turning off the engine,
quickly spray “Yamaha Stor-Rite
Engine Fogging Oil” (Part No. LUB-
STRRT-12-00) alternately into each
intake manifold. When properly done,
the engine will smoke excessively
and almost stall.
5) Remove the flushing attachment and
wipe off any excess water.
6) Install the silencer cover and top
cowling. Install the propeller.