lower unit operations Flashcards
mid-section acts as a holder for what
connect engine to lower unit
connecting components of engine with those of lower unit
why is cavity located between driveshaft housing and the exhaust tube filled with water
exhaust tube located in midsection
the cavity is filled with water to reduce exhaust noise
purpose of bleedhole in exhaust tube
bleed holes in water passages spray water into exhaust tube for cooling
upper motor mount is located where
engine adapter plate
anti-cavitation (anti-ventilation) plate is located where
engine adapter plate
how to check lower unit gear lube
pressure check for signs of leakage
checking lower unit for protrusion/other damage
run fingers over gear case where pinion is located for protrusion
why is visual inspection most important
helps determine the cause of lower unit failure
why is driveshaft inspection so important after hard impact
helps determine the cause of failure
why use new seals
using used oil seals, it may cause oil leakage due to invisible scratches or stretching
back lash too tight or too loose, why?
too loose
when too tight, it has much too much clearance, gears will bind against each other causing teeth to break
benefits of jet pump lower unit
allows for easy navigation in shallow water and allows for beaching of boat at remote locations
cause of seal interference
rust
which component in gear case is shimmed first
pinion gears
