Indmar 350 H.O., Operator'S Manual

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7-6 Indmar Marine Engines
Fresh Water Cooled Engines (Except LS1)
1. Remove the raw water inlet and outlet hoses from
the intake side of the heat exchanger.
2. Check the level of the coolant on the freshwater side
of the heat exchanger. Use the anti-freeze tester to
test the strength of the mixture.
NOTICE
A special antifreeze tester designed to be used with
Propylene Glycol antifreeze is required to test the
strength of the mixture.
3. If the coolant level is low, add a sufficient amount of
coolant/water mix to fill the heat exchanger. Use an
appropriate mix of Sierra brand antifreeze and dis-
tilled water, mixed in accordance with the directions
on the container for the anticipated temperatures.
4. If the coolant in the heat exchanger is not strong
enough to protect the engine to the lowest anticipat-
ed temperature, take your boat to your Indmar dealer
for replacement of coolant.
Fresh Water Cooled Engines
1. Remove the drain plugs on each end of the heat
exchanger. Do not remove center (fresh water
coolant) plug.
2. Remove the hose from the outlet side of the raw
water pump. Push the end of the hose low into the
bilge using care not to kink it. Allow both coolers to
drain.
3. Coat the threads of the heat exchanger drain plugs
with pipe sealant and install.
4. Remove the hose from the rear elbow of one of the
exhaust manifolds. Lower the hose into the bilge
using care not to kink it. Allow both manifolds to
drain.
Drive Train Preparation
1. Change the transmission fluid and clean the filter
screen following the instructions in the Transmission
Owner’s Manual.
2. Remove the attaching hardware from the propeller
shaft coupling. Separate the flanges and coat the
surfaces with Pennzoil Premium Plus Multipurpose
grease.
General Power Package Preparation
1. Clean dirt, grime and grease from painted surfaces
of the engine and drive train.
2. Touch-up painted areas of the engine and transmis-
sion.
3. Lubricate throttle and shift linkages and cables with
Pennzoil Premium Plus Multipurpose Grease.
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