ENGINES - 3A-2590-823225--1 1096
Installation
ALL ENGINES EXCEPT GEN+
IMPORTANT: When installing intake manifold
gaskets, in next step, be sure to do the following:
• Be sure to install gasket with marked side up.
Both gaskets are identical.
• On the 5.0L engine with 2 barrel carburetor,
remove metal insert from manifold gasket to
be used on starboard (right) cylinder head to
provide clearance for heat pipe on intake
manifold.
• All MerCruiser V-8 GM engines that have “au-
tomatic” carburetor chokes must use an in-
take gasket that has an opening for the ex-
haust crossover port in the intake manifold.
Without this opening the “automatic” carbu-
retor choke will not operate properly. The
choke will remain ON longer causing rough
engine operation and wasted fuel.
1. Apply Quicksilver Perfect Seal to intake manifold
gaskets around coolant passages (both sides).
72325
a - Exhaust Crossover Port Opening in Gasket
b - Intake Valve Ports
a
b
b
2. Place gaskets on cylinder heads.
3. Apply a 3/16 in. (5 mm) wide bead of Quicksilver
RTV Sealer to engine block as shown. Extend
sealer 1/2 in. (13 mm) up on intake gaskets.
IMPORTANT: DO NOT get Quicksilver RTV Sealer
into oil sending unit hole at rear of engine.
72325
a - Coolant Passages
a
a
72326
a - Oil Sending Unit Hole
a
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