March 19, 2024



3. GM 350/355 Marinized Airboat Engine

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The ZZ4 350 comes to your door with an aluminum dual-plane intake manifold, HEI distributor, cast iron water pump, dampener, and flexplate.


GM 350/355 Marinized Airboat Engine

Horsepower:
355 @ 5250 RPM
Torque:
405 @ 3500 RPM
Max. Recommended RPM:
5800
Compression Ratio:
10:1
Block:
10105123 Four Bolt main, cast iron
Crankshaft:
12556307 Forged steel
Connecting Rods:
10108688 PM rods
Pistons:
10159436 High silicon aluminum with offset pins
Piston Rings:
12528817
Camshaft:
10185071 Hydraulic roller
Lift .474" I, .510" E.
Duration @ .050: .208° I, .221° E.
Intake Manifold:
10185063 Aluminum dual plane

Distributor:
1104067 HEI
Cylinder Heads:
12556463 Aluminum 58cc combustion chambers
Intake Valves:
10168465 1.94"
Exhaust Valves:
10168514 1.50"
Valve Springs:
12551483 LT4 chrome silicon
Rocker Arms:
10089648 1.5 Ratio
Valve Lash:
Zero
Sparik Plugs:
FR5LS Gap .035 Rapid Fire #5 Gap .045
Fuel:
92 Octane
Ignition Timing:
10° BTDC @ 800 RPM
32° total @ 4000 RPM with vacuum advance disconnected

Information may vary with application. All specifications listed are based on the latest product information available at the time of publication. The right is reserved to make changes at any time without notice.

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