August 24, 2019



94. GM 572/620 Marinized Airboat Engine

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Our GM 572/620 Marinized Airboat Engine comes complete with oil pan (with windage tray) to carburetor, including an 850-cfm Holley four-barrel, HEI distributor, red spark plug wires, aluminum short-style water pump, Airboat Dual Belt Pulley System and flex plate.

GM 572/620 Marinized Airboat Engine

Horsepower:
620 @ 5500
Torque:
650 @ 4500 RPM
Max. Recommended RPM:
6000
Compression Ratio:
9.6:1
Block:
25534368 Four Bolt main, cast iron
Crankshaft:
88961554 Forged steel
Connecting Rods:
88962926 PM rods
Pistons:
88962925 Forged Aluminum
Camshaft:
 
88961557 Hydraulic roller
Lift .632" I, .632" E.
Duration @ .050: .254 I, .264 E.
Intake Manifold:
88961161 Aluminum dual plane

Distributor:
88961867 HEI
Cylinder Heads:
12499255   Aluminum 58cc combustion chambers
Rocker Arms:
14085759
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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