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New 3.0L GM Marine Long Block
Model: 881301 This is a brand NEW General Motors marine base engine. This 3.0L Marine engine is built strictly for marine use on GM production lines.

Our GM Marine long blocks are ideal for replacing an engine when the component parts are still good.  Why replace it if it is not broken?  However, we do recommend replacing warn out components.  All engines, unless clearly stated, are authentic General Motors Marine engines.  Our authentic GM marine engines are built on GM production lines for marine applications.  Don't be mislead by others who can't claim GM authenticity unless you are satisfied with an imitation.

This product ships via Freight Shipping

 PricePart Name
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Includes Specifications Related Parts Return Policy  
  • NEW Block with all internal components 
  • Circulating water pump 
  • Spark Plugs 
  • 14" Flywheel 
  • Oil Pan 
  • Harmonic Balancer 
  • Electronic Distributor 
  • High output ignition coil 
  • Timing Shunt 
  • Power tach. lead 
  • Valve cover 
  • Timing chain cover 
  • Coil to Distributor cable 
  • One Piece rear main seal 
  • Mechanical fuel pump pad 

181 C.I.D. (2966.59 CC) / 3.0L
Cylinders In-line 4 cyl.
Compression Ratio 9.25:1 (High flow vortec head)
Valve Config. Pushrod actuated / Overhead Valves
Valve Lifters Hydraulic flat tappet
Bore x Stroke 4.00" x 3.6" (101.6 x 91.44 mm)
Main Bearings 2 Bolt cast iron
Ignition Delco EST (Electronic)
Flywheel Diameter 14" (Ring gear towards engine)
Firing Order 1-3-4-2
Oil Pan Capacity 4 Quarts (w/o filter)
Horsepower 140 H.P. @ 4800 RPM
Torque 177 lb-ft @ 3600RPM
Warranty 1 year limited (Commercial 90 day)


For items received as described, a refund of the final invoice price (minus shipping and handling charges and a 15% restocking fee) will be issued. Buyer is responsible for return shipping costs and for sufficiently packing and insuring returned items unless otherwise agreed upon. Refunds will not be issued for damaged merchandise. All returns must be made within 15 days of delivery to you. No refunds for electronic parts if box is opened. All returns must have a RMA # and invoice #. 15% restocking fee on any complete engine.

Please email info@marineenginedepot.com for a RMA #

Returns must be shipped to: Marine Engine Depot17506 MPH Industrial ParkPonchatoula, LA 70454

If parts arrive damaged in shipment, it is the customers responsibility to notify the carrier immediately and reject the damaged package. Contact Marine Engine Depot for potential freight damage. A claim will be filed and we will send out the identical part.