New 383 MAG Inboard 4V – a perfect repower for all Bertram 28, 31 & 35s
Finally, the perfect engine to replace a 5.7 litre or 7.4 litre classic inboard!
Not only is MerCruiser’s new 383 MAG Inboard 4V powerful and lightweight, it also comes
in standard and opposite rotation versions – making it an ideal repower option for many boat owners.
“For example, there are a lot of people with older 28, 31, 35 Bertrams who are still running their original, tired engines,” said David Meehan, Director of MerCruiser (Australia, New Zealand, Pacific).
“The 383 MAG Inboard is the perfect answer. It’ll be like having a new boat, guaranteed, at a lot less cost.”
This remanufactured engine delivers delivers 340 horsepower and more torque than any standard 7.4L big block.
And it does so while weighing some 70 kilograms less.
“It is compact as well, so it will fit into the existing engine bay without any costly engineering,” David said.
And the option of standard and opposite rotation versions means there’s no need to install a new transmission for twin engine applications.
The 383 MAG also has a full roller valve train which reduces friction and saves on fuel.
All MerCruiser Remanufactured engines come with a 1-year factory backed limited warranty.
Horsepower @ flywheel | 340 |
Kilowatts @ flywheel | 254 |
Maximum RPM (WOT) | 4600-5000 |
Cylinders | Remanufactured GM V8 Marine Iron Block & Gen+ Heads – 062 Casting |
Displacement (CID/L) | 383 / 6.3 |
Bore & Stroke (in/mm) | 4.03 x 3.75in |
Compression Ratio | 9.0:1 with Hypereutectic Pistons |
Fuel Requirement | 87 octane (R+M)/2 |
Engine Control System | Thunderbolt V w/Knock Control – MIE Calibration |
Fuel Delivery System | 4V carburettor and mechanical fuel pump |
Fuel Injection System / Carburettor Type | 750 cfm Weber 4V with electric choke |
Induction System | Dual Plane Aluminium Intake Manifold with Bronze Inserts |
Charging alternator amp | 65 |
Charging alternator watt | 917 |
Water drain system | Multi-point drain – Hand Removable Blue Drain Plugs |
Exhaust System | Iron manifold with Dry-Joint Exhaust Elbow |
Cooling System | Thermostatically Controlled Raw Water – 143F |
Accessory Drive System | Serpentine belt |
Lubrication System | High Flow 100 psi Oil Pump and Copper Oil Cooler |
Recommended Oil | SAE 25-40 NMMA Certified FC-W Synthetic Blend |
Rocker Arms | 1.6:1 Full Roller Aluminium |
Length (in/mm) | 43in / 1092mm |
Width (in/mm) | 29in / 737mm |
Height (in/mm) | 22in / 559mm |
Weight (lbs/kg) | 980lbs / 444kg – When Installed with 72C Transmission |
Features & Related Products | Audio Warning System: |
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