Mercruiser 454 Horsepower. Mercury 454 MPI OEM Intake Hardened exhaust valve seat inserts are more tolerant of low lead fuels, improving reliability and engine life. MerCruiser's 454 MAG MPI cranks out a potent 385 propshaft horsepower
Mercury MERCRUSIER 454 MAG MPI from pomerleaumarine.com
Technicians enhance the performance of the stock 454 GM block by using high flow cylinder heads with enlarged intake ports that improve air flow throughout the engine 320 hp: 24.5 GPH: MerCruiser 7.4 MPI - 454 cid: 310 hp: 28.5 GPH: MerCruiser 8.1 MAG - 496 cid: 375 hp: 30.5 GPH: MerCruiser 8.1 HO - 496 cid: 425 hp: 33.5 GPH: MerCruiser 8.2 MAG - 502 cid: 380 hp: 31.0 GPH: MerCruiser 8.2 HO - 502 cid: 430 hp: 37.5 GPH: Factors such as propeller pitch, weight, hull / water conditions, etc
Mercury MERCRUSIER 454 MAG MPI
Sterndrive Engines ( 454 Magnum MPI V-8 ) MerCruiser 454 MAG MPI Specifications (2012 Model)(Contact us for latest model information) Propshaft Horsepower: 385 (288 kW) Displacement (Liter/CID): 7.4L/454 Cylinders: V-8 Bore & Stroke (inches/mm): 4.25 x 4.00/108 x 101 Compression Ratio: 8.6:1 Fuel System: MPI Full Throttle RPM Range: 4600-5000. They are the same heads that are used in the 8.2L 502 cid engine Large selection of quality mercruiser parts, marine engines, marine parts, boats parts and accessories, such as Mercuiser engines, exhaust, motors, and other boating supplies and accessories.
7.4 454 mercruiser engine gen6 454 mag 400 hp marine replacment dyno. I've asked here about the history of the 454 due to its outstanding design and performance in a marine engine application but haven't gotten much response. Both oif these engine models are easy to recognize by the large "Bread Box" style intake plenum mounted directly on top of the engine.
Pair of 454 MerCruiser 7.4L Gen IV 330 HP WITH Velvet Drive AS1272C 1.. 320 hp: 24.5 GPH: MerCruiser 7.4 MPI - 454 cid: 310 hp: 28.5 GPH: MerCruiser 8.1 MAG - 496 cid: 375 hp: 30.5 GPH: MerCruiser 8.1 HO - 496 cid: 425 hp: 33.5 GPH: MerCruiser 8.2 MAG - 502 cid: 380 hp: 31.0 GPH: MerCruiser 8.2 HO - 502 cid: 430 hp: 37.5 GPH: Factors such as propeller pitch, weight, hull / water conditions, etc Large selection of quality mercruiser parts, marine engines, marine parts, boats parts and accessories, such as Mercuiser engines, exhaust, motors, and other boating supplies and accessories.