FNM 20HPEP-180 Sterndrive Adapter Marine Diesel Engine

Description

Experience clean diesel torque during high-speed intercept maneuvers with the FNM 20HPEP-180 Sterndrive Adapter Marine Engine, outputting 180 BHP at 4,000 RPM from a 2.0L displacement. This turbocharged 16-Valve common rail unit matches Mercruiser Bravo and Volvo Penta outdrives, though boat riggers must install multi-stage 2-micron fuel filters and monitor outdrive coupler alignment.

Engine structure unites a parent-bore cast iron block with a 16-Valve aluminum alloy cylinder head, hydraulic tappets, and double overhead camshafts. Electrical systems run on a 12V negative ground loop driven by a 12V 2.0 kW starter and a 12V 105A marine alternator. Dry mass totals 540 lbs across an engine stance measuring 29.9in long by 26.8in wide and 28.0in high. Sump oil capacity reaches 1.32 US gal.

Key Features of FNM 20HPEP-180

Fleet managers buy FNM 20HPEP-180 sterndrive packages to replace aging gasoline engines on high-speed commercial workboat diesel engine repower craft. This turnkey power package couples flush to Mercruiser Bravo and Volvo Penta sterndrive transom assemblies.

• Sterndrive adapter housing bolts flush to Mercruiser Bravo and Volvo Penta outdrive transoms without hull modifications.
• Variable geometry turbocharger supplies high torque across low RPM ranges to push heavy hulls onto plane.
• MultiJet II electronic direct injection operates at 1,800 bar to eliminate soot on boat transoms.
• Hydraulic valve lifters eliminate regular manual valve lash adjustments during commercial operating seasons.
• Fresh water heat exchanger with sacrificial zincs isolates ocean seawater from aluminum components.
• Compact 540 lbs dry weight preserves vessel center of gravity on high-speed commercial RIBs.
• High-capacity 12V 105A alternator provides dependable charging power for commercial communication instruments.

Dynamometer Sterndrive Load Test Metrics

Test cell dyno runs confirm 135 BHP continuous power at 3,600 RPM and 180 BHP intermittent sprint output at 4,000 RPM. Shaft torque hits 258 ft-lbs at 2,000 RPM via variable turbine geometry. Common rail fuel injection pressure sustains 1,800 bar with boost air pressure holding at 1.8 bar. Pre-turbine exhaust gas temperatures peak at 1,140°F under maximum continuous load. Closed-circuit cooling keeps internal engine temperatures at 185°F. Main journal runout measures 0.0003in TIR, and lube oil pressure reads 48 PSI across a 20° tilt.

Sterndrive Operation Maintenance Service Protocol

Electronic helm controls require 1 lb of smooth lever action without cable slack. Do not select this high-speed sterndrive package for continuous heavy river pushing, ocean trawling, or slow-speed displacement barge work. The high-RPM common rail profile is tailored for commercial workboat diesel engine repower installations on fast response RIBs and passenger water taxis.

• Drain engine oil and replace the spin-on filter every 200 operating hours with approved 5W-40 oil.
• Change primary 2-micron fuel water separator elements every 250 operating hours to preserve injectors.
• Inspect sterndrive drive coupler spline grease and zinc anodes every 150 operating hours in salt water.

Sterndrive Package Warranty Crate Contents

FNM CMD provides a 2-Year limited marine manufacturer warranty for this sterndrive propulsion system. The factory crate includes the bobtail engine unit, Mercruiser Bravo adapter kit, drive coupler, 12V starter, 12V 105A alternator, digital instrument panel, wiring harness, vibration isolation mounts, and comprehensive factory installation manuals.