Johnson / Evinrude 50 HP (E50DTLSCS, E50DPLSCB, E50DSLSCS) Outboard Motor Specs
The Johnson and Evinrude 50 HP outboard engine lineup—comprising models E50DTLSCS, E50DPLSCB, and E50DSLSCS—stands as a prime example of Outboard Marine Corporation’s (OMC) legacy in high-performance two-stroke engineering. Delivering a robust 50 HP (36.8 kW) at 5750 RPM, these mid-range powerhouses offer an exceptional power-to-weight ratio, weighing in at just 232 to 240 pounds depending on the shaft and trim configuration. Engineered for smooth throttle response across an operating window of 5500 to 6000 RPM, these units remain favorites among classic boating enthusiasts and working watermen alike. Whether mounted on a lightweight runabout or a versatile utility skiff, these OMC models continue to demonstrate why OMC’s two-stroke marine technology remains highly respected on the water.
Johnson / Evinrude 50 HP (E50DTLSCS, E50DPLSCB, E50DSLSCS) Outboard Motor Specs
| HP: | 50 |
| Models: | E50DTLSCS, E50DPLSCB, E50DSLSCS |
| Full Throttle Operating Range RPM: | 5500 to 6000 RPM |
| Power: | 50 HP (36.8 kw) @ 5750 RPM |
| Idle RPM in Gear: | 800 ± 50 EMM Controlled |
| Idle RPM in Neutral: | 750 ± 50 EMM Controlled |
| Test Propeller: | P/N 382861 |
| Weight: | (RL) Models: 232 lbs. (105 kg); (HL, PL, SL, TL) Models: 240 lbs. (109 kg) |
| Lubrication (Engine Oil): | Evinrude/Johnson XD100, XD50, XD30; or NMMA TC-W3 certified |
| Engine Type: | In-line, 2 Cylinder, Two-Cycle |
| Displacement: | 52.7 cu. in. (864 cc) |
| Bore: | 3.601 in (91.47 mm) |
| Stroke: | 2.588 in. (65.74 mm) |
| Standard Bore: | 3.6005 to 3.6015 in. (91.45 to 91.48 mm) – to bore oversize, add piston oversize dimension to standard bore |
| Top Crankshaft Journal: | 2.1870 to 2.1875 in. (55.55 to 55.56 mm) |
| Center Crankshaft Journal: | 2.1870 to 2.1875 in. (55.55 to 55.56 mm) |
| Bottom Crankshaft Journal: | 1.5747 to 1.5752 in. (40.0 to 40.01 mm) |
| Rod Crankpin: | 1.3757 to 1.3762 in. (34.94 to 34.96 mm) |
| Piston Ring End Gap, Both: | 0.011 to 0.023 in. (0.28 to 0.58 mm) |
| Minimum Battery Requirements: | 640 CCA (800 MCA) or 800 CCA (1000 MCA) below 32 F (0 C) |
| Alternator: | 25-Amp fully regulated. Refer to Predelivery and Installation Guide for multiple battery applications. |
| Tachometer Setting: | 6 pulse (12 pole) |
| Engine Fuse: | P/N 967545 – 10 A |
| Thermostat: | 143F (62C) |
| Maximum Temperature: | 212F (100C) |
| Water Pressure: | 12 to 14 psi @ 5000 RPM |
| Ignition Type: | Capacitor Discharge |
| Firing Order: | 1-2 |
| Ignition Timing: | EMM Controlled |
| RPM Limit in Gear: | 6250 |
| RPM Limit in Neutral: | 1800 |
| Crankshaft Position Sensor Air Gap: | Fixed |
| Spark Plug: | Refer to Emission Control Information Label; Champion QC10WEP @ 0.028 ± 0.003 in. (0.71 mm) |
| Gear Ratio: | 12:32 (.375) |
| Gearcase Lubricant: | HPF XR Gearcase Lube; HPF Pro in high performance or commercial applications |
| Gearcase Capacity: | 22 fl. oz. (650 ml) |
| Shift Rod Height: | 20 in. (L) Models: 21.38 (543 mm) ± one-half turn |
| Shift Cable Stroke: | 1.125 to 1.330 in. (28.6 to 33.8 mm) measured between NEUTRAL and FORWARD |
| Fuel/Oil Control: | EMM Controlled |
| Starting Enrichment: | EMM Controlled |
| Minimum (High) Fuel Pressure: | 24 to 28 psi (165 to 193 kPa) |
| Minimum Fuel Lift Pump Pressure: | 3 psi (21 kPa) |
| Maximum Fuel Inlet Vacuum: | 4 in. Hg. |
| Minimum Octane: | 87 AKI (R+M)/2 or 90 RON |
| Fuel Additives: | 2+4 Fuel Conditioner, Fuel System Cleaner. Use of other additives may result in engine damage. |
| PT/T Lubrication: | Evinrude/Johnson Biodegradable TNT Fluid |
| PT/T Fluid Capacity: | 15.2 fl. oz. (450 ml) |
| Trim Range: | 0 to 15 |
| Tilt Range: | 16 to 65 |
Service & Maintenance Insights
Maintaining optimal performance on the E50DTLSCS, E50DPLSCB, and E50DSLSCS models requires strict adherence to factory service parameters, particularly regarding the sophisticated Engine Management Module (EMM). Because idle speeds are directly controlled by the EMM—calibrated specifically for 750 ± 50 RPM in neutral and 800 ± 50 RPM in gear—technicians should avoid manual mechanical linkage adjustments and instead focus on maintaining immaculate electrical connections. A clean, fully charged marine battery is vital, as voltage drops can disrupt EMM processing and lead to rough idling or erratic spark timing across the ignition system.
When propping your vessel, always target the upper limit of the 5500 to 6000 full-throttle RPM range under a normal operating load. Utilizing OMC’s official test propeller (P/N 382861) during baseline service diagnostics ensures the engine reaches its peak output of 50 HP at 5750 RPM without lugging the powerhead. Routine gearcase maintenance is equally critical for both the lightweight 232 lb (RL) and 240 lb (HL, PL, SL, TL) variants; drain and inspect the lower unit lubricant every 100 hours or at the end of each season, inspecting magnetic drain plugs for metallic debris and replacing fill/drain seals to prevent water contamination. Finally, preserve internal powerhead components by using fresh fuel mixed with premium TC-W3 two-stroke oil, guaranteeing proper film strength during high-RPM operation.
Disclaimer & Information Notice: Specifications, fuel ratios, and maintenance guidelines listed on VintageMotorSpecs.com are compiled for historical reference and educational purposes only. Always verify data against an official OEM service manual prior to ordering parts or executing repairs. VintageMotorSpecs.com assumes no liability for repair errors, equipment damage, or personal injury resulting from the use of this data.
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