New Bobtail 3.0L Alpha "PLUS" Engine p/n 8M0187358 (#MercBob-30LTKS-A-CPO-8M0116646)
Part #: MercBob-30LTKS-A-CPO-8M0116646
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**SALE: MerCruiser is currently offering a 3 Year Warranty/Extended Protection Plan on this 3.0L Bobtail Engine Model.**
3.0L MerCruiser carbureted bobtail engine to be used with Alpha sterndrive applications. The MerCruiser 3.0L is one of the most commonly used Marine Engines for powering runabout Boat Models.
For factory installed engine options, see the table below.
Click here to go to the shim kit upgrade that is used on the newer style MerCruiser bobtail engines. The purpose of this Shim Kit was to improve the alignment between the sterndrive input shaft and the engine coupler.
An adapter may be required when repowering a boat and replacing an engine that was equipped with the old style 10 pin connector used up through approximately 2006. Click here to go the adapter.
NOTE: Due to the 2010 EPA changes pertaining to inboard marine engines, purchasing this engine requires the old engine to be returned to MerCruiser (at their expense) as well as providing the related boat hull identification numbers and other additional related information. These requirements are mandated by the EPA and not within our direct control or processing.
| Specifications | |
| Power | 135HP (101kW) |
| Full Throttle Range | 4400 - 4800 RPM |
| Displacement | 181CID (3.0L) |
| Engine Type | I4 |
| Bore & Stroke | 4.00" X 3.60" (101mm X 91mm) |
| Compression Ratio | 9.3:1 |
| Fuel Requirement | 87 Octane (R+M)/2 |
| Fuel System | 2V Carb with Turn Key Start & Mechanical Fuel Pump |
| Induction System | Single Piece Iron Intake-Exhaust Manifold |
| Ignition System | EST Analog with Distributor |
| Charging System | 65 Amp/917 Watt Alternator |
| Water Drain System | Quick-Disconnect Drain Hoses with Flush Feature |
| Exhaust System | Iron Manifold with EDP Coating |
| Cooling System | Thermostatically Controlled, Raw Water |
| Accessory Drive System | V-Belt |
| Optional Power Steering | Available |
| Recommended Engine Oil | MerCruiser Full Synthetic Engine Oil - SAE 20W-40 |
| Engine Guardian System | Low Oil Pressure, High Coolant Temperature, Low Drive Lube |
| Alpha Ratios | 2.0, 2.40(H) |
| Dimensions (LxWxH) in | 29 x 26 x 21 |
| Dimensions (LxWxH) mm | 730 x 660 x 533 |
| Weight w/ Alpha (lbs./kg) | 635/288 |
| Optional Freshwater Cooling | Available |
| Options | |
| Alpha Sterndrives | Alpha Sterndrives |
| Fresh Water Cooling | Closed Cooling System |
Go here to see our Mercruiser sterndrive rigging.
For Hawaii, Alaska, or international shipping prices, please call.
Specifications and prices are subject to change without notice.