BMW Marine Engines: Workshop & Service Manuals, Parts Catalog

BMW Marine Engines Service Workshop Manuals, Repair Manual, Parts Catalogue Electrical Diagnostics, Wiring Diagrams, Electrical Service Manual.  PDF Free Download

BMW B130 Detailed Engine Information.pdf Download

BMW B130 Parts List.pdf Download

BMW B130, B190, B220 Parts Catalog.PDF Download

BMW B190 Detailed Engine Information.pdf Download

BMW B190, B220 Parts List.pdf Download

BMW B220 Detailed Engine Information.pdf Download

BMW D12 Detailed Engine Information.pdf Download

BMW D12 Diesel Engine Workshop Manual.PDF Download

BMW D12 Parts List.pdf Download

BMW D150 W Detailed Engine Information.pdf Download

BMW D150, D190, D530 & 636 - Silver engines Parts List.pdf Download

BMW D190 Diesel Detailed Engine Information.pdf Download

BMW D35 & D50 Parts List.pdf Download

BMW D50 Workshop Manual Download

BMW D50 detail info.pdf Download

BMW D7 Owners Manual.pdf Download

BMW Engine D150 Diesel Workshop Manual.PDF Download

BMW Engine D190 Diesel Workshop Manual.PDF Download

BMW Engine D35/D50 Diesel Workshop Manual.PDF Download

BMW Engine D636 - Stern Drive Workshop Manual.pdf Download

BMW Engine D636 Diese Detailed Engine Information.pdf Download

BMW Engine D7 Diesel - Detailed Engine Information.pdf Download

BMW Engine D7 Diesel - Parts List.pdf Download

BMW Engine D7 Diesel - Workshop Manual.pdf Download

BMW Marine Motor D150, D190, D530, D636 Parts Catalog.pdf Download

BMW Marine Motor D35-1, D35-2, D50-1, D50-2 Parts Catalog.PDF Download

BMW Marine Motor D7/D12 Parts Catalog.PDF Download

BMW Mark 1 / Mark 2 Parts List.pdf Download

BMW Mark 1 / Mark 2 Sterndrive engine Detailed Engine Information Download

BMW Mark 1 / Mark 2 Sterndrive engine Parts Catalog.pdf Download

BMW Mark 1 / Mark 2 Sterndrive engine Workshop Manual.pdf Download

How to choose an outboard motor

So, you have chosen a boat and are going to put an outboard engine on it. In the abundance of models of such motors, it is easy for a non-specialist to get confused. Models that look similar at first glance can actually be very different from each other.

To select the appropriate option, it is not enough for the buyer to focus on the amount of horsepower and engine dimensions. You will have to figure out the displacement, the number of cylinders, the differences between two-stroke engines from four-stroke ones, carburetor engines from injection engines, and direct fuel injection systems from electronic ones.

We tell you what all these parameters mean for the engine and how not to break your head, reading the data sheet of the outboard motor.

What power should the outboard motor have?

Power of modern outboard engines varies from 2 to 450 hp. (Mercury Racing 450R). There is, however, the Seven Marine 627SV, whose power is 627 hp, but in the fall of 2020, the Volvo Group, which includes the brand, announced that it was going to stop their production.

Engine power depends on two main parameters: the number of cylinders and displacement. Displacement is also called the "working volume" of the engine. This is the sum of the working volumes of all cylinders, which are calculated based on their cross section and the length of the piston stroke. Displacement indicates how much fuel an engine can burn in one cycle.

Carbureted or fuel injected outboard motor?

Fuel supply systems in engines are divided into carburetor and injection.

In a carburetor engine, liquid fuel is first mixed with air in a separate chamber to a homogeneous mixture (this process is called “carburetion”) and only then is it sucked into the cylinders.

The design of the carburetor is relatively simple, so the financial costs for the purchase and subsequent maintenance of such an engine are much lower than in the case of injection systems. The carburetor does not require electricity to operate - it only needs the air flow that the engine sucks.