Small petrol or diesel engine (direct drive)

Needs power

A small combustion engine driving a pump, a splitter, a tiller or a winch directly off its shaft. The answer where the work is away from any wiring and heavier than a person can do, which is why it is the conventional choice on a smallholding. It keeps running when the grid does not, and that is its one resilience argument. Against it: it needs fuel somebody delivers, it is loud, it cannot be run indoors, and it wants servicing on a schedule rather than when it breaks.

One of 8 ways to meet Generation. Build 1/8, Upkeep 4/8, Efficiency not rated. Cost, carbon and footprint below are rated against those 8, not in absolute terms.

Cost: Medium
Upkeep: Seasonal
Skill to build: None
Lifespan: Long if serviced; the servicing schedule is the whole determinant
Embodied carbon: Medium
Space / material use: Low
Output timing: On-demand/controllable
Skill to repair: Intermediate
Regulation (FR example): Noise from garden and site equipment is restricted by prefectoral and municipal orders, typically by time of day and day of week.

Inputs

Liquid/Bottled Fuel (propane, heating oil)

Outputs

Ranking in its sub-function out of 8 alternatives

Every option in this sub-function, with the value on each axis and a note on what drives it (this solution highlighted):

Solution	Build skill	Upkeep burden	Efficiency
Solar PV array	Intermediate	4	N/A
Small wind turbine	Intermediate	5	N/A
Micro-hydro turbine	Intermediate	5	N/A
Grid connection	Specialist	4	N/A
Pedal / hand-crank generator	Basic	3	N/A
Water motor for direct mechanical drive	Intermediate	5	N/A
Electric motor (mains or battery driven)	None	4	N/A
Small petrol or diesel engine (direct drive)	None	7	N/A

Build skill and upkeep burden are proxies (lower burden = simpler to maintain); the efficiency column is this sub-function’s ranking, 1 = best. “N/A” where an axis isn’t rated here.

Sources

Project engineering judgement: the conventional source of shaft power

Tutorials

No build tutorial recorded yet.

What this page does not tell you

No sizing or quantities: how much a technique yields, and how much a household needs, both depend on the build and the people, so the catalogue compares options rather than dimensioning them. It carries no bill of materials and no build sequence, and it is written for an oceanic, clay-soil climate (Normandy, France). Regulatory notes are indicative and need confirming locally.