The Bolinder engine is usually referred to as either a Hot -Bulb engine, or a Semi-Diesel.Compression was VERY low,& they could be started by rotating the flywheel by foot,or sometimes,hand. Bolinder was probably the most famous make, but engines of the type were made by Kromhaut, Petter, & National,among others .English narrowboats usually had a single-cylinder model of about 12 horsepower, and indeed some are still used in enthusiasts' boats to this day.However, some quite large 2-cylinder models of up to 50 HP were made---one of these was fitted in a ferry that operated on Lake Titticaca,for example !! The Hot-Bulb engine would run on just about any oil that would burn. It was essential to pre-heat the cast-iron "bulb" that sat on top of the cylinder-head. This involved the use of one or,usually,more paraffin blow-lamps, and could take up to half an hour !! When the "bulb" was glowing red-hot, the boatman would pull out the spring-loaded pin in the massive flywheel, and literally kick-start the engine.Quite often ,the engine started backwards, which it was designed to do,in which case the boatman got a nasty wound or,often,a broken leg.The captain of a Baltic Trader,from Scandinavia,had an arm ripped out by one !!But once the engine was running,it would only stop when the fuel was turned off,and many English narrowboat crews left them running for days on end !! Oddly enough,they are quite "Green",as they will run on rape-seed oil or cleaned-up cooking-oil---The boat-engine of the future,perhaps ?????