SH 12 Mini Gasoline Engine Model Educational Engine Toy Science Experiment Kit Set

Specification Item Name SH 12 Mini Gasoline EngineSize 210mmx120mmx270mmNet weight 2 5kgThe net weight of DIY bare metal board is 1 9 kgFuel Gasoline methanolStarting mode hand pull rope Lubricating oil 5w40 4T Lubrication method wet oil pan splash lubricationLubricating oil filling volume 25ml for open cylinder head 35 for closed cylinder headValve distribution mode OHV over head value The cylinder diameter is 25mm the stroke is 24mm and the compression ratio is 5 1Ignition mode CDI 6V Manufacturing processAll aluminum alloy parts are processed by CNC machine tool and electric pulse wire cutting The machining accuracy is 0 02mm The crankshaft is electroplated with hard chromium after 40gr quenching and tempering and fine turning The hardness is HRC55 and the accuracy is 0 01 The main shaft and main shaft gear and cam and camshaft are assembled by hot pressing which is firm and durable All valves adopt 40gr quenching and tempering finish turning and alloy valve guide assembly which is wear resistant and heat resistant Operation guide1 fill the engine with 30ml oil and change the oil for the first time after the engine runs for 3 hours 2 fill the engine oil tank with fuel and the filling amount is shown in the figureToo much fuel will cause the mixture ratio to be too rich or overflow from the fuel injection nozzle resulting in the failure of the engine to start3 The power supply box is equipped with four No 5 dry batteries The assembly method i