Suzuki outboard motors 1988 2003 repair manual., Page 214Get this manual
7-2 POWERHEAD rThe tr bcre tc ado st01 to theeto provlde lubr cae t on loo011 ddded to tn?Clhe sparkcan be2orre focled"because of the excessive oil within the combustion chamberIf there is not enough oil present with the airlfuel mixture, the piston can "seize" within the cylinder, What usually happens in this case is the piston and cylinder become scored and scratched, from lack of lubricationIn extreme cases, the piston will turn to liquid and eventually disintegrate within the cylinderMost two-stroke engines require that the fuel and oil be mixed before being poured into the fuel tankThis is known as "pre-mixing" the fuelThis can become real hassleYou must be certain that the ratio is correctToo lifile oil in the fuel could cause the piston to seize to the cylinder, causing major engine damage and completely ruining your weekendMost modern two-stroke engines have an oil injection system that automatically mixes the proper amount of oil with the fuel as it enters the engine t
The two-stroke engine can produce substantial power for its size and weightBut why is two-stroke so much smaller and lighter than four-stroke? Well, there is no valvetrainCamshafts, valves and pushrods can really add weight to an engineA two-stroke engine doesn't use valves to control the air and fuel mixture entering and exiting the engineThere are holes, called ports, cut into the cylinder which allow for entry and exit of the fuel mixtureThe two-stroke engine also fires on every second stroke of the piston, which is the primary reason why so much more power is produced than four-strokeSince two-stroke engines discharge approximately one fourth of their fuel unburned, they have come under close scrutiny by environmentalistsMany states have tightened their grip on two-strokes and most manufacturers are hard at work develoing efficient models that can meet the tough emissions standardsnew Check'oyour reculal'ns slae's beforebuy an) ho-slrode The tao-slrode eng nc is aole to fnct1011oecaJse oi !uo vcr) s'nple pn)s'?=I I=" rmcoc 617",rm havvaThoda,u ,f in UII cmGa nf tm I,r- UIGU nf IIGHU IULII UI LIIYIILU uj
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