[Sachi]

Necesitaria el Nº de serie, pero en principio debe de ser este (eje largo):

1989 MARINER SANSHIN NA 4 MH model number 7004201PU.

El manual de servicio para el seria el de mercury part number 90-17308R02 - 4/5/102CC SAILPOWER.

Y el despiece del mismo lo encontraras en esta pagina web. http://www.crowleymarine.com/mercury-outboard/696.cfm

Y la descripcion del motor seria (en caso de hablar del mismo) seria esta:

Fuel System

Carburetor Center Bowl, Integral Fuel Pump.
Main Jet, (Model 5) #80.
Main Jet, (Model 4/Sailpower) #78.
Float Level, 13mm (1/2 in.).
Idle RPM, (in FORWARD gear) 850.
Fuel Pre-Mixed, Gasoline and Oil.
Recommended, Gasoline Automotive Regular.
Recommended Oil, 2-Cycle Premium Outboard Oil.
Gasoline/Oil Ratio, 50:1 (Including Break-In).
Integral Fuel Tank Capacity,
U.S. Gallons 0.66,
Imperial Gallons 0.53,
Liters 2.5,
Remote Fuel Tank Capacity,U.S. Gallons 3.2,
Imperial Gallons 2.6,
Liters 12.0.

Ignition System

Ignition Type Capacitor Discharge (CDI).
Recommended Spark Plug, NGK BP7HS-10 orBPR7HS-10.
Spark Plug Gap, 1.0mm (0.040 in.).
Maximum Timing, (WOT) 30,

± 2BTDC.
Idle Timing 5 BTDC.
Capacitor Charging Coil Resistance, 93-142W,

Trigger Coil Resistance, 80-115

W,

Ignition Coil,Primary Winding Resistance 0.02-0.38

W,

Secondary Winding Resistance 3000-4400

W.

Gear Housing

Gear Selection Forward-Neutral-Reverse.
Gear Reduction Ratio, 2.15:1.
Gear Type, Spiral Bevel Gears.
Clutch Type, sliding Dog.
Propeller Drive System, Splined Rubber Hub.
Lubricant Type, Premium Gear Lubricant.
Capacity,195ml (6.6 oz.)

Horsepower (Model 4/Sailpower) 4 @ 5000 RPM.
RPM Range at Full Throttle, 4500-5500.
Engine Weight (Short Shaft), 20kgs (48 lbs.).

Y si, es un dos tiempos.