The dry weight of a 1988 model, 70hp Yamaha is 233 lbs.
The 4 stroke Yamaha outboard requires a quality SAE 10W-40 motor oil.
The dry weight for a 1988 model, 20 hp Mercury outboard is 105 lbs.
The listed dry weight for a 1988 model, 70 hp Mercury outboard is 265 lbs.
1988
1988-89
The dry weight of a 1988 model 25hp Mercury outboard is listed as 105 - 112 lbs depending on the model.
dry weight is 188lbs.
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
108 lbs.
The dry weight of a 1988 model, 115 hp Mercury outboard is 312 lbs.
23 years old made in 1988
50:1