I'll run through the basic's for you here. First off, remove the gearcase. Shift engine into forward gear and remove the trim tab. The retaining bolt is located under the round plastic cover on the rear of the exhaust housing, just over the trim tab. Remove the nut located in the trim tab recess just forward of the trim tab retaining bolt. Remove the three remaining nuts, one underneath the anti-ventilation plate, and one on each side of the gearcase. Check to make sure the speedometer feed tube, if so equipped, is disconnected. Slide gearcase down and away from engine and secure in a repair stand or other suitable repair fixture. Secondly, remove the three nuts securing the water pump housing to the gearcase. While turning the driveshaft clockwise, as viewed from the top, pull up on the water pump housing cover. Slide the cover and the rubber impeller up and off the driveshaft, be careful to retain the impeller drive key, located on the driveshaft, inside the impeller. Remove the impeller wear plate and upper and lower plate gaskets. Clean all gasket material from water pump base. Unless seals are to be replaced, leave water pump base in place. Install new wear plate and gaskets, impeller and drive key. Inspect the cup inside the upper housing for wear, replace if nessessary. Spray some lube, WD 40 or equivalent, into upper housing, and on the impeller. Slide the housing down the driveshaft until it makes contact with the impeller. While turning the driveshaft clockwise, push down on housing until the impeller is fully loaded into the upper housing cup. Replace water pump housing washers and nuts, snug, do not over tighten. Grease splines on top of the driveshaft and the shiftshaft, also the mounting studs on the gearcase and the exhaust housing. A small amount of lube on the water tube is good also. Making sure you are in forward gear, the prop will turn clockwise when you turn the driveshaft clockwise, slide gearcase back on the exhaust housing. Use care to guide water tube into the pump housing, also the lower shiftshaft into the upper. Reinstall mounting nuts, trim tab and cap.
70 horse 1985 mercury outboard
The dry weight of a 1985 model, 25hp Mercury outboard is 105 lbs.
The dry weight of an 1985 model, 75 hp Mercury outboard is 265 lbs
The dry weight of a 1985 model, 40 hp Mercury outboard is 152 lbs.
An 1985 model, 25 hp Mercury outboard requires a 50:1 fuel, to 2 cycle oil ratio.
A 35hp Mercury outboard, serial number A184641, 1985 year model.
A 35 hp Mercury outboard, serial number A152966, would be a 1985 year model.
The dry weight of an 1985 model, 75 hp Mercury outboard is 265 lbs.
A 50 hp Mercury outboard, serial number A101119 is a 1985 year model.
A 7.5 hp Mercury outboard, serial number 7193904, would be a 1985 year model.
A 50 hp Mercury outboard, serial number A159823, would be a 1985 year model.
The 1985 model, 70hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
ngk buhw2 or ngk buhw
80 lbs i just bought one on ebay..
Merc's use a 50:1 mix
Two items are needed to determine the year model of a Mercury outboard, the serial number and the horsepower rating. From the information given above, all I can determine is a pre 1985 model.
If your engine is a 4 cylinder model, it is a 1985. If it is a 3 cylinder model, it is a 1986.
As close as I can tell, the 75 hp Mercury outboard, serial number 9436217 would have been manufactured in late 1985, since the 1986-on models, were six digit serial numbers with an "A" prefix.
The dry weight of a 30hp Johnson outboard, 1985 model is 123 lbs.
What is the weight of a 4.5hp Johnson Outboard