gas oil ratio 1971 5 hp sears boat motor

How to Change Gear Oil in an Old Outboard Motor 2/6 Vintage 1971 Sears ESKA 5hp Outboard restoration: Oil change and quick test start. TCW 3 included these old engines (1960's) in the oil spec. 1960 Sears Elgin 7.5 First Lake Run In 40 Years 1968 Sears Simpson 3.5hp outboard motor 1968 Sears 3.5 horsepower outboard motor on a 12 foot wards rowboat 1968 Sears 3.5 horse outboard motor. suffer due to the zinc being removed, not to mention friction modifiers that old style ring/bore finishes cannot deal with it.ĮDIT> I just spoke with BRP OZ and for OMC engines they said if the original spec was 25:1 then TCW3 at 50:1 is the way to go.

Old 4 strokes have problems with new oils as many compnents have been removed for emission rules and old flat tappet cam followers etc. ( Some 2 to 4hp had bushed big ends as well as late as mid 80's but all ran on 50:1) Sears Ted Williams 4-12hp Outboard Boat Motor Powerhead Vintage Tecumseh 4.5 Hp 286. The only difference in the bearings was big ends went from crowded to caged and small ends went from bushed to roller (in small engines) When there was no spec for 2 stroke oil, people used plenty and as the oil gained a spec and got better ( BIA-TCW 1, 2, and now 3) engines used less and less. De coking was something that was done to old 2 strokes but not any more. They burn way cleaner so there are little to no carbon deposits left in the engines. Sears Gamefisher 7.5 Hp Outboard Boat Motor For Sale Mint Condition built in gas tank, 2 stroke, 40lbs, tiller, air-cooled, low hours, runs excellent, This is a 7.5hp Sears Gamefisher air-cooled outboard boat motor for sale. as you are making lean/rich adjustments keep adjusting idle to keep it at a desired rpm.The oils today are made for the fuels of today.

adding or taking away fuel will change the initial idle setting. You will need to adjust idle during this procedure as well. this should be the new center adjustment, pop the knob out and reset to center, you can fine tune from there up or down. after the sneeze is gone, back off an additional 1/4 turn. when you have backed off the knob enough the sneeze will disappear. you will notice the motor will die out for a second but will continue to run, this is known as a lean sneeze. try tightening the knobs (to the right) towards lean, all the way and back off 1 1/4 turn.

The fast one is the adjustment for when you are traveling full speed and the slow one is for when the motor is idling.ĭo adjustments on the water. if the motor has too much fuel it would be considered rich, you would turn the knob to the lean side. if a motor is running lean it needs more fuel and you would turn the knob to the rich side. Rich is a term used to describe more fuel, lean is less fuel. Sears gamefisher boat w 25hp and 7.5hp - 1900 (Blacksburg) Sears gamefisher, trailer, johnson 25hp seahorse outboard, johnson 7.5 seahorse outboard, gas tank, and minn kota turbo 35.Motors run, both need tuneup.Call for more info.

Gas oil ratio 1971 5 hp sears boat motor