Reply To: Mercury KE4 impeller help needed

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Although the subject at hand is removing the cover to access the impeller. it should be kept in mind that the entire gear should be evaluated first. Gear cases lead a hard life because they are in water
and water gets into them. Frost cracks, failed seals, water in
gear lube ruin gears / bearings and stuck covers are
issues resulting from time, water and wear.
If you have limited experience and a desire to learn, junk KE4 and Mark7are common, inexpensive and excellent ways to practice your technique and gain understanding. The gear cases vary in detail
among rhe KE4 thru KG4 series due to changes in drive shaft and
prop shafts. Be like a doctor, learn from a deceased how to work on
the living.