Mercury 50 Hp 2 Stroke Compression - What could be the reasons and solutions for a 50hp mercury outboard 2 stroke motor that the middle cylinder compression is much lower than the other 2? The serial number on the thing stumps me and maybe the previous owner too, he told me it was a 1986 model, but from i read mercury 50 2 strokes were 3 cylinders in 1986. 2006 mercury 50hp 2 stroke compression i was just wondering what was the compression of these engines when they came from the factory. I just bought a boat with this engine and when. Most will produce cranking compression readings in the 90 to 105 psi range,. It would run fine. Mercury outboard compression forum topics. Mercury outboard parts powerheads. Mercury outboards by horsepower 2. 2 hp 3 hp 3. 3 hp 3. 5 hp 3. 6 hp 3. 9 hp 4 hp 4. 5 hp 5 hp 6 hp. I was just wondering what was the compression of these engines when they came from the factory. I just bought a boat with this engine and when doing the compression test all. What should compression be on 50 hp 4 stroke mercury? 155 lbs on all cylinders. Dealer replied should be over 200 per cylinder. May depend somewhat on. Recently purchased a 2000 16 sylvan aluminum fishing boat with a 50 hp mercury 4 stroke engine, model # 50 elpt 4s. Engine starts easy and runs smooth. Its an older unit but not many hours on it. 3 cylinder 2 stroke. All 3 spark plugs replaced, carbs pulled apart and gone through, float heights set, all jets are clean and clear.
What could be the reasons and solutions for a 50hp mercury outboard 2 stroke motor that the middle cylinder compression is much lower than the other 2? The serial number on the thing stumps me and maybe the previous owner too, he told me it was a 1986 model, but from i read mercury 50 2 strokes were 3 cylinders in 1986. 2006 mercury 50hp 2 stroke compression i was just wondering what was the compression of these engines when they came from the factory. I just bought a boat with this engine and when. Most will produce cranking compression readings in the 90 to 105 psi range,.