I have a 2005 Mercury 50 ELTPO outboard. It is a 2 stroke, 3 cylinder, and max rpm's is 5500. It has low hours and has been maintained well since it was purchased. I have a few observations and I want to see what the board thinks. I do not think there is anything wrong, I just want some input from experts.
1. My motor cranks like a dream. I choke the motor, and lift the idle bar, and it will crank within 15 seconds. However, when I have it cranked, it has a very low idle, and sounds as though it is going to die. Even after it has warmed up for 10 minutes, it still coughs and ranges from a normal even idle, to a low cough. To add to this, it also makes a backfiring noise. I am not sure if that is the correct diagnoses, but it makes a banging noise. Opinions?
2. The engine makes a knocking noise when I put it in gear. It makes this knocking noise anywhere between beginning throttle and 3/4 throttle. Once I go to WOT, the noise stops. The knocking is quiet and not really fast, just a slow knock, knock, knock. (Wow, its hard to diagnose problems through words!)
Additional info, I recently had to replace the electronic rev limiter. I bought a new one, installed it, and the problem still exists. I am now being sent a new one to try. I have always kept the engine well oiled, and I have had no actual problems, other than the rev limiter. I appreciate all thoughts and opinions. And if anyone has this exact motor, I would love to talk in depths about the inner workings.
1. My motor cranks like a dream. I choke the motor, and lift the idle bar, and it will crank within 15 seconds. However, when I have it cranked, it has a very low idle, and sounds as though it is going to die. Even after it has warmed up for 10 minutes, it still coughs and ranges from a normal even idle, to a low cough. To add to this, it also makes a backfiring noise. I am not sure if that is the correct diagnoses, but it makes a banging noise. Opinions?
2. The engine makes a knocking noise when I put it in gear. It makes this knocking noise anywhere between beginning throttle and 3/4 throttle. Once I go to WOT, the noise stops. The knocking is quiet and not really fast, just a slow knock, knock, knock. (Wow, its hard to diagnose problems through words!)
Additional info, I recently had to replace the electronic rev limiter. I bought a new one, installed it, and the problem still exists. I am now being sent a new one to try. I have always kept the engine well oiled, and I have had no actual problems, other than the rev limiter. I appreciate all thoughts and opinions. And if anyone has this exact motor, I would love to talk in depths about the inner workings.
