seems I have a miss in my motor. the reason why I started looking it over is because:
Last week I was out on the water and the boat was running ok then all of a sudden it falls in rpm from 5000 to 4000 and will keep at 4000 for a while. it will run wide open ok but at idle will die. so I came home put my compression tester on it and came up with 120 psi on all four cylinders. then I put the timing light on it. at idle everything seemed fine after about 1700 rpm it seems like every cylinder fires every other revolution. my timing light will blink more often at lower rpm and less often at higher rpms. then while at about 4k rpm the motor will jerk a little and I hear a weird noise sounding like a little knock it does this constantly. please clue me in. and again every cylinder does this. also what is the degree of advance at idle and WOT if you know... thanks!
1996 112 SPL XE112SLEDR
Last week I was out on the water and the boat was running ok then all of a sudden it falls in rpm from 5000 to 4000 and will keep at 4000 for a while. it will run wide open ok but at idle will die. so I came home put my compression tester on it and came up with 120 psi on all four cylinders. then I put the timing light on it. at idle everything seemed fine after about 1700 rpm it seems like every cylinder fires every other revolution. my timing light will blink more often at lower rpm and less often at higher rpms. then while at about 4k rpm the motor will jerk a little and I hear a weird noise sounding like a little knock it does this constantly. please clue me in. and again every cylinder does this. also what is the degree of advance at idle and WOT if you know... thanks!
1996 112 SPL XE112SLEDR
