" My 1986 merc 115 appeared to
" My 1986 merc 115 appeared to be running fine at the begining of the season, the compression is @ 125-130 on all 6; It was becoming increasingly hard to start cold, so I replaced the plugs, and noticed that they appeared to be all slightly wet-fouled.
It didn't seem to run as well with the new plugs, although they were the factory specified brand & model (champ L76V), and the ones I took out were not (they were NGK plugs used for the V6's). It was running fine, and I continued to use it for another 5-10 hours.
Then out of the blue it began to try to stall, and at times would refuse to come above a high idle, which I attributed to a fuel issue. This problem was inconsitent, on and off, it would run fine, then I would shut it down, start it back up in an hour, and then I would need to pump the bulb to keep it running.
I found a leeky plasic inline fuel filter, took it out, and have checked all the lines thoroughly. The fuel pump seemed to be a little weak (but working), so I rebuilt it (didn't seem to pump any stronger, but does pump when I kick it over). If I disconnect the line at the carbs and pump the bulb there is a perfect stream of fuel coming out.
After doing the work I described I tested it out, and now it idles fine, but when I give it a hard throttle out of an idle (in gear), it bogs and dies out. It will start right back up, and if I bring it up slow it runs perfect. It still seems as if I have lost a little throttle, but the rpm's will come up to 6,000 +, just as if it was tuned down a little.
To add, when I pump the bulb up until it is hard, I get fuel leaking out of the carbs, which I want to say is normal, is it? After reading the ignition part of my manual, it states that you must ground the spark plug leeds before turning over the motor to avoid damaging the coils (merc ignition type III) - could I have screwed up something in the ignition? Or do you think I should move on to the carbs? - I re-checked the compression, which was fine, but now the plugs all appear to be a little gummy, not disgusting, but not wet anymore, Any thoughts? "
" My 1986 merc 115 appeared to be running fine at the begining of the season, the compression is @ 125-130 on all 6; It was becoming increasingly hard to start cold, so I replaced the plugs, and noticed that they appeared to be all slightly wet-fouled.
It didn't seem to run as well with the new plugs, although they were the factory specified brand & model (champ L76V), and the ones I took out were not (they were NGK plugs used for the V6's). It was running fine, and I continued to use it for another 5-10 hours.
Then out of the blue it began to try to stall, and at times would refuse to come above a high idle, which I attributed to a fuel issue. This problem was inconsitent, on and off, it would run fine, then I would shut it down, start it back up in an hour, and then I would need to pump the bulb to keep it running.
I found a leeky plasic inline fuel filter, took it out, and have checked all the lines thoroughly. The fuel pump seemed to be a little weak (but working), so I rebuilt it (didn't seem to pump any stronger, but does pump when I kick it over). If I disconnect the line at the carbs and pump the bulb there is a perfect stream of fuel coming out.
After doing the work I described I tested it out, and now it idles fine, but when I give it a hard throttle out of an idle (in gear), it bogs and dies out. It will start right back up, and if I bring it up slow it runs perfect. It still seems as if I have lost a little throttle, but the rpm's will come up to 6,000 +, just as if it was tuned down a little.
To add, when I pump the bulb up until it is hard, I get fuel leaking out of the carbs, which I want to say is normal, is it? After reading the ignition part of my manual, it states that you must ground the spark plug leeds before turning over the motor to avoid damaging the coils (merc ignition type III) - could I have screwed up something in the ignition? Or do you think I should move on to the carbs? - I re-checked the compression, which was fine, but now the plugs all appear to be a little gummy, not disgusting, but not wet anymore, Any thoughts? "