| Author | Message | ||
     bruce shipp |
MY S55 is stalling after running fine for 20-30 minutes. At full power it will start to surge and eventually start to die. As soon as I pull it back to idle, it stops surging and idles fine. It will accelerate back to full power but then start to surge and stall again after a few seconds. Carb has been rebuilt, new fuel bowl, new coil, new ingintion wires. I haven't messed with the distributor yet. Could it be the condesor? Otherwise I've been happy. Doing lots of dirt work with a 6' box blade and just got an 8' disk harrow today that pulled fine (right up to the time the engine acted up anyway). Thanks in advance for the help. Bruce | ||
| H. Deckler |
Sounds like fuel starvation to me, Does it help to pull the choke when it starts to die? Do you have a good stream of fuel at the carb. (when line is removed from fitting), Is the cap on the tank letting air into the tank? vent in cap could be plugged or wrong cap. Let us know. Harry | ||
| Tom Anderson |
1-23-04 Bruce, Mine did the same thing a few years ago, but I can't for the life of me remember what I believed (at least at the time) resolved it. I do know that my own work-up did include plugs, points, condenser and distributor cap in addition to what you have done. Also, do you have cooper or rubber fuel line? At some point, I converted mine to rubber but, when my mechanic chuckled when I told him, I went home and renewed my tube bending skills and put cooper back on. I was working under the suspicion of vapor lock, which I was told by an old timer told me was pretty far fetched. Of course, a restriction in a bent or pinched fuel line could cause your symptons. I hope that one of the pros on this site is going to give you a simple solution. Tom Anderson | ||
| Chris Losey (Admin) |
I agree with Harry, it sounds like fuel starvation. If you are getting a good flow out of the line at the carb, try giving the carb a tap with a soft hammer, the float may be sticking. I had this happen with my Super 55 last summer. The gas had gone a little bad, and the float would stick. A little knock on the carb would let the float down. Some fresh gas and some sea foam got it straightened out. Also, if your float is bent and touching the side of the carb, it will keep it from moving properly. It also doesn't take much of a piece of crud in the seat to restrict fuel flow. And check that gas cap, it's an easy fix. | ||
| M_lappin (M_lappin) |
Like Chris said, check the cap, our 2255 did the same thing a few years ago, alomost same problem, cap wasn't quite plugged, but just enough to built a vacuum after a hour or so. | ||
| Bruce shipp |
Thanks, folks. I haven't had a chance to run it this week. Hopefully tomorrow. I'll check the cap first-that sounds like a likely source. Everything else in the fuel system is brand new or freshly overhauled. I'll keep you posted. | ||
| Bruce shipp |
Thanks, folks. I haven't had a chance to run it this week. Hopefully tomorrow. I'll check the cap first-that sounds like a likely source. Everything else in the fuel system is brand new or freshly overhauled. I'll keep you posted. | ||
| Bruce Shipp |
Here is the update on teh mysterious stalling Super 55. It started acting up after about 25 minutes of mowing. I pulled the gas cap as suggested but to no avail. I shutdown, rechecked all I could think to, and started mowing again. I was off for about 3-5 minuts. This time it ran for 5 minutes before surging and stalling. This time I tried the more scientific approach. I pulled out a rubber mallet and "gently" started tapping on the side of the carb. Lo' and behold, not only did the surging stop, but the rpms actually increase above where they had been. Remember, this problem only appeared at full throttle and the surging would subside at idle and it would chug along just fine. So, I have either a stuck float, crap in the bowl/needle seat or both. I'll pull the carb soon and clean things out, but for now, I carry the hammer in my pocket, and when it acts up, I show it a little love and all is well. Thanks again for pointing me in the right direction. As for pulling the carb, are there any manuals available on line to show me how to get things back together? If not, are there any "gotchas" to watch out for when servicing one of these carbs? Thanks. Bruce | ||
| Bob |
I would try a bottle or 2 of Gumout,it's saved me alot of times from having to pull a carb. Bob | ||
| Bruce Shipp |
I pulled the carb and all was clean inside. I did notice that two of the bowl screws were loose. Perhaps it was sucking air? I haven't run it for long after putting the carb back on. It's got to stop raining first... Bruce |
