Hi there - I had started another thread that got me to this point, but I think the thread died. Was getting great help from ILENGINE and MowerPro2, but I haven't heard back. I'll re-post my last post from there here to try to fish for ideas: I have a Poulan Pro PR45Y22SB, B&S motor# 10G902 0260 B1. Where I'm at now -- I think I might have damaged the governor/slinger. Is this even possible? I replaced a governor link that got bent. It was VERY obvious that the old one was mis-shapen - too long, to be precise, and so was keeping the idle high when the governor was adjusted in the static position. Well, when I installed the new link, I readjusted the governor for good measure, and cranked her up to an awful racket and lots of sputtering. That's when I discovered that I wasn't careful and the throttle lever had jumped the stop before I adjusted the governor. I know - Duh. I shut her down, put the throttle lever back over the stop, and readjusted the static position, and now it runs, at a good idle speed, but it "sputters" for lack of a better word, and there is a faint noise going on, like a fishing reel. At first I described it as surging/hunting, but it's really more like a random sputter followed with a surge, almost like a misfire. It runs pretty smooth between sputters, tho, with no noise. Is it possible to damage the governor from misadjustment? Could this be a coincidence and something else actually be going on? I had read that excessive idle speed could crack the coil.... and it was running really high, like 4000rpm+ before I replaced the link. The bottom line is, it runs -- I was able to mow the yard with it, in fact, it ran better with the drive wheels engaged than at idle, and it ran better as it got warm. Any ideas before I just let it run itself into the ground? It's a ten year-old machine, but I'd like to keep her around for as long as possible. Thanks so much for any help you may be able to offer.
Damaged governor?
- Thread starter lilychef
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A while back, Briggs actually had camshafts with nylon gears, and those could give some funny noises. Keep running it as long as it runs, but pull the
top cover off for a peek first, make sure nothing is rubbing on top.
top cover off for a peek first, make sure nothing is rubbing on top.
Thanks - was trying to avoid opening it up, but might just do it, if only for fun. I think we may have mowed for the last time this season, so I certainly have the time. :laughing: Thanks!
Wait - I think I misunderstood you - the linkage moves freely, but now when I move it, there is some weird resistance inside the engine when there wasn't any before I adjusted it with the throttle lever jumped. Oops, forgot to mention that. And that's what has me worried. Possible broken cogs on the cam/slinger?
I would start by readjusting the governor. Follow the directions in this manual. If the engine continues to surge, I would say that you have one of two problems. Damaged governor when you over revved the engine or you will have to look at the carb causing your surging problems.
http://dl.dropbox.com/u/12502267/B&S Service Manuals/01_270962SingleCylinderLHead.pdf
http://dl.dropbox.com/u/12502267/B&S Service Manuals/01_270962SingleCylinderLHead.pdf
Thanks for the reply - It's a brand new carburetor - that's how the link got bent.
The whole thing was gunked up with rust from the gas tank, which I also replaced, and it was easier to just buy the assembly. And like I said, It's more like a misfire, or sputter, and it pretty much happens only at no-load idle. It actually mows ok, albeit a little sputtering... I took a peek at the governor link while it's idling, and it was moving/bouncing all over the place... Is that normal? I'm beginning to think the governor is damaged as you suggest. Is it dangerous to run it like that if so? It's my girlfriend's mower for her rental property and I don't want her to possibly get hurt by a flying chunk of crankcase... :laughing: Thanks again!How we got here is kind of irrelevant, but here's what happened. The mower wasn't starting. The primer bulb was shot, and the tank and carb were full of rust. Since I needed a new tank, I decided to pay just a bit more for the tank/carb assembly, since I didn't feel like rebuilding the carb. I accidentally bent the governor link when I installed the new tank/carb, but didn't realize it until later, when I couldn't get the motor to idle down. Rather than try to guess the correct shape/length of the old link, I bought a new one (only $6). Mind you, at this point the engine ran GREAT, just too high... Well, after installing the new link, I was confident I was finished with the whole thing, but that's when I adjusted the governor incorrectly, because the throttle lever had jumped the stop when I tightened it. That's when I started having the surging/sputtering/misfiring thing. After realizing what I had done, and fixing the throttle lever and readjusting te governor, I still have the problem, even though it's much better. That's why I was wondering if running the motor with the governor way out of adjustment could have actually damaged the governor. But the carb is new and clean, so that's not the problem. All parts are genuine OEM, btw.