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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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OT - question about B&S OHV engine
A B&S 11hp OHV engine followed me home from the dump (it looked so new
that I just couldn't not bring it home). It wouldn't turn over (BAD sign), but there was no sound of a rod flopping around (good sign). I took out the spark plug and oil *poured* out! Took off the carb float bowl & it was full of oil! Looking better - this is probably minor, operator error, even. The fuel line goes through this device: http://home.comcast.net/~bobengelhardt/B&Spart.jpg & there is also a hose into it from the oil fill tube. This other hose is connected to the oil fill tube well above the normal oil level. There is a separate PCV valve with a hose into the carb, as is usual with B&S engines. So what does this mystery device do? And could it provide a path for oil into the carb? Thanks, Bob |
#2
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OT - question about B&S OHV engine
It's a _fuel pump_. It must use crank case pressure pulses to work a
diaphragm. Gentle pressure on the input didn't cause any air out of the fuel ports, so the diaphragm is probably not ruptured. And the mystery of oil in the float bowl is not any closer to being solved sigh. Bob |
#3
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OT - question about B&S OHV engine
"Bob Engelhardt" wrote in message ... It's a _fuel pump_. It must use crank case pressure pulses to work a diaphragm. Gentle pressure on the input didn't cause any air out of the fuel ports, so the diaphragm is probably not ruptured. And the mystery of oil in the float bowl is not any closer to being solved sigh. Bob Oil in the float bowl and everywhere else sounds like somebody (over)pickled the engine for long-term storage. If it was a '67 MG engine, I'd tell you to look at the EGR valve. They tended to convert themselves into oil pumps that fed into the intake manifold. g -- Ed Huntress |
#4
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OT - question about B&S OHV engine
"Ed Huntress" wrote in message ... "Bob Engelhardt" wrote in message ... It's a _fuel pump_. It must use crank case pressure pulses to work a diaphragm. Gentle pressure on the input didn't cause any air out of the fuel ports, so the diaphragm is probably not ruptured. And the mystery of oil in the float bowl is not any closer to being solved sigh. Bob Oil in the float bowl and everywhere else sounds like somebody (over)pickled the engine for long-term storage. If it was a '67 MG engine, I'd tell you to look at the EGR valve. They tended to convert themselves into oil pumps that fed into the intake manifold. g -- Ed Huntress Correction, that was the positive crankcase ventilator, not the EGR. '67s didn't have EGRs. -- Ed Huntress |
#5
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OT - question about B&S OHV engine
On Aug 30, 9:21*pm, Bob Engelhardt wrote:
A B&S 11hp OHV engine followed me home from the dump (it looked so new that I just couldn't not bring it home). It wouldn't turn over (BAD sign), but there was no sound of a rod flopping around (good sign). *I took out the spark plug and oil *poured* out! *Took off the carb float bowl & it was full of oil! *Looking better - this is probably minor, operator error, even. The fuel line goes through this device:http://home.comcast.net/~bobengelhardt/B&Spart.jpg & there is also a hose into it from the oil fill tube. *This other hose is connected to the oil fill tube well above the normal oil level. There is a separate PCV valve with a hose into the carb, as is usual with B&S engines. *So what does this mystery device do? *And could it provide a path for oil into the carb? Thanks, Bob For the sake of saving space in my shed, I made the mistake of hanging my Honda lawnmower on the shed wall for the winter so that the normally vertical engine was horizontal. The carb flooded with oil. After cleaning and reassembly, it ran fine |
#6
Posted to rec.crafts.metalworking
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OT - question about B&S OHV engine
Denis G. wrote:
For the sake of saving space in my shed, I made the mistake of hanging my Honda lawnmower on the shed wall for the winter so that the normally vertical engine was horizontal. The carb flooded with oil. After cleaning and reassembly, it ran fine I've had that happen too. The oil comes through the PCV valve & hose, into the carb. What a mess. I'm pretty sure that wasn't what happened to this engine though. First, the PCV hose didn't have oil in it & second, the carb float bowl had oil in it & that wouldn't happen if the oil came from the PCV valve (it would have to flow down the main jet & I don't think that it would do that). Anyhow, it's cleaned up & running now. But still a Mystery. Bob |
#7
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OT - question about B&S OHV engine
On Mon, 31 Aug 2009 11:58:16 -0400, Bob Engelhardt
wrote: Denis G. wrote: For the sake of saving space in my shed, I made the mistake of hanging my Honda lawnmower on the shed wall for the winter so that the normally vertical engine was horizontal. The carb flooded with oil. After cleaning and reassembly, it ran fine I've had that happen too. The oil comes through the PCV valve & hose, into the carb. What a mess. I'm pretty sure that wasn't what happened to this engine though. First, the PCV hose didn't have oil in it & second, the carb float bowl had oil in it & that wouldn't happen if the oil came from the PCV valve (it would have to flow down the main jet & I don't think that it would do that). Anyhow, it's cleaned up & running now. But still a Mystery. Bob Perhaps someone tried to run it with an old old can of 2 cycle oil premixed and the gas had evaporated? Gunner Whenever a Liberal utters the term "Common Sense approach"....grab your wallet, your ass, and your guns because the sombitch is about to do something damned nasty to all three of them. |
#8
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OT - question about B&S OHV engine
Gunner Asch wrote:
Perhaps someone tried to run it with an old old can of 2 cycle oil premixed and the gas had evaporated? I don't think so - there was a couple of ounces of pure oil in the cylinder. And the gas in its tank was OK. Maybe it *was* through the PCV valve. Maybe the machine rolled onto its side, with the engine running. Oil was pushed through the PCV valve by crankcase pressure & carb vac & drawn in the cylinder. The oil in the float bowl did have some gas mixed in (i.e., it wasn't as pure oil as in the cylinder), so maybe it had come through the main jet. This is sounding like the most plausible scenario. It's running great now. Since it was just the engine at the dump & not the whole "mower", the owner probably bought a new engine for $500 or more. Sucker. Bob |
#9
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OT - question about B&S OHV engine
On Mon, 31 Aug 2009 05:55:20 -0700 (PDT), "Denis G."
wrote: On Aug 30, 9:21*pm, Bob Engelhardt wrote: A B&S 11hp OHV engine followed me home from the dump (it looked so new that I just couldn't not bring it home). It wouldn't turn over (BAD sign), but there was no sound of a rod flopping around (good sign). *I took out the spark plug and oil *poured* out! *Took off the carb float bowl & it was full of oil! *Looking better - this is probably minor, operator error, even. The fuel line goes through this device:http://home.comcast.net/~bobengelhardt/B&Spart.jpg & there is also a hose into it from the oil fill tube. *This other hose is connected to the oil fill tube well above the normal oil level. There is a separate PCV valve with a hose into the carb, as is usual with B&S engines. *So what does this mystery device do? *And could it provide a path for oil into the carb? Thanks, Bob For the sake of saving space in my shed, I made the mistake of hanging my Honda lawnmower on the shed wall for the winter so that the normally vertical engine was horizontal. The carb flooded with oil. After cleaning and reassembly, it ran fine I winter my mowers under the picnic table (canoe on top) after running them dry. In spring, if they don't start after two pulls, I do nasty things like replacing the diaphragm. Of course, I have never paid more than $15 for a mower, most are free. Gerry :-)} London, Canada |
#10
Posted to rec.crafts.metalworking
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OT - question about B&S OHV engine
On Mon, 31 Aug 2009 11:58:16 -0400, Bob Engelhardt
wrote: Denis G. wrote: For the sake of saving space in my shed, I made the mistake of hanging my Honda lawnmower on the shed wall for the winter so that the normally vertical engine was horizontal. The carb flooded with oil. After cleaning and reassembly, it ran fine I've had that happen too. The oil comes through the PCV valve & hose, into the carb. What a mess. I'm pretty sure that wasn't what happened to this engine though. First, the PCV hose didn't have oil in it & second, the carb float bowl had oil in it & that wouldn't happen if the oil came from the PCV valve (it would have to flow down the main jet & I don't think that it would do that). Anyhow, it's cleaned up & running now. But still a Mystery. Bob 19 years ago, I bought a mower for $5, brought it home, dumped the water out of the gas tank, filled it with gas and it started on the second pull. I gave it away this summer to a friend of my DiL , I figured I had got my money's worth of fun out of it and her riding mower wouldn't fit through the ate of her new home! Gerry :-)} London, Canada |
#11
Posted to rec.crafts.metalworking
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OT - question about B&S OHV engine
Bob Engelhardt wrote:
It wouldn't turn over (BAD sign), but there was no sound of a rod flopping around (good sign). I took out the spark plug and oil *poured* out! Took off the carb float bowl & it was full of oil! Looking better - this is probably minor, operator error, even. My mom, who didn't know any better, filled her lawnmower to the top of the filler neck. There was oil everywhere. Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
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