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zenith stromberg 175 cd
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poolboy
Yoda
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Tom, I've got this stuff we use on pool pump seals and valve O-rings.
It's Dow Corning 111. Basically its a thick silicone compound, about as thick as Vasoline
You can get it here among other places, a lifetime supply of 5 ounces,
https://www.amazon.com/Dow-Corning-Valve-Lubricant-Sealant/dp/B000LDLGEU/ref=pd_sbs_indust_1
It's Dow Corning 111. Basically its a thick silicone compound, about as thick as Vasoline
You can get it here among other places, a lifetime supply of 5 ounces,
https://www.amazon.com/Dow-Corning-Valve-Lubricant-Sealant/dp/B000LDLGEU/ref=pd_sbs_indust_1
SkinnedKnuckles
Jedi Trainee
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mtlman8 said:
Probably not. Usually the bronze shaft takes the wear.
TR3driver
Great Pumpkin - R.I.P
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You don't need a $100 reamer even if you do need to rebush!
https://www.chicagolandmgclub.com/driveline00/1001/jasw.html
https://home.comcast.net/~rhodes/Tech_Carb_Bushing_Reaming.pdf
https://www.chicagolandmgclub.com/driveline00/1001/jasw.html
https://home.comcast.net/~rhodes/Tech_Carb_Bushing_Reaming.pdf
NO MORE THROTTLE SHAFT LEAK! But it still won't run.fuel pump is new and electric (2.5 -4.5psi) carbs have been rebuilt. It wants to run, it fires but won't run, but if i lift the piston in the first carb (how high does'nt seem to matter)it will run for about 10 to 15 seconds. i'm pretty darn sure the floats are set correct, but i'm stuck... please help!
poolboy
Yoda
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The fuel pressure is a little higher than recommended for those carbs. 1.5 to 2.5 is recommended. are there symptoms of flooding ?
Remove the air filters and look into the carbs while the fuel pump is running. If you see gas coming out of the jet when the pump but not the engine is running, it's flooding.
Eliminate that possibility before proceding with other troubleshooting.
Remove the air filters and look into the carbs while the fuel pump is running. If you see gas coming out of the jet when the pump but not the engine is running, it's flooding.
Eliminate that possibility before proceding with other troubleshooting.
OK! went and bought the correct fuel pump today. 1.5-2.5 psi. tested it and it is putting out 2.5psi, but it still wants to run but won't, again if I lift the piston in the first carb I can get her to run for about 10-15 seconds... WHAT GIVES????could it be timing? it fires and you can hear it wants to start but won't.
TR3driver
Great Pumpkin - R.I.P
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Lifting the piston leans the mixture without changing the timing; so it sure sounds like it is way too rich for some reason.
Are you sure the pistons are installed the right way around? There are tabs on the rubber diaphragm that should match notches in the piston & body, but sometimes they get overlooked. A diaphragm with a hole or crack would cause problems, too.
If I recall correctly, the ZS carbs on a 4A would have a "cold start bar", that would cause the mixture to be way rich if it were turned to the "choke" position.
Maybe the float is "sunk" (meaning it has absorbed fuel and become too heavy to hold the float valve closed when the bowl is full).
I don't recall offhand how the float bowl vents are routed on a 4A, but you need to be certain they are open to the atmosphere.
Are you sure the pistons are installed the right way around? There are tabs on the rubber diaphragm that should match notches in the piston & body, but sometimes they get overlooked. A diaphragm with a hole or crack would cause problems, too.
If I recall correctly, the ZS carbs on a 4A would have a "cold start bar", that would cause the mixture to be way rich if it were turned to the "choke" position.
Maybe the float is "sunk" (meaning it has absorbed fuel and become too heavy to hold the float valve closed when the bowl is full).
I don't recall offhand how the float bowl vents are routed on a 4A, but you need to be certain they are open to the atmosphere.
poolboy
Yoda
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Here's a handy link for basically the same carbs with a little more emission components.
https://buckeyetriumphs.org/technical/Carbs/CarbsI/CarbsI.htm
https://buckeyetriumphs.org/technical/Carbs/CarbsI/CarbsI.htm
R
RonMacPherson
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and that Dow Corning is the PERFECT lube for non rubber suspension bushings....
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