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Hit & Miss Gas Engine Discussion

Economy 2 1/2 E valves


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  #1  
Old 01-18-2013, 10:44:27 AM
jackel440 jackel440 is offline
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Default Economy 2 1/2 E valves

I am looking at my engine and I see the exhaust valve has threads on the stem,but the intake doesn't.The valve has 2 holes which had cotter keys through them.The first hole held the spring and retainer,and then the second hole held the steel bracket that spans the center pin on the head to the other valve.Here is a pic of the head still together as I got it.I am not sure if this is the correct way or if it is supposed to have jam nuts on the exhaust stem.
There was no nuts on the stem.Is there supposed to be?Are they supposed to preload the spring even more if they are?


I am trying to figure out if I am missing parts or if this is how my engine is supposed to be?Thanks guys
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Old 01-18-2013, 11:06:55 AM
Kevin O. Pulver Kevin O. Pulver is offline
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Default Re: Economy 2 1/2 E valves

It's correct as shown.
the "Steel bracket" is an "anti flutter" arrangement. When the exhaust is latched open, it puts more spring pressure on the intake valve to keep in from fluttering while the engine is coasting. Most are gone, and it doesn't affect running, but it's nice to have them original looking.
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Old 01-18-2013, 01:17:31 PM
jackel440 jackel440 is offline
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Default Re: Economy 2 1/2 E valves

Ok,that sounds good Kevin.I was out in the shop this morning and my son was helping me pull the studs out of the cylinder andI was explaining engine theory and what we need to do to our engine.We are taking the cylinder to get it sleeved to day.I looked at my exhaust stem again and it is not threaded.Looks like it was perhaps put in a vice and it left marks on both sides.So for some reason I was thinking it was threaded
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Old 01-18-2013, 03:05:03 PM
Kevin O. Pulver Kevin O. Pulver is offline
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Default Re: Economy 2 1/2 E valves

Some are threaded, so I didn't doubt your description. That will be one good running engine when you are done, and no doubt very educational for your son.
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