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Antique Gas Engine Discussion

Oiler question

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Old 06-25-2005, 09:55:43 PM
Greg Shipley Greg Shipley is offline
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Question Oiler question

for some time I have been rather confused by the number scheme on oilers,
what does a #1 or #2 oil mean? Here is my problem, I have need for some oilers for various engines, I know the thread size, can this be used to size the oiler?
thanks for the site harry.
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Old 06-26-2005, 08:45:01 AM
bimjy bimjy is offline
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Default Re: Oiler question

Greg, Not positive but I believe the number refers to how much oil the oiler holds. I have also come to realize the there are regular oilers and there are ones with a check ball in the bottom to stop any back pressure from blowing the oil out the top of the oiler. These are needed to oil some engine cylinders. Sorry I can't help you more, but it's a start! Jim Hunter
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Old 06-26-2005, 09:31:52 AM
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Jebaroni Jebaroni is offline
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Default Re: Oiler question

I think bimjy has it right. Along the same lines, if you go to some of the websites of folks that sell oilers, most of them will have dimensions of the glass OD to give you a reference point for how big the oiler is. My 2hp engine came with a #2 oiler and I think i'll put the same on my 2-1/2 hp Alamo. They look about right for the size of the engine. It would be nice if somewhere there was a list of which oilers came with which engines and what size was used. Outside of that, it's mostly just rule-of-thumb and whatever "Looks about right".
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Old 06-26-2005, 10:12:22 PM
Gasengn Gasengn is offline
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Default Re: Oiler question

Most 1 1/2 and 2 HP engines use a number 1 1/2 oiler with 1/4" npt threads.
2 1/2 to 4 Hp engines usually use a number 2 oiler with 3/8" npt. Each oiler for a gas engine ought to have a vent tube and a check ball.
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Old 06-28-2005, 02:12:04 PM
Joe Morris Joe Morris is offline
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Default Re: Oiler question

Oilers WITHOUT a check ball and vent tube are machine oilers where no pressure is involved. however they will work alright on most engines but not all of them, especially those with a lot of blowby. Machine oilers are still used on the escolators in our local shopping mall. Also , on the engine oilers they have an airtight filler cap whereas the machine oilers have a slideaway lid on the filler hole. Joe morris
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Old 06-28-2005, 09:24:21 PM
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Larry Evans Larry Evans is online now
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Default Re: Oiler question

Attached is a scan from a 1908 Lunkenheimer catalog. This particular list is from the listing for the crown swing top oiler but the dimensions, numbering system, capacities, etc. seem to be the same for the other drip oilers also. Of course other suppliers could have used different numbering systems. This table shows pipe thread size, glass size, capacity in ounces, etc. Hope it helps.

Larry Evans
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