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Engine I.D. (Norvel's ?)

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Engine I.D. (Norvel's ?)

Old 04-05-2011, 12:36 PM
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SunnyFlyer09
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Default Engine I.D. (Norvel's ?)

Can someone help ID these? I am missing the needle valve on one....would they be interchangeable?
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Old 04-05-2011, 12:40 PM
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SunnyFlyer09
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Default RE: Engine I.D. (Norvel's ?)

More pics

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Old 04-05-2011, 05:28 PM
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gcb
 
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Default RE: Engine I.D. (Norvel's ?)

They are either AME or Big Mig NORVELS. If you look into the exhaust or remove the head, you will see either three large ports on the bypass side indicating the more powerful AME, or five smaller ports for the Big Mig.

The piston/cylinder is ABN (pre-Revlite). The one with the (non-standard) spinner has 1.0 on the crankcase which means that it is 1.0cc or .061ci. The number on the crankcase bottom is a serial number. Note that the se numbers are only paint and will come off easily. I scratched the size on mine with a point. The easiest way to tell on the other one is to measure the bore and compare it with the 1.0cc.. If it the same it is a 1.0cc, if it is a little smaller it is the .8cc(.049ci).

If the standard NORVEL plug is not the "Freedom" plug, it will need a little more juice to glow.

Hope this helps.

George
Old 04-05-2011, 05:34 PM
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Schu
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Default RE: Engine I.D. (Norvel's ?)

I think they all use the same needle valve - .049, .061 and even the .,074 and maybe the .15 as well.
Old 04-05-2011, 09:56 PM
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DeviousDave
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Default RE: Engine I.D. (Norvel's ?)

The one with the dark cylinder is kind of rare-too bad it has been run. Norvel didn't make very many Revlite engines with the small cylinder cooling fins.
Old 04-06-2011, 04:21 AM
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Andrew
 
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Default RE: Engine I.D. (Norvel's ?)


ORIGINAL: DeviousDave

Norvel didn't make very many Revlite engines with the small cylinder cooling fins.
DD

I don't believe the engine is a Revlite. They both appear to be far too early in the series to be Revlite. Both have glued in carbs and the carbs have the early model turned intake screen retainer rings. Even in the later AAN engines, the retainer ring was replaced with a wire clip. Some of the early models have darker gold colored cylinder instead of silver. I suspect this may be one of those.

andrew
Old 04-06-2011, 06:40 AM
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gcb
 
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Default RE: Engine I.D. (Norvel's ?)

If I remember correctly, when NORVEL switched to the wire clip on the intake screen, they also started the slanted needle valve with the extended needle. I think that is also when they switched from the muffler with the straight back outlet to the rotatable one with outlet to the side. I remember the advertisement pictures showing the outlet on front of the muffler...did it even work in that position? Oh yes, the next mufflers had pressure taps.

My first Big Migs have brass needles, the muffler outlet straight back, and the plug used prior to the "Freedom" plug. These are the CL version:

George
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Old 04-06-2011, 07:54 AM
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gcb
 
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Default RE: Engine I.D. (Norvel's ?)

Well, since I have some NORVELS out I took more pics to explain some of the things discussed in this thread. These are CL versions, someone else can explain the differences on the throttle version.
Top plug is the "Freedom" plug that accepts glow drivers. The lower plug is the one prior to that. It does not accept glow drivers and needs a little more juice for glow.
Next we see the circlip on the intake screen and the side outlet on the muffler. The needle is slanted back, I think it was still straight on the throttled version.
Now we have the REVLITE version which is a hard-anodized aluminum oxide coating to last longer than ABN. One problem...the REVLITE is not conductive so you must either use a glow driver or a COX-type glow plug clip. A clip that goes on the cylinder fins will not work. Guess how I know. [&o] .
The last pic shows the pressure nipple on the muffler.
I hope these pics helped.

George
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Old 04-06-2011, 08:00 AM
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SunnyFlyer09
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Default RE: Engine I.D. (Norvel's ?)

Wow thanks guys !
Old 04-06-2011, 09:45 PM
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DeviousDave
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Default RE: Engine I.D. (Norvel's ?)


ORIGINAL: Andrew


ORIGINAL: DeviousDave

Norvel didn't make very many Revlite engines with the small cylinder cooling fins.
DD

I don't believe the engine is a Revlite. They both appear to be far too early in the series to be Revlite. Both have glued in carbs and the carbs have the early model turned intake screen retainer rings. Even in the later AAN engines, the retainer ring was replaced with a wire clip. Some of the early models have darker gold colored cylinder instead of silver. I suspect this may be one of those.

andrew

You are very likely right, here's a pic of my only small cylinder Revlight-sorry it's blurry, I should have used Macro.... and I ain't pulling all of them out to find the right box again!

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Old 04-06-2011, 09:48 PM
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DeviousDave
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Default RE: Engine I.D. (Norvel's ?)


ORIGINAL: gcb

If I remember correctly, when NORVEL switched to the wire clip on the intake screen, they also started the slanted needle valve with the extended needle. I think that is also when they switched from the muffler with the straight back outlet to the rotatable one with outlet to the side. I remember the advertisement pictures showing the outlet on front of the muffler...did it even work in that position? Oh yes, the next mufflers had pressure taps.

My first Big Migs have brass needles, the muffler outlet straight back, and the plug used prior to the ''Freedom'' plug. These are the CL version:

George

I actually prefer this style-they were lighter and make a little better power when tuned for high performance applications than the later Revlight. Just cleaner motors all around-I don't like a lot of 'fluff' on my motors and the Revlite motors were made bigger for styling reasons-not because they are prone to overheating.

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