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Paw 2.5

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Old 04-20-2017, 12:23 PM
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controlliner
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Default Paw 2.5

Has anyone ever tried running a PAW 2.5 with no amil nitrate. I have an R/C version and want to run it on a 1/3-1/3-1/3 mix. What are your thoughts?
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Old 04-20-2017, 02:57 PM
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Default Unitrated Fuel

Should be fine.

However, to ensure optimum performance why not buy a quart bottle of Amsoil Diesel Cetane Boost and use that instead?

It is a very effective and inexpensive substitute and at 1.5% of the mix a bottle will last a very long time.
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Old 04-20-2017, 04:11 PM
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sounds good mate. i'll try it
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Old 04-22-2017, 03:11 PM
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I've done it and does it ever start nice on low compression. Does anyone know if the 1.49 and the 2.49 share the same crank case? My 2.49 seems quite small.
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Old 04-22-2017, 09:10 PM
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Originally Posted by controlliner View Post
I've done it and does it ever start nice on low compression. Does anyone know if the 1.49 and the 2.49 share the same crank case? My 2.49 seems quite small.
The 1.49 and the 2.49 have different crankcases. The engine capacity may be stamped inside the backplate.
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Old Yesterday, 03:01 AM
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It came in a box from Macclesfield marked 2.49. I had a 1.49 from the 1960's and it seems the same. The 2.49 seems quite anemic with an 8X6. Mabe it was put in a 2.49 box by accident? I can't see Tony making that mistake.
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Old Yesterday, 03:09 AM
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Quote:
Originally Posted by controlliner View Post
It came in a box from Macclesfield marked 2.49. I had a 1.49 from the 1960's and it seems the same. The 2.49 seems quite anemic with an 8X6. Mabe it was put in a 2.49 box by accident? I can't see Tony making that mistake.
How long is it? From tip of crank to backplate. I can duck down to the shed and measure one of mine if you can give me a distance to compare.
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Old Yesterday, 03:59 AM
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Quote:
Originally Posted by qazimoto View Post
How long is it? From tip of crank to backplate. I can duck down to the shed and measure one of mine if you can give me a distance to compare.
73 mm tip of crank to the backplate. the cooling fins are 23mm across.
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Old Yesterday, 05:32 AM
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73 mm tip of crank to the backplate. the cooling fins are 23mm across.
That's exactly the measure of my 1.49cc Paw.

The Blue Head 09 is the same length, but the cylinder fins are 25mm.

I can dig out my old 2.49 tomorrow.
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Old Today, 07:01 AM
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What is the secret in getting the backplate unscrewed on my 1.49? I used to use an old 1P coin but this one is on real tight from PAW.
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Old Today, 07:02 AM
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qaz, it is the 1.49. It is 127 grams and the measurements are the same.

Last edited by controlliner; Today at 08:17 AM.
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