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Old 23 September 2013, 16:39   #11
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its strange that kerosene was used in petrol engines as kerosene which is basically the same as jetA1 fuel, has very similar properties to diesel - which as we know doesnt work in a petrol. jetA1 is at times used to power diesel engines such as airport vehicles.
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Old 23 September 2013, 16:57   #12
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its strange that kerosene was used in petrol engines as kerosene which is basically the same as jetA1 fuel, has very similar properties to diesel - which as we know doesnt work in a petrol. jetA1 is at times used to power diesel engines such as airport vehicles.
Kerosine engines with carburettors usually have a slightly lower compression than normal petrol engines & need to be very hot before you can swap over from petrol to Kerosine / paraffin or like the old T.V.O. ( tractor vaporising oil ) engines often the fuel / carb is preheated by the exhaust or hot water
Diesel engines inject or atomise the fuel similar to jet engines rather than having carbs . Me old outboard was just like a standard Yamaha 15 2 stroke but had a lower cylinder compression & the timing was slightly different , think the thermostat ran hotter , the carb float chamber was heated by a hot water pipe from the cooling water , also had 2 fuel pumps back to back & 2 float chambers it tended to leave an oily sooty film all around the stern of the boat .
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Old 23 September 2013, 17:10   #13
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I had a dual fuel Yamaha 15 hp kerosine outboard but although Kerosine's used in jet engines it's not used as av gas in petrol aircraft as it's more like a refined Paraffin in fact I used paraffin in the outboard as it was easier for me to get paraffin from my local blacksmiths . RAF boats that used aviation fuel in the Napier sea lion ( marine version of the aircraft engine ) in most cases the bad or poor starting was down to the wrong size cartridges issued for the Coffman starter this had gone on for many years before the issue was resolved.

Ok, Ok, I am impressed

Even though you knew that the engineer was going to (try) start the engines it still frightened the crap out of you
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Old 23 September 2013, 17:11   #14
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its strange that kerosene was used in petrol engines as kerosene which is basically the same as jetA1 fuel, has very similar properties to diesel - which as we know doesnt work in a petrol. jetA1 is at times used to power diesel engines such as airport vehicles.
Flashpoint of kero is approx half (in degrees C before anyone starts quoting Kelvin ) of the flashpoint of diesel.
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Old 24 September 2013, 07:53   #15
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I was a little bit concerned that the serial number has beeen removed at some point, do you think that it makes much difference?
I would guess at that size and age, probably not. For 100-ish as a buyer as long as it ran I would be happy - if it was a 300Hp 2013 MY Opti I might be a bit more suspicions..... But that's just me!


Based on your profile - it would likely be a perfect aux for your SIB!
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Old 24 September 2013, 08:31   #16
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I would guess at that size and age, probably not. For 100-ish as a buyer as long as it ran I would be happy - if it was a 300Hp 2013 MY Opti I might be a bit more suspicions..... But that's just me!


Based on your profile - it would likely be a perfect aux for your SIB!

Must admit it crossed my mind more than once but I have my eye on a Mariner (or 2 ) 4hp 2st s/s

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