Petrol and Diesel Engines

[Sm shogunParticipant @smshogun38232]

[Sm shogunParticipant @smshogun38232]

How many people run the current crop of two stroke engines in models? I have done this for years and am surprised more people don't run them instead of glow engines. Look at the cost, a new chainsaw engine is cheaper than a lower powered glow engine and petrol is much cheaper than glow fuel, plus you can get it anywhere at anytime.

Recently I managed to acquire a small diesel engine of 32cc and its a cracker, it has fantastic torque and only runs at 4500 RPM flat out and idles at 550 RPM and runs on red diesel which is also free to me. This engine is a prototype unit for chainsaw and brush cutters and other similar petrol powered equipment and needs no reduction gearing for a boat. Its centrifugal clutch kicks in at 600 RPM and its torque is phenomenal.

[Amy jane SeptemberParticipant @amyjaneseptember49770]

Hi there

I'm running a 25cc two stroke petrol in this.

I agree with you, far easier and cheaper way to go than glow or electric for a fast boat!

Tell me more about your diesel, you've got me interested. is it a 4 stroke with injector pump and what all, or glorified model engine?

Thanks

Amy jane

[Sm shogunParticipant @smshogun38232]

Not a lot to say at the minute as this is a current development engine based on three classes of compact 4 stroke diesel engines, the up to 50cc class, the 50-150cc class, and the 150-250cc class; and it came through a friend.

These engines are being developed in response to the less environmentally friendly 2 stroke petrols to replace things such as chainsaw and brush cutters petrol engines with diesels which are cleaner and more fuel efficient, and replacing high revving, low torque petrols with low revving high torque diesels. They are 4 stroke with plunger pumps and they hope to replace petrol engines in items such as marine applications which of course is the humble petrol outboard and even produce small generators with them.

One of their major markets being explored is the ability to run on many oils other than diesel and this would include veg oils and palm oils which can be locally produced, particularly in third world countries where petrol quality is often poor, diluted, and dirty through transportation in containers. Basically its a multi fuel engine using the various oils as fuels.

[Amy jane SeptemberParticipant @amyjaneseptember49770]

Thanks for the info.In that application they make a lot of sense, if they can be made cheap enough. I remember reading somewhere that some forestry companies are now useing soya oil, both on the chain, and in the engine, on their chainsaws for enviromental reasons. I have in the past experimented with alternative fuels, ethanol/soya mix in my weed eaters, and running both two and four stroke engines on diesel/ petrol mix. (I used to run my old XJ6 on 50/50 petrol /diesel. Petrol in one tank, diesel/petrol in the other. Start and warm up on petrol, then flick the switch and and run on the 50/50 in the other tank, A bit smoky, but then it was smoky on straight petrol as well..).

My old two stroke johnson out board ran happily on 50/50, would even start on it!

[Sm shogunParticipant @smshogun38232]

Its all about the decline in oil and the cost of transporting it around the world, if you can produce any oil locally then you reduce the burden on fossil fuel based oils and fuels by using locally produced soya or vegetable oils, and yes you are correct about chain oil being soya based. This is solely for delicate eco systems to allow chainsaws to be used but it is a poor substitute for a good mineral chain oil. My bar was destroyed in a week of using soya based oils and the chain had worn a flat on the bottom where it sits onto the bar; normally they last at least a year with heavy use, often much longer.

The cost of replacing bars and making chains from bulk stock is minimal compared to having to employ a large team of men cutting timber down by hand and cutting it up into manageable sizes to be removed, particularly for tree management in delicate areas.

[Paul TParticipant @pault84577]

Hi Sm Shogun

As a confirmed petrol head I would love to use my collection of two stroke & four stroke engines in my boats but unfortunately most clubs / waters have banned all types of IC engines.

The only place that I can run the IC powered boats is on the local canal where I run the risk of 'interfacing' with fishermen and full size boats.

Paul

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