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Old 01-20-2011, 04:03 PM   #11
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Re: Questions on Gasoline Engine

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This engine has ball bearings on the crank and roller bearings on both ends of the rod. The main requirement for 25:1 gas/oil mix is for the ring, the bore is chrome plated and the piston has one ring which is 2.5 mm thick the engine must not overheat or the ring may be damaged. The engine was designed like this for less ring drag and more peppy performance. The manual says that you can go to 40:1 after break in but I highly recommend 32:1, it will give the ring that extra measure of protection and you will not see any large buildup of carbon either.

Last edited by controlliner; 01-20-2011 at 04:05 PM. Reason: spelling
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Old 01-22-2011, 11:05 AM   #12
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Re: Questions on Gasoline Engine

you don,t need to put any oil down the cylinder of a gas engine as the oil left over in the engine will keep the engine internals lubed.also i just leave fuel in my fuel tanks over the winter so that the fuel tank internals will keep soft and the carb will have some fuel in it come spring time.i have been doing this for the past five years and i fly giant scale areobatic planes with no problems what so ever.if you cannot leave fuel in the truck then i would just empty out the tank and forget about it till spring,as said before no need to put oil down in the jug,this only applies to glow engines.hope this helps.

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Old 01-22-2011, 12:39 PM   #13
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Re: Questions on Gasoline Engine

Here are some good products. You can type in 'fogging oils' and get information on seasonal storage of small engines. This is what a service department would do for your lawnmower, snowblower, weedwacker, motorcycle, seadoo or outboard for off season storage.
Many of us store engines in less than ideal locations and these products were developed simply because the normal oil residue is not enough protection. I highly recommend a winter storage practice.

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Old 01-22-2011, 04:30 PM   #14
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Re: Questions on Gasoline Engine

Originally Posted by Heli-Flyer View Post
To break-in the engine, I will use the Pennzoil 2-cycle oil that is sold in Canadian Tires as some of you suggested.
Please be sure to use Air cooled 2 stroke oil and not marine. Your reference to Pennzoil as sold in CT made me think you might be going to get marine 2-stroke Pennzoil as I am very certain CT does not sell air-cooled Pennzoil. The latter has become very hard to find in Canada as I believe that Shell bought out the Pennzoil line. Used to be able to buy it at Sunoco stations but prety much out of stock now. Realistically you can use any reasonable air-cooled 2 stroke oil - Pennzoil if you can find it, RedLine, Lawn Boy Ashless, Shell. I am not sure if Stihl 2-stroke is synthetic or petroleum based but lots of guys use it also.

In general I would guess that you will have to run 3-4 litres of gas through a 28 cc engine to break it in.

Yes you do need to pay attention to needles. Most gas engines have a low speed and high speed needle. Depending on what the factory settings are for that engine, on average they would start arounnd 1 1/2 - 1 3/4 turns out from bottomed out. Somewhere close to 1 1/2 turns out on both should let you start the engine. The high speed needle is adjusted to maximum rpm's and then backed off very slightly. You don't need to run gas engines rich like our nitro ones, they should be set to run very close to peak rpm. Low speed needles are set after the high speed one to get a smooth transition without burbling or richness. The low speed needle does have a slight effect on the high one.
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