DL-50 engine
02-26-2010, 06:17 PM
#5952
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RE: DL-50 engine
This is from Bob at DLUSA:
The average mixture settings are 1&1/2 turns out for the low speed circuit , and 1&3/4 turns out for the high speed circuit . Carburetor mixture adjustment starts with the low speed circuit. The low speed should be set such that the transition from idle to full throttle is smooth, even if the throttle is snapped to full. This will likely result in a slightly rich idle mixture but you're better off with that than a rough transition. If the engine dies when the throttle is advanced, the mixture is likely too lean. If the engine stumbles when the throttle is advanced, the mixture is likely too rich. Since the low speed mixture has some effect on high speed mixture, always adjust the high speed after adjusting the low.
The high speed circuit is properly adjusted when the engine can reach maximum rpm while in the air, which is usually slightly richer than when its on the ground. A general rule of thumb is to richen from the maximum on the ground rpm by about 200rpm. If ever the engine slows or dies while at full throttle, the high speed mixture is likely too lean and you should adjust it as soon as possible or damage can result.
The average mixture settings are 1&1/2 turns out for the low speed circuit , and 1&3/4 turns out for the high speed circuit . Carburetor mixture adjustment starts with the low speed circuit. The low speed should be set such that the transition from idle to full throttle is smooth, even if the throttle is snapped to full. This will likely result in a slightly rich idle mixture but you're better off with that than a rough transition. If the engine dies when the throttle is advanced, the mixture is likely too lean. If the engine stumbles when the throttle is advanced, the mixture is likely too rich. Since the low speed mixture has some effect on high speed mixture, always adjust the high speed after adjusting the low.
The high speed circuit is properly adjusted when the engine can reach maximum rpm while in the air, which is usually slightly richer than when its on the ground. A general rule of thumb is to richen from the maximum on the ground rpm by about 200rpm. If ever the engine slows or dies while at full throttle, the high speed mixture is likely too lean and you should adjust it as soon as possible or damage can result.
02-27-2010, 01:50 AM
#5953
RE: DL-50 engine
I have tried to find Pennzoil 2 stroke oil for air cooled engines locally (Salem, OR) and have not been able to find any. Maybe I will have to order some, but I am wondering of any of you have used these oils with satisfaction: Master Mechanic, Briggs and Stratton, and Arnold. My local True Value has those three on the shelf. I need to get my oil and gas can so I can start up the DL-50 in my RichModels Extra 330L for the first time soon! Thanks. Jon
02-27-2010, 08:50 AM
#5957
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RE: DL-50 engine
Another source for air cooled 2-stroke oil is at your local motorcycle shop. I get Amzoil there and it is a good two stroke synthetic. If these guys can use it for HARD off road biking then its gotta be good for just about anything.
Wayne
Wayne
02-28-2010, 05:24 PM
#5958
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RE: DL-50 engine
I have a Dl 50 and a 111, I am also the unfortunate, 'temporary operator' of a crrc50 pro.
I am rather scheptical regarding the manner in which we are advised to run our engines in, ie start or non synthetic oil, switching over to 'the better stuff' after a couple of gallons. I 've owned new chain saws, jets ski's, outboards, weed eaters, and a hedge trimmer. All of these things are produced and used, in far greater numbers than our Dls, and yet I have never heard of breaking them in with anything but the regular oil that is intended to be used for the life of the engine. I can see the point, but really feel that it is overkill. You buy a saw, nail it from the first start, and run it o death for 400 hours, throwing it in the shed for months on end with no attention (other than the bar and chain) and it never misses a beat , DL's are getting pampered to death !
I am rather scheptical regarding the manner in which we are advised to run our engines in, ie start or non synthetic oil, switching over to 'the better stuff' after a couple of gallons. I 've owned new chain saws, jets ski's, outboards, weed eaters, and a hedge trimmer. All of these things are produced and used, in far greater numbers than our Dls, and yet I have never heard of breaking them in with anything but the regular oil that is intended to be used for the life of the engine. I can see the point, but really feel that it is overkill. You buy a saw, nail it from the first start, and run it o death for 400 hours, throwing it in the shed for months on end with no attention (other than the bar and chain) and it never misses a beat , DL's are getting pampered to death !
02-28-2010, 07:26 PM
#5959
RE: DL-50 engine
Not mine, I treat them the way they were designed to be used, just like your description of your (and mine) chainsaw. Gotta use good oil though, no hard working, long living, 2 stroke powered outdoor equipment comes new with 1.25 oz. of Amsoil. More oil = more power, more oil = live long and prosper.
03-24-2010, 08:00 PM
#5965
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RE: DL-50 engine
Version ??? That one is all youren Jody *L* all I know is the first ones that come out had some expanded metal for standoffs that well wasn't the greatest.
03-24-2010, 10:55 PM
#5970
RE: DL-50 engine
Here are two pictures that show the difference between the old and new DLE55's. The main difference it the new cylinder is a pressure injection casting. You can recognise it by the round rod shapes on the rear fins where the aluminum was injected. It is a much cleaner casting. The DLE 30 cylinders were made this way all along. There should be a lot less complaints about casting flaws and voids with the new technology being used to manufacture their cylinders. It was nice that this feature was brought in with no increase in pricing....
03-25-2010, 06:14 AM
#5974
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RE: DL-50 engine
I was impressed to see the clean crisp ports in the 30. A far cry from the early DL50.
What's the difference between pressure die cast and pressure injection cast?
The new cylinders look like the quality of an investment casting.
What's the difference between pressure die cast and pressure injection cast?
The new cylinders look like the quality of an investment casting.