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Magnum Engines XL 52 RFS Blue R/C 4-Stroke Engine

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33 Review(s)

Availability: In stock

$149.99

No. 210851

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Magnum Engines XL 52 RFS Blue R/C 4-Stroke Engine

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User's Guide (489.8 KB)This is the User's Guide for the Magnum XL .52RFS Engine

Customer Reviews

Items 1 to 10 of 33 total

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great engine all around Review by chewy
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I have few of the 52's and 70 's all great engines, zero problems and not a single dead stick.i have a 52 in a GP rapture i built years ago and the thing still after many gallons it has great power and idles like a sewing machine.Keep them clean and check/adjust the valves if needed and they will last a long time. (Posted on 9/6/14)
Very Satisfied and Impressed Review by Phalco
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I've got this little engine running on a CMP Beaver which I converted from EP to glow power. The beaver has a 70" wingspan and lots of drag with struts and a big radial engine cowl. The Magnum 52 hauls the plane around in a very scale like fashion and sounds great. It starts easy and idles very reliably. I'll confess that I didn't follow the break-in procedure very closely and did most of the break-in, while in flight. The initial break-in was done on the ground with the engine mounted in the plane just to get the approximate needle settings. With an 8oz tank and running at 60-70% throttle this engine will run for approximately 20 minutes. (Posted on 5/14/14)
Good small plane motor Review by Terry B
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I have had a Magnum 52 4stroke for years on a pete-n-poke plane and over 5 gallons of fuel through it. It is a good fit for a 40-2stroke replacement if you are looking for the 4 stroke sound. All though the motor is a little sensitive on the low end needle valve setting, it is not a hard motor to tune..,I use powermaster 15/18 fuel and 12X6 APC prop and it is a good reliable smooth idle engine.. (Run your idle mixture just a tick rich for best transition) I adjust the valves every gallon or when I think the RPM is down just a little.. These motors do not have a lot of compression when hot but start well with a starter and no problems at all on reliability! Buy one, you will like it.. If your plane is a little heavy, use a Magnum 70- 4 stroke but we have this 52 on a Great planes 40 size cub and it pulls it along at half throttle once we are at flying height.. Full throttle for take off and then cut back...
Good motor, good price. (Posted on 11/26/13)
Great engine Great price Great performance Cool sound Very dependable Review by The Gipper
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I've been using one on a Phoenix Funstar .40 for about a year and I am very happy with the performance. The engine has been very reliable, and club members often ask me what engine I'm using after a flight. I intend to buy another one, and highly recommend this engine to anybody looking for a great 4-stroke engine, with great performance, at a great price.
(Posted on 2/15/13)
Magnum and Hobby People a Great Combination! Review by Widget
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I was introduced to Magnum engines through the purchase of a very used 1.20 4 Stoke. I eventually had to rebuilt it with parts easily obtained from Hobby People, and even though it was my first time rebuilding an engine, I now have a 1.20 4 stroke that runs as good as new! Impressed, I then bought 3 Magnum 91 4 strokes and all have performed flawlessly right out of the box (with the recommended break-in of course!) And just today, I broke in my brand new Magnum 52 4 stroke, and like the rest, after a total of 45 minutes break-in time, it was ticking over at a very acceptable low idle, and was spinning the installed 11X8 APC prop at a max, steady ,10,000RPM! I could have spent an average of $200 more each on nicer looking, more popular brand named engines to impress the nay-sayers at the Flying Field, but I have found that the Magnum brand (and price!) fills all my power plant needs. I want to add that Hobby People customer service is the best and (Todd) is always right back in touch with me with the right answer whenever I ever have any technical questions. (Posted on 2/5/13)
A PAIN TO ADJUST Review by embirdman
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This is my first "Blue Head" 52...I also own a Magnum 70 I fly in my Phoenix Dacathlon, and a Magnum 40 2 stroke I fly in my Dazzler. I have had good luck with the Magnums, inspite of hearing bad things about them out at the flying field. So when I saw the good deal offer on the 52, well I jumped on it.! ....I mounted the 52 in my 80" wing Cub and began breaking it in in my backyard...here is where the fun began....now I don`t profess to be an engine genius, but I have been an RC modeler for 40 some years, starting out with Cox .049`s on UC models. I have 14 Airplanes, all glow, one gas, and one micro electric F-86. I thought I was a decent engine guy, hand flipping all of my engines, using a chicken stick on the 4 strokers.... but when I tried to start the blue head 52, well, as I mentioned, this is where the fun began. after flipping and priming until my back hurt without even a pop...I figured out that the engine was not getting a spec of fuel during the prime...this is the reason the factory low speed is set at 3 turns, to help in priming but is way way too rich for idle. So I solved my priming problem by disconnecting the muffler pressure line and connecting a 5 " piece of fuel tubing to it and blowing fuel into the carb....this alowed me to get the engine started. I then ran the engine very rich per the manual, but don`t throttle back much because the 3 turns factory setting on the low end will cause the engine to quit at a fairly high RPM. The manual does not tell you this...which would of helped me. You must lean the low end ALOT..a full turn or more to get even close to proper idle mixture. When I leaned the low end, well, priming now..(holding your finger over the exhaust with the throttle full open) was just not even going to work....but my 5" piece of fuel tubing was the answer for this. Ok then, after the 45 min break-in and a fairly good idle was attained, It was first time to fly. Again, following the manual, it said to fly at the richest setting that would produce enough power to fly. Well, that just doesn`t work because when you enrichen the high speed needle it also enrichens the low speed end ALOT...will no longer idle (not even close)...! So after I figured this out I leaned the high speed needle to max power and enricend slightly and then puleed the throttle back to idle, and the reliable idle was alot better. So I adlusted the low speed end again and was ready to try to fly again. Away the Cub went, anxious to fly after that rediculous engine adjustment ordeal. The bottom line on this engine is...once you have set your high speed needle, don`t mess with it or you`ll screw up your idle. In fact, the last time I went to fly, the Cub again would not idle, so I simply ran it up to full poer and leaned the high end again to slightly leaner, and then throttled back to check the idle and it was ok....I taxied out to fly. I must say that now I seem to be able to start the Cub and fly it each time...the blue head is running smoothe and reliable...at least so far....Would I buy another Magnum....hmmm...?
My other 4 srokers are Saito`s and OS`s...Love all of my engines, even the blue head....! (which is definately female) (Posted on 12/25/12)
runs good Review by snake
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I have 2 of these engines 1 is a 91 that I got on a edge 540 the other is a 52 that I bought at a swap meet for 15 dollars.Neither engine was running both looked new.After putting a new manifokd o ring and setting carb back to factory specs the 91 fired up.The idle was poor but a fox miracle plug cured that.Now it runs great.The 52 was pulling fuel in and pushing it back to the tank on compression.After checking the valves I went to the cam.The cam was out of time.The guy I bought it from said it had 4 flights on it and quit but I dont see how with a cam out of time After figureing out where the cam should be it ran near perfect.The 52 is a chinesse copy of the os 52 .I dont know about the 91 as I don`t have a os 91.I haven`t flown them yet but bench runing they seem great (Posted on 12/6/12)
GREAT RUNNING ENGINE Review by RMHJR
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BEST ENGINE I'VE EVERY HAD ONLY PROBLEM I CAN THINK OF IS THE LOW END IS SET TO RICH, IT TAKES 1 -1/2 TURNS LEANER TO GET A GOOD IDLE, IN OUR CLUB WE HAVE 3 SLO-POKE, ALL WITH 51'S AND THEY ALL GREAT
HAPPY FLYING (Posted on 11/16/12)
GOOD ENGINE-GOOD POWER-GREAT VALUE Review by THE GIPPER
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I recently purchased a Magnum XL52 and put it on a Phoenix Fun Star 40. Great power for this size model. To date I've got about 20 flights on the plane, and not one dead stick landing, or any other problem for that matter. It always starts easily, and I love the four stroke sound. Now that it's broken in the idle is so low and reliable that I can hardly believe it. Great engine!!!! (Posted on 10/31/12)
Great engine for price Review by Brentg
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I have two blue heads and one older version and they all start and run without issues,just breakin per instructions and fly no fiddling with settings, never had a flame out cant say that for a few of my os and saito 4s's, these engines are without doubt the best value on the market, watch for Hooby people's sales events and you can get a new engine at below used prices of the other guys, i bought a 52-4s at the toledo show and a 91-fs online before the sale went off, dont get much better than this.. (Posted on 7/3/12)

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