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Magnum Engines XL 70 RFS Blue R/C 4-Stroke Engine

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16 Review(s)

Availability: Out of stock

$169.99

No. 210857

Magnum Engines XL 70 RFS Blue R/C 4-Stroke Engine

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User's Guide (913.1 KB)This is the User's Guide for the Magnum XL .70RFS Engine

Customer Reviews

Items 1 to 10 of 16 total

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I'm Very Pleased With This Engine Review by Phalco
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I've had several Saito and OS four stroke engines over the years and this little engine is right up there with them. I've got mine installed sideways on a VQ Yak-52 and it pulls this 6lbs airplane around without any problem. The very first time I ran this engine it started up on the first flip with the electric starter. For break-in, I ran two 8oz tanks through it and just let it run at around 5,000 RPM (approximately 30 minutes of run time). On the third tank, with a wide open throttle, I started leaning out the engine but still running slightly rich. I'm running a Master Airscrew 12x8 three bladed prop, Omega 15% fuel and OS F plug. It runs this combination just under 10,000 RPM at full throttle on the ground. So far, I've never touched the low speed needle and it idles reliably at just around 3,000 RPM. Which may seem like a high idle, but it's really not. Very much the same idle characteristics as the Saito or OS. The machining and overall appearance of this motor is excellent. Considering that it's half the price of the competition, it's a bargain. (Posted on 6/6/14)
packs a punch Review by Gary
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been flying magnum for over 20 years. I have 2 of these and they are still as powerful as the day i bought them 3 years ago. Bought another today. (Posted on 3/4/14)
Incredible engine! Review by WayneDiZi
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Well, I have two .70's, one for my Great Planes 56" Mustang and one for my VQ Yak 52. These pull both exceptionally, and I'm ofen asked if I have a .91 in the Mustang! Ha, go figure, and the reply I get is always a surprise that its only a lil ole 70, very good on fuel might I add.

One comment was about the idle, which I too had problems, which were all mine as all I had to do was lean the idle mixture quite a bit from the factory setting and voila, perfect start and idle, litterally every single time.

Bravo Hobby People! Love all the Magnums, especially this one!! (Posted on 8/30/12)
Good pwer, bad idel Review by Fly Boy
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It runs good but the idle is no good. (Posted on 5/5/12)
for bob and those having glo plug issues... mine does not have these issues.... Review by David
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I am wondering if there is a different reason for the glo plug issues such as fuel type etc. Are ou running fuel and then dumping the leftover back into the gallon container or maybe too much nitro or oil? Just thoughts because this happens a lot when guys put the remaining tank fuel back into the main jug. The unused fuel has byproducts from the recirculating due to muffler pressurization of the fuel tanks. Along with the pressure comes the burned fuel back into the plane's fuel tank and over a few flights of putting the tank fuel back into your main jug will cause flight issues because of contamination's. This will also toast your coil in the plug over a very short amount of time.
Just a thought and maybe a solution?
Good luck with it. Other than this I just recommend trying a different fuel mfg or ratio of nitro. (Posted on 2/24/12)
Nice Engine... But glow plug issue as other reviewer Review by Chuck
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I have the engine installed in a Kyosho Oxalys 50 pattern plane. More than enough power at half-throttle and I love sound. I noticed that when I take the glow igniter away I too have a drop in RPM and I notice rough idle as well. This started occurring after a half-gallon of fuel had been run through the engine. I will change the plug and see what happens. Other than that this is a great engine. (Posted on 2/6/12)
ENGINE HEAD COVER WAS INSTALLED BACKWARDS FROM FACORTY Review by JIM
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Jim, you can return engine or we can send you new parts. If you want parts, please send pics so we can address the quality issues. Matt

WHEN I BOUGHT MY FIRST MAGNUM BLUE HEAD FOR MY ZLIN,MY FRIEND ALSO ASKED ME TO ORDER ONE FOR HIM.
JUST 2-3 DAYS AGO I ORDERED ANOTHER.
MY FRIEND SAID HE STILL HAD THE NEW ONE IN THE BOX AND ASKED IT I WANTED ANOTHER,SO I WENT TO LOOK AT IT AND NOTICED THE THERE 2 CRACKS IN THE FRONT OF THE VALVE COVER,IT WAS ON BACKWARDS FROM THE FACTORY,I ASSUME THEY ASSEMBLE THEM AND THEN TURN THEM OVER BEFORE THEY BOX THEM BECAUSE YOU CAN SEE THE METAL CONTACT,WHICH HIT THE COVER AND CRACKED IT .!
I AM A RETURNING CUSTOMER AND WILL TAKE PICTURES OF THE VALVE COVER AND RETURN IT IF YOU WISH.
THE ENGINE HAS NEVER BEEN RUN,THERE IS NO FUEL RESIDUE ON THE INSIDE OF THE COVER.
I WOULD LIKE A NEW VALVE COVER TO REPLACE THE ONE THAT WAS INSTALLED BACKWARDS.
AND THE ONE I PUT IN MY ZLIN RUNS FINE,NO COMPLAINTS,NICE ENGINES,JUST ONE OF THESE OVER SITES AT THE FACTORY./
I WOULD APPRECIATE YOUR REPLY
JIM WILKINSON
mrscale3557@yahoo.com
936 S.KIMBREL AVE
PANAMA CITY FL. 32404
850-874-1200
MERRY CHRISTMAS (Posted on 12/24/11)
Love this engine! Review by Daddyo57
Rating
I started out with this engine in a CAP 232 kit built airplane and the engine ran great but I wasnt wild about the airplane. I have now installed it in a Early models RC repro kit of a Goldberg Sr Falcon. This airplane weighs 6 3/4 ponds and the magnum 70 FS pulls it around with authority!!! I am running a Zinger 13X6 prop currently and am going to try a Zinger 12X8 next for extra ground clearance. I didnt measure RPM as I am still breaking the engine in. I intend to buy more Magnum 4 strokes in the near future, a 91 and a 1.80 and if they run as well as the 91 I will be a customer for life!!! BTW i have owned many 4 strokes through the years, OS and Saito mostly and this engine runs with the best of them at a much lower cost. (Posted on 9/23/11)
Going Through Glow Plugs Review by Bob AMA # 80941
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I have a Magnum 70 on my Hanger 9 Cub that seems to like a new glow plug every flying session. Symptom of when it's time to change plugs is the engine idle drops significantly when the glow ignitor is removed and the engine runs irratically at anything below half throttle. A new glow plug, using both the O.S. type F and the Thunderbolt, solves the problem. Performance is great with the new plug - for awhile. I'm spending as much on glow plugs as I am on fuel. Other than that, it's a great engine with good power and smooth transition. (Posted on 9/22/11)
Best Value on the market ! Review by Rick
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I own one of these and currently have it on a BH Models T-28 Trojan. The quality of the engine is excellent and it has performed flawlessly for over a year now. I also had it on a 1/4 scale J-3 Cub before I sold that plane and it was a perfect match there too. I have been very pleased with Magnum engines so far and I do plan to buy more. In my opinion, the Magnums are the best value available on the market today. Keep up the good work ! (Posted on 8/31/10)

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