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

Availability: Out of stock

$169.99

No. 210857

Quick Overview

This is a Magnum XL .70RFS R/C 4-Stroke Engine. The XL .70RFS is a single cylinder, four-stroke engine incorporating an aluminum piston, iron ring and steel sleeve for long life and high power output. A dual-needle valve carburetor for precise fuel/airflow metering is standard.

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

Details

Magnum XL .70RFS

R/C 4-Stroke Engine

This is a Magnum XL .70RFS R/C 4-Stroke Engine. The XL .70RFS is a single cylinder, four-stroke engine incorporating an aluminum piston, iron ring and steel sleeve for long life and high power output. A dual-needle valve carburetor for precise fuel/airflow metering is standard. The engine features a dual-ball bearing-supported crankshaft and camshaft, dual bushing-supported connecting rod, and a high-flow muffler for more power and reduced noise. Your Magnum XL RFS series engine was designed by expert engineers and built by master craftsmen using only the highest quality materials and CNC machinery. These qualities provide the long life and dependability you have come to expect from an engine of this caliber.

Magnum has been bringing you high performance engines at an affordable price for more than 20 years! During that time the line has grown and expanded to offer a full line of 4-stroke and 2-stroke engines. And, all are made from the finest materials on the latest machinery. Plus, you get the added security of a full one-year warranty that protects you from any manufacturing defects and or premature wear (crash damage not covered). For reliability, high quality, and performance the choice is MAGNUM!

Features:

• Ringed Piston Design for Long Life and High Power

• Aluminum Piston, Iron Ring and Steel Sleeve

• Rear-Updraft, Dual Needle Carburetor

• Crankcase Gas Recirculating System - Improved Lubrication and Cleaner Model!

• Choke Valve and Lever

• High-Flow Quiet Muffler

• Dual Ball Bearing-Supported Crankshaft and Camshaft

• Dual Bushing-Supported Connecting Rod

• Blue Rocker Valve Cover

• Safety Propeller Nut

Specifications:

• Displacement: 11.5cc

• Bore: 25.8mm

• Stroke: 22mm

• Practical RPM: 1,800 to 11,000

• Weight with Muffler: 21.2oz

• Muffler Thread Size: M11 x 0.75mm

• Crankshaft Thread Size: 5/16 - 24

• Recommend Propeller Size: 13 x 6 (Break-In)

*Requires glow plug, fuel, propeller and support equipment. We recommend using 15% ~ 20% Nitro Methane Fuel with 16% ~ 18% Castor Oil/Synthetic Oil Blend Lubricant. We recommend using a hot heat-range glow plug designed for 4-stroke engines, such as Thunderbolt HP, O.S. Type F or Fox Miracle Plug. Propeller size will vary based on many factors. We recommend a 13 x 6 propeller for break-in.

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Additional Information

SKU 210857
Manufacturer Magnum Engines
Mfr Part Number XL70RFS-BL
Video No

Customer Reviews

I'm Very Pleased With This Engine Review by Phalco
Rating
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
Rating
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
Rating
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
Rating
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
Rating
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
Rating
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
Rating
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
Rating
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
Rating
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)
Tune that 4S Review by Ken
Rating
Bought the XL 70 RFS about two years ago. My first 4S. Had it in an old texan and it pulled it around okay. Recently installed in a hi performance 46 size bipe but it had set for awhile and just didn´t seem to have enough power. Worked with Todd at Global´s excellent tech support and found a couple of things. First read the manual and adjust the valves. There´s an extra 1000+ RPM to be found when you get them right! Engines been a real power house spinning an 11-7 3 blade at 11200 using 15% fuel. Idle is fantastic and transition is excellent. Running inverted in a full cowl doesn´t overheat and a little loctite around the muffler sealed up the little bit of oil blow by messing up the inside of the cowl. Keep the "O" rings fresh and all the bolts tight. Bottom line, like every other mass produced product a little bit of attention and fine tuning has turned out a real Gem!!
(Posted on 8/30/10)
Great running engine Review by Jim
Rating
I have had my Magnum 70 for over a year now and it has had only one problem. I was on my 5th tank of fuel when one of the values stock open losing power. I was able to get my Spacewalker safely landed. I called Hobby People where I had bought it and they had me send it back in for repair. It did not cost me anything except postage. Hobby People had the engine repaired and it has more powerful than before. It has been running for almost 10 months now without any trouble. Great power and a perfect idle. I only gave the engine 4 stars becasue of the miss hap, but I will buy another Magnum. Infact I have a great running Magnum 91FS in a 1/5 scale Fokker DR-1 (Posted on 8/30/10)
Magnum XL.70-RFS engine review Review by rothe
Rating
I purchased a Magnum XL.70 about two weeks ago, and it is currently mounted in a Hangar-9 twist .40. The engine works great! I put just over a half-gallon of Byrons 10% fuel through it on the test stand, with no problems at all. In the last week I have put another gallon and a half through it. The engine works great for the twist´s light airframe. giving it unlimited vertical performance. (Posted on 8/30/10)
Ultimate Power Review by Bob
Rating
I would like to say some good things about these engine´s. Since I started flying approximately 10 years ago and my fourth RC aircraft happen to be a Global Ultimate Biplane ( Nine years old to date and still flying ) with a Magnum .52 RFS, then eight years later I gave the Ultimate away to a friend, it returned again to me a year later.
The Magnum .52 ( now nine years old and still running great with no repairs and no adjustments ever needed )is now being used in my 52" wing span Decathlon to this day, so I had to find another engine, so I purchased the Magnum .60 RFS last year to fill its needs.
The Magnum .60 engine preforms great, but the Ole Biplane is still a little under powered. So first of this year a fellow flyer gave me his Global Ultimate he purchased last year luckily, since they have been discontinued now several years.
So now I have two Global Ultimates and I purchased the Magnum .70 RFS to fit into the Second Bipe. After a few tanks of fuel and few tweaks to the carb, she is flying the Ultimate proud, lots of power for the size of the aircraft. The Magnum .70 RFS should have been the first engine in this airplane along time ago, the performance of this aircraft now is overwhelming, 3D flying is at hand.
Power, response, and trust has been establish again in the Magnum line of engines. But to give the others their due, they may have the power curve over Magnum engines, engine size to engine size, but as far as I have seen, that is about all. (Posted on 8/30/10)
Crow is best served as a left over Review by Dave
Rating
Wow. What can I say?

My first "review" of this product was 3 nights ago. At that time, I had spent probably more than an hour and a half in "run time" attempting to get my Magnum 70 engine to perform. It didn´t want to turn any more than 9,000 rpms with a 12X6 prop, and the idle was no lower than about 3,400.
The morning after I posted the first "review", I had an email waiting on me from Global/Magnum support, as HobbyPeople had forwarded a copy of my "review" to them. Needless to say, I was quite shocked, and quite frankly I didn´t think that HobbyPeople would even publish my "review" of the Magnum 70. I was very surprised to find they did. That in itself speaks VOLUMES for HobbyPeople; I can´t remember the last time I read a negative review on either a retailers website much less a trade magazine. Can you?
Global/Magnum support was extremely concerned with my experience with their product, and wanted a chance to "make things right" as a result. We discussed the symptoms and I even sent them some photos of what was happening with this particular engine. Without a doubt, Global/Magnum wanted 2 issues to be resolved; 1) getting a replacement engine in my hands and 2) getting the "problem" engine in their hands as a matter of product developement.
I was given the opportunity to have a UPS "call tag" sent to me, and all I needed to do was box the engine up and send it to them. Having bought the engine at the local hobby shop, and knowing when I bought it that the owner of the shop had purchased more than one, I proposed a "reasonable" resolution of me simply returning my engine to the hobby shop for an exchange of another one, and the hobby shop could send the "problem" engine back to Magnum/Global.
This morning I got a call from the local hobby shop telling me they were holding a Magnum 70 engine for me, and to bring the "problem" engine in for a swap. Global/Magnum had contacted them and worked out the details, and as of this afternoon I have a Magnum 70 installed on my Sig Somethin´ Extra that runs MUCH much better than the first one. I think this one is going to perform up to spec.
So what is the moral of the story? I guess in just about any industry, their can be a "quality control" slip up that can happen. How often it happens will make or break a product. The fact that Global/Magnum was very surprised to see my initial "review" which lead to a more than timely resolution suggests to me that A) this doesn´t happen often, and B) if and when it does, they are on top of things with their support of the product.
Ok, last bite of crow going down. That being said, I would definitely purchase another Magnum engine in the future, without hesitation.

Sincerely,
Dave, AMA 55707 (Posted on 8/30/10)
Magnum 70 operation Review by David
Rating
I own several Magnum 70s, they all run perfectly, little or no maintenance. They have given me many hours of pleasure. (Posted on 8/30/10)

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