A Brief History of the JLO Engine
JLO (also spelled ILO, Esperanto for Good Tool) is a German manufacturer founded in 1911 to service the railway industry.
They built light motorcycles from 1923 to 1925 using their own engines of 117cc, 132cc, 147cc and 170cc. Their engines proved very sound, and the demand for them led to them focusing on engine manufacture. By the 1930s they were exporting engines throughout Europe.
The company was sold to North American Rockwell Co. in 1968, and changed hands again some years later to another American firm.
These engines have been used by many marques including:
Swedish Maraton mopeds were fitted with JLO powereplants.
Many snowmobiles including Arctic Cat & Polaris used ILO engines, as did go-karts including the 1960 Trokart. Outboard manufacturers employing JLO included Warrenjet, and another marine application was the Waverunner.
German manufacturers which have used the JLO 175 engine: Bauer, Hecker, Hercules, Hoffmann, U T, Rabeneick, Rixe and Tornax.
Marques using JLO 250cc Twins:
Express- Typ 252 255
Hecker K 250 Z
Hercules Modell 318
Rixe 250 RS Senator
JLO Engine Models include:
F 60 H
MG 125 EF
MG 125 VF
MG 175 FS
MG 150 V
Hans Kambier has kindly supplied a JLO MG 125VF and MG 150V engine parts manual, available on request in PDF format. This engine was fitted to Bitri scooters.
Fri, 11 Aug 2017
pheading at hotmail.com
Binotto Moped, mid 1950's Engine No. 150-32585
Looking for a piston to suit 49 cc two stroke engine Bore size is 38.5 or 39 mm Centre height to gudgeon pin is 23 mm. Would you have something to suit?
It is a JLO engine. They don't make a Binotto moped any more. Here is a photo of the piston and some specifications. Hope this helps.
Tue Jul 11 2017
hkambier at zeelandnet.nl
remove fly wheel
JLO MG 150 V (1955)
Can you tell me how I can remove the fly wheel of the JLO MG 150 V engine
Mon Sep 12 2016
nzcastaway at hotmail.com
Jlo m200 v t55 200cc
looking for piston bore 62.5
Guinean pin 15mm
compheight 46.5 dome
Roy Kendling <roy.kendling at btinternet.com>
Flymo lawnmower with JLO engine 1990's
Can you please help me find a "blade bolt" for a JLO engine ref
JLO FLYMO Reference numbers ILO Motorwerk GMBH
TYPE RM100 Typ 001
Hbr 98 Motor No 100 00 09865
These reference numbers are all taken from the mower
Yours Most Sincerely Roy F Kendling
Tue Oct 06 2015
nikko.bess at hotmail.fr
Je voudrais savoir ou puis-je me procurer un piston pour un moteur JLO E250
Wed Aug 19 2015
chriswood1945 at btinternet.com
JLO Type SP35
Good morning, I have a motorised knapsack sprayer with the JLO engine SP35 which will not start - NO SPARK. The points are good & clean, any ideas please as I have no info on the engine. Many thanks Chris
Wed Nov 19 2014
bsfattire at yahoo.com
rockwell 6 m.b.h.
looking for info on this Eng. need a carb.
Mon Oct 20 2014
sam.masson at orange.fr
piston moteur JLO
tondeuse bunton JLO type 252 L
Je recherche un piston pour ma tondeuse bunton moteur rockwell (JLO). Voici les références du piston : type 252L, cylindré 267 cm3, diamètre du piston 69 mm.
Merci de vos réponses
Tue Oct 28 2014
jbolles41577 at yahoo.com
JLO Rockwell LR760
I need the tin shrouds for the top of the motor.
Mon May 26 2014
colinstuttard at yahoo.co.uk
JLO outboard engine
JLO L35L 074
Can you give me any information on this engine. I am looking for spare parts.
Mon Sep 23 2013
jlo rockwell JLO L2521
looking for parts for my old JLO L2521
Sun Sep 01 2013
I did find a brand new ILO LSU100LA engine in my basement. its with the orginal box and tools. The engien says 1955 on it so pretty old. I wold like to sell it. do you know of any forums that i can use to sell it and how much do you think i can get? newer used brand new from 1955
(Love that domain name! Ed.)
Sat Aug 24 2013
Looking for any and all information about the l-252 engine
Wed Aug 14 2013
engine rebuild kit
285 ccm jlo rockwell 2f2995-1
I am looking for a 258 ccm JLO Rockwell engine rebuild kit 2f2995-1...291-01-00
Indian River, MI
Thu Jul 18 2013
JLO (ILO) L152 Engine
I am looking for a JLO L152 Engine manual. Can you assist me in locating even a copy?
Mon Feb 25 2013
JLO RM 252
Wanted to buy TRANSISTOR for JLO RM252 motor I am in Australia can anyone help Thnks
Sat Jan 26 2013
I am searching for a usable piston for HAKO-WERKE 1965 engine. The diametre is 50mm and the height is 61mm and the axis is 12mm
Thu Jan 10 2013
JLO-Rockwell L99L engine
looking for replacement parts. especially ignition components i.e. coil
new york, usa
Posted in the German Forums
Fri Oct 12 2012
ILO L101L Typzeichen 121
Anybody having a working motor?
Wed Sep 26 2012
JLO sub seaengine
Does anybody have a float bowl to fit the Bing Carburettor on my Sub sea engine?
Mon Aug 13 2012
jlo FM 100K
jlo FM 100K
I need a complete & good running jlo FM 100 K kickstart or a good top end, jug with head. I can pay with Pay Pal & need fst shipping.
Sun Jun 10 2012
JLO L97 - Spark Plug Information
Hi, I'm looking for the correct modern day spark plug for a JLO L97 engine fitted to a Flymo GT2. Thanks for any help that you can give. Cheers. Ann
Wed Feb 15 2012
lr eng lr440
you can get new parts from cuynua engines usa still make them
Sun Jan 22 2012
JLO L-252 10.4 hp
I was wondering if you have any information about the L-252 JLO engine. It is for a 1965 Hus-ski 444 snowmobile. Thanks Jay.
Fri Mar 02 2012
JLO DL66O MOTOR ENGINE
AGRIA JLO DL66O
I want to buy piston and rings JLO DL66O engine motor. Please contact me!
Thu Dec 15 2011
2 stroke motor
JLO L252L HUBR 247 Motor #252105911
I am looking for a service and parts manual for this motor. Where can I find one.
Mon Dec 05 2011
JLO brillant L197
Hola tengo una motoazada brilliant con motor JLO L197 197 13263
Pero no tiene carburador y quisiera saber cual es ?
Tue Sep 06 2011
J -lo rm 252 gasket
J -lo Rm 252 engine 2520118235
Blew head gasket for mower. Do you know where I can get one. It's a metel type gasket and local gasket maker says a regular cut gasket will not work. Can you help?
St. Louis mo
There is information on gaskets in the components section
Tue Aug 16 2011
1975 Rockwell snowmobile points
Scorpion Whip 340
I've got a 1975 Scorpion Whip 340 with the original rockwell engine in it. is there any other engine or snowmobile that used the same points as this machine?
Sat Jul 23 2011
JLO L252L or 252-01
I am looking for a carburator kit, float and float pin. JLO engine is mounted to a Toro commercial walk behind lawn mower.
Tue May 10 2011
jlo type100, code 001,
Thu May 05 2011
JLO engine info
I was wondering if anyone has any info on the JLO R295 single cylinder engine. A parts book I found shows the cylinder # to be 295-07-807-00 but it has a 297-xx-xyz-xx (can't remember). Were there differences in these cylinders, maybe porting?
Pittsburg NH USA
Mon Apr 18 2011
Is it possible to get ventilator and magnet for Rockwell engine used in Holder H7
Mon Mar 28 2011
Gas shut off valve
JLO Rockwell L77L
Are there any Gas shut off valves out there available for this engine?
Tue Feb 01 2011
JLO MG125 (??)
can You help me to identify this Engine: number 397303, 1938 (year?), cylinder diam. 52mm, stroke 58mm (?), nose piston, 3-speed gearbox, probably from pre-war Victoria KR12 (?) bike (Frame nr: 222207).
Maybe You can find some information about this bike too?
Thanks in advance!
Sun Dec 19 2010
JLO LE 125 K
jlo LE 125 K
Can somebody help my to find a dealer in Hollend for piston & rings of a LE 125 K
Thanks Theo van Noort
JLO-Mahle-Piston.jpg posted 1012
Tue Nov 30 2010
JLO 35cc engine
JLO 35cc engine JLO 35cc
I am looking for a manual for the JLO 35cc engine, can any one please email me the specs sheet atleast
Tue Nov 02 2010
motor L 26 NÂ°62685
JLO WERK L26
recherche 2 segments de piston pour moteur L26
Mon Oct 25 2010
slupinski AT twcny.rr.com
297 jlo cylinder
1968 agway snowmobile sno squire
I am looking for a 5 stud single cylinder jug
Mon Oct 18 2010
JLO rockwell rockwell
Where can I find electronic igition conversion kits for JLO 295 and 440 engines?
Mon Oct 04 2010
SUD JLO WERK MUNCHEN 13 MOTOR L75
Wanted piston & rings,small end bush & pin
Wed Sep 01 2010
Süd JLO Werke L75
Searching for documentation about JLO L75 2-stroke engine
Wed Aug 11 2010
JLO Rockwell L35L
I got my L35L running, what's was your problem?
Thu May 06 2010
jlo no clue
I have a jlo single cyl 2 cycle engine . I am looking for a clutch for it . I have no clue on the model.It is a tapered shaft and it was used on a high pressure sprayer in the US military . <this is what I am being told> where do I go from here ??? pl ease help piont me in the right direction .. THANKS FOR YOUR TIME
Fri Apr 23 2010
Information JLO engine L35L
I'm looking for a manual or any technical information af a JLO L35L engine mounted to a Loewe (Libelle 80 bf) Waterpump
Sat Feb 13 2010
pablo at mweb.co.za
Looking for a Cylinder with piston + rings and a gasket set
Sun Jan 17 2010
elliedan at macdot com
2f-340 Engine Differences
Greetings! I hope that you can help me--I am working on a vintage snowmobile for a friend and am trying to determine the differences between JLO/Rockwell engines in these models to determine which parts are interchangeable.
Can you tell me what the different suffices in engine models mean? For instance, what is the difference between a JLO 2f-340-1 and a JLO 2f-340-6? I can find head and cylinder gaskets for the former, but cannot find any docmentation nor any parts referring to -6 engines, or any others for that matter.
Would the top end gaskets from one be interchangeable with another? Thanks very much!
Thu Jan 07 2010
havasupete1 at yahoodot com
JLO not sure typ L150 LE
I'm looking for any information on this motor
Thu Oct 15 2009
acarapacchi at microndot com
Jlo l60 motor infos
how can i get informations, service manual, of this kind of 2 stroke engine .
No pics are available
Tue Oct 06 2009
email at royaledgerdot com
Dear sir,my name is Brian Cook from Royaledger and Mower here in Clearwater Florida.I have a customer who has an old jlo engine on a Buton mower,model RM252,247cm,ser#2520116532.Please let me know if there is a ingition coil still available.thank you,Brian Cook
Tue Oct 06 2009
williamcharrison at yahoodot com
jlo rockwell 295 oil/gas ratio
Recommended gas/oil ratio.
Mon Oct 05 2009
jurban at rancetimber.co.za
Parts/service manual for JLO engine
JLO Rockwell Type 177R 73cm No.077150504
I am looking for a owners manual (electronic copy is fine) and a carburette for this engine.
Mon Jun 29 2009
Plutd at yahoodot com
Rockwell JLO 760-2
A friend of mine just bought an aircat airboat with this engine on it. He is wondering what fuel mixture this used. It is obviously quite old, but it seems to be in good shape. Also, are parts abailable?
South Dakota, USA
Sun May 17 2009
crkinc at bellsouth.net
JLO Rockwell 440-3
Where can I purchase a manual for this engine?
Tue Apr 21 2009
Je recherche un piston pour un moteur JLO de 247 CM3
Wed Apr 15 2009
flavinmario at yahoo.ie
JLO L3721 372CC ENG
CAN YOU TELL ME WHAT IS THE CORRECT PLUG FOR THIS ENGINE
Sun Mar 29 2009
firemangomer at aoldot com
need help with motor
rockwell 399 jlo
i got a tracker with a rockwell engine and cant start it i need a wiring diagrame or somthing
Mon Feb 16 2009
terrytuller at aoldot com
how much oil
jlo rockwell l-230 cc 2 stroke 1cyl
can't find how much oil to put in the bottom case
Mon Feb 02 2009
kerrison2 at hotmaildot com
ANY INFO ON THIE ENGINE FITTED TO RANSOM LAWN MOWER OTHER NUM ON THE PLATE ARE AS FOL 178
Thu Jan 29 2009
howied88 at hotmaildot com
L 372 L 372354418NR
LOOKING FOR OVERSIZED PISTON OR STANDARD RINGS AND HEAD GASKET I WOULD BE GREATLY APPRIENCITIVE IF YOU COULD HELP..
PLEASE E-MAIL BACK WIT PRICE AND AVAILABLITY PLEASE
Sun Jan 11 2009
amitalt at netvision.net.il
SUD-JLO WERK -SERVICE INFO
SUD0JLO WERK L60 SP 1962
looking for service manual ,spark plugs,gap of the platin.
model SP L60 year 1962
Try this page for books & manuals
Fri Dec 12 2008
hummel-bob at yahoodot com
Have a jlo motor in a early model waverunner,maybe a protocal,bad exhaust design.Do you have any info or leads i could use to find out more about this boat.Thank You!! Robert Hummel
Sun Dec 07 2008
bobjones616 at hotmaildot com
JLO L99 CLUTCH
I am looking for a replacement cluch or clutch shoes for a JLO L99 engine. Also any information regarding the manufacturer of the clutch. Any help would be appreciated.
Mon Dec 01 2008
zahuczky at freemail.hu
JLO 240 MGT from 1939
JLO ILO 250 MGT
Hello! I am searching for an ILO 250 MGT single cylinder, 2 stroke engine, with Graetzin K22S or Amal M75/415 carb, if possible. Thanks!
Sun Oct 05 2008
montutu61 at gmaildot com
moteur 175cc JLO
JLO MG 175cc 1952
pouirriez-vous me faire savoir si il est encore possible dse se fournir des piÃ¨ces pour ce moteur.Si oui pourriez-vous me faire parvenie par mail un catalogue avec les prix.
merci de votre rÃ©ponse.
Thu Oct 02 2008
thejoenolan at aoldot com
JLO - wanted
jlo / ILO L101
Hello, I would like to obtain some JLO/ILO L101 engines and spares for a historic kart restoration project. Many thanks
Mon Sep 08 2008
joutlaw6 at netzero.net
two cycle engine
rockwell 760 332
need parts for typ lr760/2 744ccm engine fly wheel coils points and starter
Sat Jul 26 2008
buckaroos-daddy at yahoodot com
I have a rockwell JLO motor single cylinder, and I was wondering what sparkplug it takes.
Wed Apr 09 2008
jhoward825 at btinternetdot com
I have a JLO 89cc engine in a Warrenjet outboard. Are there any spares or information available in the UK please.
Thu Mar 27 2008
pasi.sten at volvodot com
JLO ? ?
Found an engine in the garage. Don't know the brand and type. Could You give a hint. Pictures (4 pcs) You find in:
Thank You for Your help.
Regards mr. P. Sten / Finland
Finland / Tampere
Mon Mar 17 2008
nemanja86bg at hotmaildot com
JLO Minimo 30
JLO Minimo 30
Sehr geehrte Damen und Heeren
Ich besitze Jlo Minimo 30, Baujahr: 1969
Typ: MM 540
Ale Teile sind original unde es is fahrbereit. Ich wolte fragen ob ich eventuel einen neueres model bekomen könnte weil er über 35 Jahre alt ist?
Gerne erwarte ich Ihre Geschetzte Antwort.
Mit den frunlichsten Grüssen Djordjevic Nebojsa
Tue Mar 11 2008
Marcello.Pegoretti at elettropiemme.it
Servono cilindro, pistone e una valvola applicata al cilindro che ferma il motore. Il montore aziona un argano per tirare cavi. Grazie per quanto potrete rispondere.
Sat Feb 16 2008
littlebit-movingon-faith at yahoodot com
rockwell jlo l380l
would like to know the history of this engine & are there any available parts?
Sun Feb 03 2008
d-janisch at mchsidot com
1969/70 L340JLO single cylinder L340JLO
Can some one tell me what spark plug to use for a 1969/70 L340JLO single cylinder engine. It had an old Champion K8 that fit the threads but would not go down far enough to seat on the top of the head. Same for a new champion D9. HELP!
Sat Jan 19 2008
tomrof at kmts.ca
I am looking for parts and info on this engine. I have the main block with recoil. Looking for muffler and manuel
Mon Jan 14 2008
vincent.farrugia at maltairportdot com
To Buy Parts
Rockwell JLO L197 10 Special Motor Hoe
Dear sir, My motor hoe stops after 20minutes and will not start again. I am suspecting that the coil or the capacitor have a problem. If you can contact me I will explain more by e-mail Thanks
Wed Jan 09 2008
tclark at transeogvsdot com
Yard Man Yard Cub
I am in need of a few parts for this Yard Man Snowmobile. I need a carburator rebuild kit, A points set, and a set of piston rings. also I need a recoil starter and cover. If you may be able to help Please e-mail me for more info. Thank you.
OH, Arcanum, USA
Mon Jan 07 2008
warrenja1 at yahoodot com
Rockwell jlo l295l
I have bought a hoverover hovercraft which has 3 rockwell engines. The main one is a JLO L295L which is the one I have questions about. The engine was in pieces when i got it. I have bought a new piston and conrod but the gudgeon pin is too small for the conrod. Is there meant to be a roller bearing on the small end of the conrod??
Also, what petrol mix are these engines supposed to run on?
Tue Dec 25 2007
srmhome at ihug.co.nz
I have been gifted a warrenjet 25 outboard powered by a JLO motor. The plate on the motor has the following information
Could you tell me what oil mix this engine requires and what spark plug is required.
Auckland, New Zealand
Thu Dec 20 2007
jes2usa at yahoodot com
TYP L197L 097 198CM3 ser197 04 39103
Does anyone know if parts may be had? Just what the heck is it.
Sat Dec 01 2007
davelow723 at aoldot com
Im having trouble seperating the motor casing. All the bolts are out that hold the casing togather. Do I need a special tool to seperate the casing.
Tue Nov 27 2007
ateliermeclamontagne at hotmaildot com
nous avons un moteur 2 cylindre rockwell 338 ayant comme numero de serie 339-06-01533 zeichem 412 typ 2f340-06 et nous voudrions savoir dans quelle sorte de motoneige ce moteur la viens car on a seulement le moteur pour pouvoir commander des pieces si besoin mereci
Translation: we have a two-cylinder motor Rockwell 338 having like job number 339-06-01533 zeichem 412 typ 2f340-06 and we would like to know in which kind of motoneige this engine come it because one has only the engine to be able to order parts if need be.
Tue Nov 27 2007
vittorio.mauri4 at tin.it
SOMEONE KNOW THAT ENGINE? THANKS IN ADVANCE VITTORIO
Mon Nov 26 2007
dewie at iserv.net
399 JLO (Rockwell)
I have a 1971 Artic Cat snowmobile with the 399 Rockwell JLO engine in it. Can You tell Me where I can get a Repair Manual for the motor? Thanks, Doug
Thu Nov 01 2007
esquelrod at speedy.com.ar
typ DL 660
necesitaria informacion tecnica sobre este motor ubicado en un motocultivador AGria, necesito datos del piston por haber sufrido una averia importante y ver laposibilidad de fabricar uno
Les adjunto imagenes del motocultivador Agria werkel con motor JLO
Sat Oct 27 2007
laut-biru05 at yahoodot com
i wanna know what motorcycle i havw
the mechine writen
i have a machine mark os JLO but i don't know what motorcycles is? in the block mechine written Jlowerke g.m.b.h Penninberg. type 125 v. 411. i wanna know what the original motor is? and please send the picture beacaue i will built it. thank. beni
Sat Oct 20 2007
david.benyon at lineone.net
Bad running/won't run
JLO Outboard Motor 76cc (Amal carb).
This motor is giving a lot of trouble. I cleaned the carb and added new fuel. There is a good spark and the motor did run once for about 30 seconds then failed. Cleaned the carb again but still no go. I think I will have to dismantle it to check piston rings and crankcase seals. Can you advise what the compression pressure should be? Best regards from Dave.
Wed Sep 26 2007
richnliz at fsmail.net
50cc 2 stroke
hi do you know where i can find a repair manual for jlo in english
Sun May 27 2007
anc at yahoodot com
JLO Rockwell G.m.b.h. Pinneberg / Hamburg
Typ L 300 L Hubr 297 Mot Nr 297 46172
Can you tell me engine size and horsehopower? I believe it was a challenger 300 snowmobile that it was on. Engine runs good hard starting believe it needs a carb kit. Where can I buy parts? Bought engine for Go kart. Thank you
Sat Apr 28 2007
Marmarakount at yahoodot com
jlo snd 746606
I dont speak german . Please help me I have an old 200 cc battery operated ground digging machine and I am looking for ignite parts or the whole engine it is 2 cycle 4 speed no reverse could some one e mail me and let me know where I could find them I am in greece thank you
Thu Feb 08 2007
Tim.mcc at droitwich.demon.co.uk
JLO M 200
I have a 200cc JLO engine, given to me in the early 70's. No one in the UK has ever heard of JLO. Does anyone know what this engine came out of? as I would love to do somthing with it.
(unfortunately no picture at the moment)
Tue Mar 06 2007
I have written before to let you all know that I have a 200 cc JLO engine and have tried to find any information about it for many years unfortunately I do not speak German