bluetomcat74

Hi ALl

I've recently picked up a second hand 100cc Edge. It has 8 Hitec HS7954SH servos and a Powerbox system. It has never flown before as the wings still require finishing.
It also has a twin JC engine with a twin can exhaust system. Is there any way to identify what engine it is?
The owner couldn't remember what cc it was. I am very interested to know.

Many thanks
Bluetomcat74

kmeyers

Does it look like this?

DISPLAY : ALL CATEGORIES 53 POWER SYSTEMS 772 GAS/GLOW ENGINES 174 GAS ENGINES 11

JC120 EVO Gas engine w/CD-Ignition 120cc/12.5hp @ 8,000rpm

0 REVIEWSPRICE:
$465.40
Discontinued Product

Please continue searching for a similar product.SKU:
375000004
SHARE :

want FREE shipping? Click here to find out more!
Report IssueNot Cheapest?
Share this product & Earn 2400 points ($23.27) [ ? ]

• PRODUCT DESCRIPTION
• PRODUCT SPECIFICATIONS
• VIDEOS
• DISCUSS 0
• REVIEWS
• MANUALS/FILES

The JC120 twin cylinder gas engine is a powerful, nicely made excellent quality piece of kit.It is supplied with a whole host of accessories including an electronic ignition system, mufflers, mounting template and a warranty card.

Features:
• Lightweight but strongly made
• Compact design
• High quality machining
• Powerful, 12.5HP @ 8,000RPM
• DC-CDI electronic ignition with computer controlled auto advance
• Walbro carburetor with diaphragm and manual choke

Specs:
Engine Type: Twin cylinder 2 stroke air cooled
Displacement: 120cc
Bore/Stroke: 45x38mm (each cylinder)
Max Power: 12.5HP @ 8,000RPM
RPM: 1,100~8,000RPM
Ignition: DC-CDI electronic ignition with computer controlled auto advance (4.8~6V)
Spark Plugs: CM6 x 2
Carburetor: Walbro with diaphragm and manual choke
Fuel: Gas/oil mix (25:1 for break in, 40:1 for general use)
Weight: 3000g including ignition and mufflers

Dimensions:
Length from Mount to Propeller Boss: 165mm
Height from Crankshaft Center line to Top of Carb: 120mm
Width (Spark Plug to Spark Plug): 281mm
Mounting Holes: 70x80mm

bluetomcat74

No unfortunately it doesn't. I think its the older one. Ill try and take some pictures over the weekend. It has a large black air intake/filter over the underside of the carb.
I think it maybe an original or one of the first MK's to be produced.
It is more square/boxier than the curved cylinder head cooling fins in the pictures.

kmeyers

Bore/Stroke: 45x38mm (each cylinder)

With the plug removed you should be able to measure the stroke.

bluetomcat74

how do I measure the stroke? I don't have any specialised equipment.

kmeyers

1. remove the spark plugs (so the engine turns freely)
2. insert a dowel (or something) into the cylinder until it touches the top of the piston
3. rotate the engine and mark on the stick the highest and lowest
4. measure the distance between the two marks
easy peasy
that is the stroke

bluetomcat74

Awesome. Thank you very much. I will try that tomorrow and let you know how I get on.
I have photos to put on here too but can't upload them.

kmeyers

Are you a robot or a troll?
I think the rules require a certain number of posts, like ten. So, do a quick yes and ok to boost your count.
then go advanced and try a pic.

bluetomcat74

I am not a robot

kmeyers

You are still one post short of pic ability.
Another way is the old bump (which is a blank post).
You have to reach ten.

bluetomcat74

haha no worries ill keep going!!!

bluetomcat74

Let's see if I can post some Pics then....