King Engines

Need technical help on some problem? Let us know and we will see what we can do
Nick Reeves 3055
Posts: 146
Joined: December 4th, 2008, 5:42 pm
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King Engines

Postby Nick Reeves 3055 » April 21st, 2021, 11:48 am

All,
I have recently picked up a very nice model that has a King petrol lump in the front. Im not sure what size it is but looks to be about 50cc ish. The issue i have though is it has a 'Horst Becker' ignition and i cant find any info on what voltage they run on. It has a servo lead coming out of it with no plug to give any clues.
Does anyone have experience of these engines?
Cheers
Nick
Adreneline is a Natural substance, Enjoy it when you can!
Too many planks to count, & two helis all guided by Futaba

IAN TURNEY-WHITE
Posts: 22
Joined: December 10th, 2008, 3:02 pm
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Re: King Engines

Postby IAN TURNEY-WHITE » April 21st, 2021, 3:24 pm

The Becker ignition units are designed to work on 4 cell nicads or nimb batteries or via a regulator set to no more than 5.5 volts
Two types , early units had advance/retard via the sensing magnet being on a spring loaded arm inside the hollow rear part of the prop hub , advance operates thru centrifugal force .
The later types have electronic advance and retard and the magnet is fixed in the outside rim of the prop hub
The bracket that holds the sensor above the magnet has slotted screw holes and small adjustments can be made .
You need a gap between the magnet and sensor approx 0.6 to 0.8 mm
The timing is correct when slowly turning over the motor , the spark plug " sparks" at top dead centre , the magnet just starting to
go under the sensor. Do not energise the ignition unit without spark plugs being fitted
Care needs to be taken with regard to the plug caps ,these are best removed if required , when the caps and plug caps are not hot/ cooled down ,and care needs to be taken not to pull on the ht lead .
Looking inside the plug cap you should see a small brass "pip " which provides electrical contact to the aluminium threaded sleeve on the end of the spark plug
Early plug cap internals ( black ) could sometimes melt and removal of the plug cap could then be a problem , maybe arranging for air cooling to the caps would be useful
Later plug cap internals seem to be made from a more heat resistant ( white ) material
Hope the above helps , regards Ian Turney-White

Nick Reeves 3055
Posts: 146
Joined: December 4th, 2008, 5:42 pm
Contact:

Re: King Engines

Postby Nick Reeves 3055 » April 21st, 2021, 9:27 pm

Ian,
many thanks for that. i shall give it a 4 cell NiMh pack and see if i get any sort of spark. do you know if spares are still available anywhere?
cheers
Nick
Adreneline is a Natural substance, Enjoy it when you can!
Too many planks to count, & two helis all guided by Futaba

IAN TURNEY-WHITE
Posts: 22
Joined: December 10th, 2008, 3:02 pm
Contact:

Re: King Engines

Postby IAN TURNEY-WHITE » April 23rd, 2021, 10:12 am

Nick , I believe spares are available from
HORST BECKER IM , MARKWALDCHEN 1 , D-64839 MUNSTER 2 ,GERMANY teiephone 0049 6071 35565
regards Ian Turney-White


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