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Date: Fri, 19 May 2000 10:56:18
Subject: Re: Tomos A3
From: Hans Hartman
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Hello ...,
At 04:21 17-5-00 -0700, you wrote:

>I would like to know if anyone out there could tell
>me how to repair the problem with my carb. It is on
>a 1978 Tomos A3 sports. The prolem I'am having is it
>gets to much gas. The type of carb I have on it is
>not the kind that is found on a Reed Valve engine. I
>think it is the kind that sucks its gas in the engine
>threw a hole in the piston.

The hole in some pistons is with reed-valve engines only. Your Tomos sucks
it's mixture like mosst other old 2-strokes through the inletports
(Schnürle patent reversed flow)

Your floater is either leaky or the point is damaged. If you replace the
floater because it's damaged, you'll probably have to replace the top of
the floatchamber too.
If these parts are not available, you could dip the point in some grinding
paste (the stuff mechanics use the grind in valves) , and grind it in it's
seat. Maybe it's just dirty, and cleaning will do the job too..

>All I can find in the
>carb is a plastic float and a brass idling jet. The
>carb has a number on the side of it A83 if that helps
>telling you what kind of carb it is.

Yes, it's an Encarwi carburettor. A83 is the type. The main jet is fixed.
Choke operated through a little thingy on the twist grip, which allows the
throttle valve further down. Idling must be adjusted at the cable end.

> I would also like to have someone tell me what the
>3 wires comming out of the engine do. There is 2 blue
>ones and a yellow I know one blue one goes to the coil
>but I don't know where the other blue goes and the
>yellow one goes.

The two blue ones; you already found out, one goes to the HT-coil, the
other goes to the switch to turn the engine off, by shorting that wire to
ground.
Yellow comes from your lighting coil and should be connected to lighting
switch.

>If anyone out there has a repair
>manul on the A3 engine that they would like to sell I
>would sure be interested in buying it.

I've got one, it's pretty basic though. It's in Dutch, so I guess it won't
do you much good.
Maybe I'll scan the pictures in, translate it to english, and dump the
whole thing in my I-drive.

Cheers,
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