- Weak Spark Gilera 50 Scooter: Troubleshooting Gilera Typhon Starting Issue & Coil Module

Question

I have a problem with the Gilera Typhon scooter. The scooter does not start and the problem is a weak spark when turning the starter.
The longer the spark spins the smaller and smaller it is until it disappears completely. After a short break it is still the same.
I am asking for some specific advice and I have a question whether the coil module may be responsible for such symptoms?

DriverMSG · Answer

There you have 3 wires on the coil. Check for a short to ground with green ignition ON.
Check that the white shows the generator voltage while cranking the engine.
Red goes to the pulser.
If there is voltage on white and no short to ground on green, the ignition coil is dying.

Tom2602 · Answer

In the morning I will check it and write what the matter looks like.
And do you know what voltage should be on the green cable that goes from the ignition coil to the module?
Some people write that it should be 40-50V and on the Internet in one video the guest gave the value of 80-100V.
Which values are correct?

Added after 3 [minutes]:

If you write that the coil "dies" it is about the one in the magneto?

Added after 2 [hours] 17 [minutes]:

The cables are checked with a meter and there is no short to ground on the green cable, it shows 38-43V when turning the starter.
It has a white cable while shooting, it also shows some value. If it stops spinning it drops to zero.
So what's my problem?
In the coil at the magneto or the module coil?

BANANvanDYK · Answer

There should be no voltage on the white because it is the ignition ground connection. Check if the mass of the engine is properly attached (mass of the starter) - from the starter mounting bolt to the voltage regulator mounting bolt on the side of the frame.
Check the resistance of the CDI supply coil on the green wire when the spark is strong and the spark is lost.

DriverMSG · Answer

Sorry for the mistake (night fatigue came out), the voltage should be green with the ignition on. The value from - to varies depending on many factors and should not exceed 350V AC.

Check the resistance on the pulser (red wire to ground) there should be about 130?.

What model of CDI ignition coil (high voltage cable to spark plug coil) do you have?

Tom2602 · Answer

The voltage on the pulser within 125-130 ohms.
And I have the module with an additional mass cable.

Added after 1 [hours] 6 [minutes]:

When turning the starter, the scooter starts to catch and fire during a longer spin, but after about a minute it goes out.
Then again the firing problem ...
Wet candle ...
What could be the reason for not starting the scooter?
A week ago I did piaggio typhona, it fired after touching the starter ...
I am asking for advice ...

DriverMSG · Answer

Correct resistance. It doesn't matter in this case. I support my first suspicions. Faulty ignition coil - CDI module.

Tom2602 · Answer

Tomorrow I am ordering the module and it will work.
I will let you know if it helped.

Added after 8 [hours] 9 [minutes]:

Today I was in the garage and the scooter started with a problem but it fired.
I noticed that the suction is very hot and the scooter went out after about a minute and refused to start.
After disconnecting the choke and cooling the engine, the scooter fired and walked for about half an hour.
After plugging in the plug, it came normally for half a minute and it started to muddy and went out.
Could the automatic choke be a problem?

BANANvanDYK · Answer

Carburetor cleaned? Since it only works on the suction, the main jet is clogged. Possibly idle jet and idle air adjustment. Original air filter, undamaged?

Tom2602 · Answer

The carburetor was cleaned twice but the nozzles were not clogged.
When you manage to fire it, it runs at low speed, only the screw from the mixture is unscrewed only half a turn.
Even when it goes out, the candle is flooded.
I have already ordered new shaft seals because it seems to me that I am licking left air.
And can it be the fault that someone previously installed a non-vacuum fuel tap and too much fuel is poured from it and overflowing through the nozzles?
I know that the needle valve should close the fuel, but the fuel does not fly from the vacuum tap as much as it does, because it is like pouring from a good hose.

BANANvanDYK · Answer

The exhaust is not clogged? Series or tuning exhaust?
Vacuum port on the carburetor clogged after replacing the vacuum tap with a hand tap?

These are general regulatory data for the HiPer2 air-cooled carburettors, slight variations may occur between the scooter models. For this carburetor to work properly, it must have a blockage on the inlet port (yellow plate with holes).

Tom2602 · Answer

The exhaust is standard and the vacuum connection is blocked. What's with the lock on the spigot?

BANANvanDYK · Answer

This must be in place, otherwise the carburetor gets too much air and the engine suffocates.

Tom2602 · Answer

Can the reason for flooding be the lack of a washer under the main nozzle?
Today I noticed that the nozzle is not going to the end. That is, when I tighten it fully, the nozzle head does not touch the edge of the carburetor body.
Can it suck fuel there?

BANANvanDYK · Answer

No. The nozzle seals against the sprayer at the butt joint, therefore it may stick out from the body.

- Weak Spark Gilera 50 Scooter: Troubleshooting Gilera Typhon Starting Issue & Coil Module

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Topic summary