MVVS proving impossible to start!
 

Ok, so I have a brand new 26. Set it up, recharged all batteries and tried to start the engine.
Nothing, not a hint, not a splutter. Checked spark plug gaps, checked all connectors, checked voltage on battery, fresh fuel. Nothing.
An old mate once said, an engine only needs two things, fuel and a spark. Confident its getting fuel, but not sure on the spark.
How can I check the ignition to see if a spark is being generated?
I'd appreciate any idea's.

Cheers.

RE: MVVS proving impossible to start!
 

Can you remove the plug, hook it up to the igniton system and then turn the engine over so that the spark is energised? If so, do so and check visually, whether you are getting a spark.

RE: MVVS proving impossible to start!
 

thanks Woody, do I need to hold the plug against the motor case or anything?

RE: MVVS proving impossible to start!
 

Euclid,


Please check the following:

Does your Walbro carburettor actually pump fuel from the tank (some Walbro carburettors came with stuck diaphragm valves, that must be cleaned to work right)?

Are you following the instructions as to exactly how to start the engine?

Is your engine's ignition sensor mounted properly?

Is all the HT and LT wiring connected properly?

After 20 flips, or so, that don't produce a start, the ignition stops working. It needs to be turned off and back on.

Pé can probably add a few things you can check.

RE: MVVS proving impossible to start!
 

Yes I can.
It is often difficult to get fuel into the Walbro for the first time, or after the carb has been run dry for storage. I have a trick for this.
using a squeeze bottle with fuel, and a piece of fuel line, I place the end of the fuel line on the small hole of the regulator (sheet metal carb cover hole) and blow on the tube to get pressure on the membrane. At the same time, I squeeze the fuel bottle. This will prime the carb, and inject some fuel into the engine. The idle prop flipping now sounds hissing wet.

turn on the ignition switch (you have one do you? It is mandatory), and flip the prop. It may start on a light flip, so be careful at all times with ignition on. Don't ask why I tell this [&:]

Once the carb is primed, normal starting procedure looks like this:
1) With ignition on, and choke on, flip the prop until the engine starts. It will die immediately.
2) open the choke valve, and set throttle to high idle.
3) close and open the ignition switch to be sure of an ignition reset
4) flip the prop until the engine starts. (two or three flips should do with well adjusted Walbro)

For carb adjustment, look at tis link:
[link]http://www.mvvs.nl/manuals/wbmanual1.pdf[/link]

RE: MVVS proving impossible to start!
 

thanks for the assistance chaps. Much appreciated. Certainly fuel is being drawn to the carb. I've covered the intake with my thumb ensuring closure and flipped the prop over, (Without the ignition on!!) and scored a wet thumb. So fuel is being drawn.
But on pulling the spark plug, it appears dry. So I'm assuming nothing is going through to the engine itself.
With regard to DarZeelon,
I believe the sensor is mounted correctly, I dont believe it can be mounted any other way. Although the sensor doesnt cover the aluminium coloured dot on the drive washer. Should it?
All other wiring is correct.

RE: MVVS proving impossible to start!
 

Can you post a picture of the sensor and magnet relation? The sensor should completely cover the magnet when they are at the same position.
Do you get a spark?
Is it MVVS 26 or Evolution 26?

RE: MVVS proving impossible to start!
 

Thanks Pe. The engine is a new MVVS26.
This email was going to include a photo of the sensor and magnet, but its funny, I was looking at the photo and thinking that the sensor must cover the magnet when, (and I'm sure you must have heard the CLICK in Holland when it occured!!!) it occcured to me that all I needed to do was turn the drive washer around and then the sensor would cover the magnet! D'Oh
Sure enough, the engine fired right up!

Thanks for your help Pe.

RE: MVVS proving impossible to start!
 

Yeah, I heard that clicking sound!

RE: MVVS proving impossible to start!
 

Glad I found this thread, I'm having trouble getting fuel to pick up on my MVVS 1.6 so I'll try priming the membrane and see if that helps. I did find out though why the warning was given to watch how easily the engine may fire. I did squirt some fuel into the carb and brought the prop around with the switch on. I'm now sporting a lovely black finger nail on my third finger that throbs every time I put my hand down. This thing sure fired a lot quicker than my magneto engines do. OOWWW.

Three fingered Harry

RE: MVVS proving impossible to start!
 

Hey, Harry!

What happened to your other two fingers <<GGGG>>?
...Or is it the other SEVEN?

...You did sign 'Three fingered Harry', didn't you?