Ignition module won't shut off

by Eric Goethel in 912 / 914 Technical Questions 11 years ago

Page 3 of 5

Start
Prev
1
2
3
4
5
Next
End

Re: Ignition module won't shut off

by Alan Arnold » 7 years ago

Alan Arnold

20 188 145

The water/steam treatment has the advantage of not adding hydrocarbons to the area that you wish to remove the burnt on hydrocarbons from. The question is, is it too harsh for the Rotax.

Alan

Report
Re: Ignition module won't shut off

by Bill Hertzel » 7 years ago

Bill Hertzel

13 1.95k 7.96k

Just watched a couple of You Tube Videos of the Water and Seafoam treatments.
Neither of them worked worth a hoot. Snake-Oil.!

Another thread reminded me to remind you to check that the spark plugs have Heatsink compound, and NOT Anti-Seize!, on the plugs.
Without the heatsink compound, the plugs will run much hotter and may act like a glow plug keeping the engine running.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Report
Re: Ignition module won't shut off

by Joe Kulbeth » 7 years ago

Joe Kulbeth

1 17 0

I kinda thought about that and it to is snake oil treatment, I would only do something like to an old Ford or Chevy inline six around the mid term of last century just to see if there was something to it. I do us each and every time the heat sink. I think if is very important to apply it.

I will not have time for a long while to pursue this repair, but I sure have gained lots of insight from all of the people that has become interested in my problem. I will let everyone know how it turns out when I get done with it.

Thank you said by: RotaxOwner Admin

Report
Re: Ignition module won't shut off

by Thomas Wirl » 7 years ago

Thomas Wirl

0 1 0

Hi, we had a similar problem in a motor glider.
As it looks the mixture was too fat and coal was building up on the spark plug or the cylinder.
Finally we had the carbs overhauled and the problem was gone. Also the floats had overweight.

Report
Re: Ignition module won't shut off

by Joe Kulbeth » 7 years ago

Joe Kulbeth

1 17 0

I think the last blogger got it right this time when he said they over hauled the carbs and the problem went away. He see above where he mentioned the floats were heavy, meaning they where sinking down into the fuel bowl and not shutting off the fuel completely. My conclusion is below.

Soooo, it the floats were heavy and sinking in the fuel bowl, that would allow the needle valve to come unseated and allow fuel to flow out of the fuel bowl. With the engine turning and the floats working properly (floats floating to the top of the fuel level in the bowl) would close off the outlet and not allow fuel flow to the cylinders, the engine stops. The propeller is turning, the pistons are going up and down causing air to be drawn through the ventura of the carburetor, creating a low pressure area in the carburetor, and the floats NOT seating and closing off the outlet, then fuel is free to pass onto and into the cylinders where it is hot enough to cause that type of explosion like dieseling when the ignition modules are turned off.

Joe Kulbeth Fresno, CA.

Report

Page 3 of 5

Start
Prev
1
2
3
4
5
Next
End

You do not have permissions to reply to this topic.

Title	Category	Replies
CLNT TEMP Overheat after engine shutdown	915iS Technical Questions	2
Engine shutdown problem	912 / 914 Technical Questions	1
912ULS 966-727 vs 965-445 Ignition Module Question	912 / 914 Technical Questions	2
Ignition Coil Connector	912iS Technical Questions	1
Poor workmanship on replacement Rotax ignition coils	912 / 914 Technical Questions	9

Ignition module won't shut off

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login