912ULS start problem

by Zack in 912 / 914 Technical Questions 5 years ago

Hi

I have a start problem with my 912ULS in the video

Look like kickback ,but i'm not sure .I've check electricity system ,relay,battery,spark plug ,oil and not check SPRAG CLUTCH

It's just SPRAG CLUTCH problem ?

https://www.youtube.com/watch?v=5YC1E_B5OkI

Thank you for considering my question

Re: 912ULS start problem

by Peter Kl. » 5 years ago

Peter Kl.

6 213 345

It does look and sound a little weird.
Perhaps it is worth measuring the force you need to apply to turn the prop and compare your findings with handbook values.
It may also be interesting to know the revs/min your engine achieves since a certain level is required for the ignition to do its job. Too low revs - no ignition.
Regards
Peter

Thank you said by: Zack

Report
Re: 912ULS start problem

by Zack » 5 years ago

Zack

1 2 0

Hi Peter

Thank you for the reply

Sorry my description is not detailed.
My problem is not no ignition, it can ignition easily.
My problem is before ignition . It's shows weird move before ignition.

Thank you for considering my question

Zack

Report
Re: 912ULS start problem

by Kevin Machniak » 5 years ago

Kevin Machniak

6 167 40

I watched the video, to me it looks like it is not rotateing fast enough. I would try a new battery first thing. Is it hard to turn over by hand? Are the carbs set up and balanced per the manual?

Thank you said by: Zack

Report
Re: 912ULS start problem

by Zack » 5 years ago

Zack

1 2 0

Hi bravo

Thank you for the reply

I have change a new battery this video,and it's not easily to turn over by hand.
Is carbs means propeller ? If yes ,I don't change propeller balance before this happen,and is balanced before.

Thank you for considering my question

Zack

Report
Re: 912ULS start problem

by Peter Kl. » 5 years ago

Peter Kl.

6 213 345

Hi Zack,
check the line maintance manual for "measuring tourque required to turn crank drive" - that should give you confidence on what to look for and how to proceed (e.g. MML_912Series ED3_R2_e.pdf, chapter 3.12, page 22).
Just an idea. Good luck.
Peter

Thank you said by: Zack

Report

You do not have permissions to reply to this topic.

Title	Category	Replies
912iS Dual Flashing Lane Light at Startup	912iS Technical Questions	3
914 Not Starting after an Year	912 / 914 Technical Questions	4
RPM issue, first start, new engine	912 / 914 Technical Questions	8
Roger Lee 912uls	912 / 914 Technical Questions	17
Selling my Rotax 912ULS - Price?	General Tech Discussion	3

912ULS start problem

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login