A4 alternator? - Page 4 - SailNet Community
LinkBack Thread Tools
post #31 of 32 Old 04-01-2013
Junior Member
Join Date: Sep 2010
Location: Montreal
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Re: A4 alternator?

Norah, perhaps you could simmer down just a bit. There is nothing wrong with seeking advice in forums such as this one. Also no point in being so rude and telling people they don't know what they are doing... I think it's a relevant question to ask why can the sparks generated by an alternator be so dangerous while the Ingniton system is way more prone to issue sparks in the engine room... BTW I got my original marine alternator rebuilt and still will make sure not to get anywhere near you or your boat...
Isla30 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #32 of 32 Old 04-01-2013
Join Date: Apr 2006
Posts: 12,399
Thanks: 6
Thanked 184 Times in 181 Posts
Rep Power: 13
Re: A4 alternator?

"I think it's a relevant question to ask why can the sparks generated by an alternator be so dangerous while the Ingniton system is way more prone to issue sparks in the engine room... "
An alternator routinely makes sparks as the copper rings rotate under the graphite contacts. The sparks are normal. And that's why conventional alternators have wire screens (called "ignition protection" or "spark protection") installed over all air gaps, in the theory that the fine metal mesh will extinguish any flame front from the vapors getting to the spark.
On the other hand, an ignition system in proper working order DOES NOT routinely make any sparks. It conducts the ignition pulses 100% through the conductor in the wire, from the coil to the plugs, and there is never any sparking except inside the engine, or inside the distributor where the rotor and cap are also routinely sparking--but in a sealed enclosure.

It can be damned hard to make fuel combust, or explode. If you've ever tried to get an engine going and it wouldn't start, that's proof of how hard it can be to make the damned fuel explode as it is intended to.

Of course if you've ever spent time in a burn ward, where they put victims in a coma because even morphine cannot blot out the pain from extensive burns, you develop a whole new respect for the concept of explosions and flammable liquids. There are some places you never want to be. A bed in a burn ward is real close to the top of that list.
Jimmy E likes this.
hellosailor is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome