Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 17-02-2011, 11:27   #1
Marine Service Provider

Cruisers Forum Supporter

Join Date: Jul 2010
Location: On the Go
Boat: Various
Posts: 666
Honest, it Wasn't Me

The story started, “It wasn’t funny at the time but....” Happened to a friend of a friend. Hoping to save money on a starter for his marinized Chevy engine, this bloke bought an automotive starter but without attention to rotation. You guessed it. It started fine but sucked half the bay into his engine.
__________________

__________________
Janet Groene
JanetGroene is offline   Reply With Quote
Old 17-02-2011, 12:13   #2
Registered User
 
S/V_Surya's Avatar

Join Date: Mar 2009
Location: Sasafra river,MD
Boat: gulfstar ketch 41 Surya
Posts: 658
I did not think that was possible. I thought engines will only run in one direction. I have never heard of this and I am older than dirt.
__________________

__________________
S/V_Surya is offline   Reply With Quote
Old 17-02-2011, 12:15   #3
Registered User

Join Date: Jun 2009
Location: STX and Portland, until refit finished
Boat: 1999 Steel (Tom Collin's design)
Posts: 371
Detroit diesel engines will run backward.

Chevy gas engines won't.
__________________
ViribusUnitis is offline   Reply With Quote
Old 17-02-2011, 12:52   #4
Registered User

Join Date: Jun 2009
Posts: 146
If a gas engine didn't start but was tried in wrong rotation might it not become hydrolocked? A diesel if does not start right away can become hydrolocked. Thats why if having problems starting shut off water inlet.
__________________
blgklr is offline   Reply With Quote
Old 17-02-2011, 12:57   #5
Freelance Delivery Skipper..
 
boatman61's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: Jan 2010
Location: UK/Portugal
Posts: 20,205
Images: 2
Send a message via Skype™ to boatman61
pirate

LOL.... reminds me of when I was servicing a 2x Jawa 350cc bike... got distracted by a pretty girl while I was replacing the timing gear...
Man... did I get a shock when I shot backwards in 1st gear....
They were 'Very Nice Legs' though...
__________________


Born To Be Wild
boatman61 is online now   Reply With Quote
Old 17-02-2011, 13:47   #6
Registered User
 
Jesse's Avatar

Join Date: Apr 2008
Location: Oro Bay Puget Sound
Boat: Irwin sloop
Posts: 374
A number of years ago my friend who rode a "Cotton " motorcycle discovered it ran backwards quite well after releasing the decompression lever while pushing it backwards, he would then put the gearbox in neutral and offer it to anyone wanting a ride. Riding "Bobs Cotton" was considered a "Rite Of Passage" and you were rated on time ,distance, and speed. It had a Cornucopia type exhaust system so we couldn't hear the screaming and profanity.
__________________
Jesse is offline   Reply With Quote
Old 17-02-2011, 14:20   #7
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 11,450
G'Day Janet,

Well, I think that this is another silly urban legend. As others have already said, four stroke engines, whether gas or diesel, will not run backwards, no matter which direction one cranks them. Don't know what happened to the "friend of a friend", but the story has been embellished beyond belief... like so many others!

Two strokers are a different matter!

Cheers,

Jim
__________________
Jim and Ann s/v Insatiable II , lying Port Cygnet, Tasmania once again
Jim Cate is offline   Reply With Quote
Old 17-02-2011, 14:39   #8
Registered User
 
S/V_Surya's Avatar

Join Date: Mar 2009
Location: Sasafra river,MD
Boat: gulfstar ketch 41 Surya
Posts: 658
Here is a mythbusters link on this question.

Can an Engine Run Backwards - Topic Powered by Social Strata
__________________
S/V_Surya is offline   Reply With Quote
Old 17-02-2011, 14:57   #9
Registered User
 
courageous cat's Avatar

Join Date: Mar 2008
Location: michigan
Boat: g-cat 5. m
Posts: 156
Images: 1
MythBusters this one is busted. You have to get up pretty early to put one over on yuo guys
__________________
courageous cat is offline   Reply With Quote
Old 17-02-2011, 15:27   #10
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
I lost a cam shaft in an old LH 409 Crusader. Ended up having to buy twin 427's (left and right hand) just because of a cam shaft.

But i couldn't believe what it dii to the boat. Have you ever seen a 13 ton semi-dispalcement hull up on a plane at 26 kt.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 17-02-2011, 15:39   #11
Registered User
 
ShaunJ's Avatar

Join Date: Oct 2010
Location: Md, USA
Posts: 430
I was recently on "John Arthur" an old tug boat with an atlas Imperial Engine. This is a 1942 70' tug, to put it in reverse you would have to stop the engine and start it backwards. this takes about 8 seconds....

ShaunJ

__________________
ShaunJ is offline   Reply With Quote
Old 17-02-2011, 16:36   #12
Registered User
 
avb3's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Florida/Alberta
Boat: Lippincott 30
Posts: 9,913
Images: 1
A friend of mine owned a used car lot and got a 911 Porsche in on trade.

As usual, the first thing he did was check the oil; it showed low.

So, he added oil, like we all would, right?

WRONG!

When he started the engine, he promptly blew it as the oil was overfull. WTF? How did THAT happen.

$6,000 later (this was back in the early '80's), he found out you had to check the oil in a 911 with the engine RUNNING, same as when your checking most automatic transmissions.

We all teased him about if for years.
__________________
avb3 is offline   Reply With Quote
Old 17-02-2011, 17:52   #13
Moderator
 
nigel1's Avatar

Cruisers Forum Supporter

Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,184
Quote:
Originally Posted by ShaunJ View Post
I was recently on "John Arthur" an old tug boat with an atlas Imperial Engine. This is a 1942 70' tug, to put it in reverse you would have to stop the engine and start it backwards. this takes about 8 seconds....

ShaunJ

Quite common on the older diesel engined cargo ships and tugs before CPP became the norm.
Basically the cam shaft is moved to change how the inlet and exhaust valves open/close. The engine is then re-started on air.
Too many starts would use more air than the start air compressor could keep up with, always amusing when the chief calls up to the bridge to let them know they have enough air for one more start.
__________________
Nigel
Beneteau 473
Manchester, UK
nigel1 is online now   Reply With Quote
Old 18-02-2011, 04:06   #14
Registered User
 
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,816
Images: 139
Quote:
Originally Posted by nigel1 View Post
Quite common on the older diesel engined cargo ships and tugs before CPP became the norm.
Basically the cam shaft is moved to change how the inlet and exhaust valves open/close. The engine is then re-started on air.
Too many starts would use more air than the start air compressor could keep up with, always amusing when the chief calls up to the bridge to let them know they have enough air for one more start.
Cool.
__________________
James
S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 18-02-2011, 04:57   #15
Registered User

Join Date: Feb 2009
Posts: 1,848
In the 60s merc had an inline 6 OB that restarted in reverse...didnt last that long......WONDER WHY?
__________________

__________________
motion30 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
VHF, OK, BE HONEST, DO YOU KNOW... Bob Norson Marine Electronics 46 28-02-2008 19:24
I am not the anti-Christ, honest. clsailor Meets & Greets 7 15-06-2007 23:28



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:35.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.