Reply
 
Thread Tools Search this Thread
 
Old 24 January 2012, 11:32   #1
Member
 
Country: UK - England
Make: Bombard Aerotec 380
Length: 3m +
Engine: Mariner 25hp
Join Date: Nov 2009
Posts: 94
kick back when trying to pull start my 25hp

Hi guys im hoping you can help.

I have a 25hp 2 stroke. When I try to pull start the engine I get about halfway and the flywheel just stops turning. I spoke to a guy over the weekend who reckons this is a common problem with older engines and theres nothing I can do about it apart from slowly pulling the pull start all the way out and trying again. IT happens a good few times before I get the engine going.


Any idea's?

OH forgot to say, the problem is become more common the more I use it
__________________

__________________
bigscott is offline   Reply With Quote
Old 24 January 2012, 11:39   #2
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Sounds sort of normal for pull starting. I have (I think) the same engine and it just needs a really good pull.

The modern motors have all sorts of fancy things to reduce the compression on pull starting but I think you are just feeling the cylinder compress as it comes up the stroke - just before they go 'pop' and the motor starts.

The solution is I think just pull harder......

I'm starting mine on Sat morning - if I remember I'll video it ...
__________________

__________________
PeterM is offline   Reply With Quote
Old 24 January 2012, 11:47   #3
Member
 
Country: UK - England
Make: Bombard Aerotec 380
Length: 3m +
Engine: Mariner 25hp
Join Date: Nov 2009
Posts: 94
Aahh thanks for the quick reply PeterM its good news to know its not dying on me (hopefully)

It seems to happen regardless of how hard I pull so im going to buy a new pull cord and carry a backup just incase
__________________
bigscott is offline   Reply With Quote
Old 24 January 2012, 12:05   #4
RIBnet supporter
 
Ian M's Avatar
 
Country: UK - England
Town: New Milton
Boat name: Jianna
Make: Osprey
Length: 6m +
Engine: 200 E-TEC
MMSI: 235076954
Join Date: Sep 2004
Posts: 1,933
When I was first instructed in the noble art of swinging an engine, I was told to turn the engine until I felt it come up to compression (ie felt a resistance on the pull cord - you can experiment by pulling it past this point and see if the resistance suddenly reduces significantly; it has then gone past TDC) let the recoil mechanism recover the pull cord fully in, and then pull for all you are worth Sorry if I am instructing you in egg sucking
__________________
Ian

Dust creation specialist
Ian M is offline   Reply With Quote
Old 24 January 2012, 13:00   #5
Member
 
Country: UK - England
Make: Bombard Aerotec 380
Length: 3m +
Engine: Mariner 25hp
Join Date: Nov 2009
Posts: 94
sounds Good Ian So it could very well be down to my technique aswell ( don't tell the wife )
__________________
bigscott is offline   Reply With Quote
Old 24 January 2012, 13:03   #6
RIBnet supporter
 
Ian M's Avatar
 
Country: UK - England
Town: New Milton
Boat name: Jianna
Make: Osprey
Length: 6m +
Engine: 200 E-TEC
MMSI: 235076954
Join Date: Sep 2004
Posts: 1,933

we'll keep it to ourselves shall we?
__________________
Ian

Dust creation specialist
Ian M is offline   Reply With Quote
Old 24 January 2012, 14:14   #7
Member
 
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 894
it sounds like it is the timming advancing ,it hurts like hell
__________________
uncle al is offline   Reply With Quote
Old 24 January 2012, 14:51   #8
Member
 
Country: UK - England
Make: Bombard Aerotec 380
Length: 3m +
Engine: Mariner 25hp
Join Date: Nov 2009
Posts: 94
Yes it Does!!!! especially 2 or 3 times in a row. How would I go about changing the timming or is this a job best left to the experts
__________________
bigscott is offline   Reply With Quote
Old 24 January 2012, 15:06   #9
Member
 
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 894
just have the throttle in the tickover position then pull to start if it still does kick back you will have to find either a linkage fell of somewhere or it could be stuck/siezed in the advanced position, if it is electric advance the ecm may be faulty, tick over to fast ther you are something to keep you out of mischief good luck
__________________
uncle al is offline   Reply With Quote
Old 24 January 2012, 17:18   #10
Member
 
Country: UK - England
Make: Bombard Aerotec 380
Length: 3m +
Engine: Mariner 25hp
Join Date: Nov 2009
Posts: 94
Cheers Uncle Al Ive had a quick look at the manual for checking and changing the timming. Lots of tinkering coming up
__________________

__________________
bigscott is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:04.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.