Reply
 
Thread Tools Search this Thread
 
Old 17 March 2013, 14:20   #1
Member
 
lockieboi's Avatar
 
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
Might explain why its not working!!!

Any ideas how this could of happened?
Attached Thumbnails
Click image for larger version

Name:	image-3817097636.jpg
Views:	147
Size:	52.3 KB
ID:	77704   Click image for larger version

Name:	image-3894675967.jpg
Views:	144
Size:	49.2 KB
ID:	77705   Click image for larger version

Name:	image-1870134989.jpg
Views:	152
Size:	51.4 KB
ID:	77706  
__________________

__________________
lockieboi is offline   Reply With Quote
Old 17 March 2013, 14:31   #2
Member
 
xs 400's Avatar
 
Country: UK - England
Town: yeovil
Boat name: Lilly of lyme
Make: XS
Length: 4m +
Engine: 30hp Yamaha
Join Date: Jul 2011
Posts: 631
hi there!

if thats a piston, if those are scores in the piston, has the piston ring broken up and caused it??

oil starvation?

whats the bore like ?


hope you get it sorted.....hope to catch up with you again this year, lulworth the return
__________________

__________________
xs 400 is offline   Reply With Quote
Old 17 March 2013, 14:31   #3
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Major overheat - presuming it's a 2-stroke, no oil in fuel, no water circulation within the engine.
__________________
JW.
jwalker is offline   Reply With Quote
Old 17 March 2013, 14:51   #4
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Quote:
Originally Posted by jwalker View Post
Major overheat - presuming it's a 2-stroke, no oil in fuel, no water circulation within the engine.
Yep.If only one piston, maybe an air leak or blown crank seal too.

You need to find the problem before you go repairing the damage.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 17 March 2013, 15:00   #5
Member
 
lockieboi's Avatar
 
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
Thanks guys.
The piston rings have been replaced and its now running but obviously I want to find out why it's happened before i run it to much.

The bores are a bit scored also.

It's always been run with oil in the fuel 50:1 whilst I've owned it obviously I can't speak for the previous owner.
__________________
lockieboi is offline   Reply With Quote
Old 17 March 2013, 15:15   #6
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
That piston is FUBAR. Don't run it again .You need a rebore as well.

If you carry on running it, it'll seize and it may trash the bore so badly you'll have to either scrap it or put new liners in.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 17 March 2013, 15:19   #7
Member
 
lockieboi's Avatar
 
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
Quote:
Originally Posted by Nos4r2 View Post
That piston is FUBAR. Don't run it again .You need a rebore as well.

If you carry on running it, it'll seize and it may trash the bore so badly you'll have to either scrap it or put new liners in.
Thought as much.

The pictures are of both pistons, the first picture is of the top and the other 2 are of the bottom. Not sure if this helps with diagnosis.
__________________
lockieboi is offline   Reply With Quote
Old 17 March 2013, 18:03   #8
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Yep, it's totally fubar. Probably overheat damage at a guess then.

It needs a rebore on both cylinders and new oversize pistons. Probably needs new bearings as well-those bits of metal that are missing all go somewhere...
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 17 March 2013, 18:18   #9
Member
 
lockieboi's Avatar
 
Country: UK - England
Town: kent
Boat name: SIBotage
Make: Prowave
Length: 3m +
Engine: 15hp Johnson 2 smoke
Join Date: Sep 2010
Posts: 435
Thanks for the help.

Any ideas how it could of overheated? Maybe a faulty thermostat?
It's always had a steady flow of cooling water.
__________________
lockieboi is offline   Reply With Quote
Old 17 March 2013, 18:27   #10
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
No idea- wrong oil, carrier bag round the prop, furred up waterways? Could be a faulty stat if it's a model thats got one.

I'd price the repair up before you commit to anything-it may be cheaper to flog it as spares and buy another motor.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 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 05:41.


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