Reply
 
Thread Tools Search this Thread
 
Old 14 February 2009, 11:55   #1
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Suzuki DT75/85 Powerhead Wanted

I'm looking for a good clean powerhead for a late '90s Soozook DT75 or DT85.
Anyone got one?
__________________

__________________
Downhilldai is offline   Reply With Quote
Old 19 February 2009, 14:49   #2
Member
 
Country: UK - England
Town: Surrey
Length: no boat
Join Date: Feb 2009
Posts: 215
mmmm thats going to be a hard one . whats wrong with your powerhead ?
__________________

__________________
outboardtech is offline   Reply With Quote
Old 19 February 2009, 16:51   #3
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Bottom piston has blown. I haven't stripped the crank out yet, so don't know if a rebuild will be economic. Possible, if the damage is contained to the bottom pot and the crank has survived.

Hoping to get a powerhead from a motor with a knackered lower unit.

Do you have anything there, which may be of use?
__________________
Downhilldai is offline   Reply With Quote
Old 20 February 2009, 15:36   #4
Member
 
Country: UK - England
Town: Surrey
Length: no boat
Join Date: Feb 2009
Posts: 215
yip thats the best way to go at the moment . Strip that block and check how bad it is . It may just be a scored Bore with a damaged ring and that will be easy to replace . Bore it out to the oversize piston and away you go . let me know and pics would be great
__________________
outboardtech is offline   Reply With Quote
Old 03 March 2009, 16:34   #5
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Piston Broke

As suspected, the bottom piston has blown and the bore is pretty badly scored too. The main bearing between mid and bottom cylinders has collapsed and there's a lot of swarf all around the bottom cylinder.
I think a rebuild may be too costly on this one, so still on the lookout for a replacement powerhead.
Attached Thumbnails
Click image for larger version

Name:	Image065.jpg
Views:	221
Size:	65.8 KB
ID:	40904   Click image for larger version

Name:	Image139.jpg
Views:	182
Size:	70.9 KB
ID:	40905   Click image for larger version

Name:	Image136.jpg
Views:	189
Size:	79.4 KB
ID:	40906  
__________________
Downhilldai is offline   Reply With Quote
Old 19 August 2011, 13:08   #6
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Still looking for a powerhead, but wll break the motor, if anyone's interested. It's 1997 and all the bits except the block, crank and bottom piston/conrod are re-cyclable. Good lower unit, PTT, control box, carbs, etc., etc.
__________________
Downhilldai is offline   Reply With Quote
Old 08 April 2012, 08:19   #7
Member
 
Country: UK - England
Town: Bristol
Length: 5m +
Join Date: Mar 2006
Posts: 338
Do you still have this?
Tentatively looking at ways to make my 1991 DT85 a bit more reliable as replacement is completely out of the question.
Possibly looking at worn carbs so if you have a price in mind and they're compatible.

Issue I have is that middle cylinder is down a little on compression and at the moment it dies when you try to put it into gear and open it up from idle. Runs OK when going!

As an aside, can I do anything to improve a cylinder compression other than rebore and oversize the new parts?

Cheers,

Orve.
__________________

__________________
David G 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 05:19.


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