Reply
 
Thread Tools Search this Thread
 
Old 05 April 2011, 17:02   #1
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
snaring sound on DT65

dear Forum,
during winter some silly bastards have obviously thrown some rocks near my mooring - just below surface...
so last week i shredded the prop of my Suzuki DT65. all 3 blades roughly bitten.
so i bought a new one and it ran fine first.

but now i have a strange new snaring sound when in gear. in neutral it runs fine and only shakes frequently when on very low revs.
when in gear it makes a snaring sound, getting faster when boat goes faster.
a couple of days before that i had a soft squeeking sound when in gear and going slow. didnt sound too nice, but also not too bad to worry.

the new snaring sounds very worrying.

it would be great to get advice on what to do.

is there a valve where i can enter oil or fat, or did i kick the shaft or anything mechanical?
i hope its nothing mayor - the DT65 is such a reliable workhorse. would be a shame.

thank you for your helpful advice
jan
__________________
jvb is offline   Reply With Quote
Old 05 April 2011, 18:14   #2
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Is the propshaft running true?
__________________
Downhilldai is offline   Reply With Quote
Old 05 April 2011, 18:16   #3
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
yes - prop running

Quote:
Originally Posted by Downhilldai View Post
Is the propshaft running true?
yes, boat goes to normal speed. just the snaring gets faster and it just doenst sound healthy.
__________________
jvb is offline   Reply With Quote
Old 05 April 2011, 19:46   #4
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Quote:
Originally Posted by jvb View Post
yes, boat goes to normal speed. just the snaring gets faster and it just doenst sound healthy.
No throw in the propshaft?
__________________
Downhilldai is offline   Reply With Quote
Old 06 April 2011, 20:48   #5
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
Quote:
Originally Posted by Downhilldai View Post
No throw in the propshaft?
sorry for my lacking english.
i guess you mean whether the shaft is warped.
how can i check this?
take off prop and have it running?

thank you for your help!
__________________
jvb is offline   Reply With Quote
Old 06 April 2011, 20:53   #6
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
Give the bloke a break Bradders. Imagine what "No throw in the propshaft" is likely to throw up when put through Google translate.
__________________
Mollers is offline   Reply With Quote
Old 11 April 2011, 18:46   #7
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
well.
obviously it is something more serious.

i went to the outboard garage today.
he said that the suzuki dt65 s basically old and fine if it runs - but if never properly serviced (like mine) and broken (like mine) then better not to be touched.
is this correct?? i felt it is a solid workhorse.

we tried unmounting the heel an immediately broke the two stainless boltheads. then even with sensitivity handled we broke the corroded aluminium casted piece holding the cone seat.
nice 2.

he then offered a brand new 80hp 4 stroke suzuki instead. or to repair it in a couple of weeks.
nice 3.

so i am a complete amateur to engines.
i feel all stainless parts meeting aluminium cast are pretty corroded and likely to break.
i still dont know where the rattling comes from and the mechanic said he guesses that probably under the engine one bearing might be gone. or the shaft itself.


what do you suggest...???
do a training in engine surgery or buy a new one?
where would i get a decent used one - at this time of the year...?
nice

damn that rock...
__________________
jvb is offline   Reply With Quote
Old 11 April 2011, 19:20   #8
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,053
RIBase
If you are having that much problem with corrosion,sell it and buy another one. It is not going to be easy to get to the fault without breaking something.
__________________
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 11 April 2011, 20:29   #9
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Doesn't sound good. Is the propeller hitting the gearcase?

If that noise is there only when in gear, then you're probably best looking to replace the lower unit with a used one. Repairing the original is likely to cost more than the engine's worth.

The DT65 is a pretty good motor, so would be a shame to scrap it if everything else is ok.

Good luck.
__________________
Downhilldai is offline   Reply With Quote
Old 17 April 2011, 17:46   #10
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
thank you guys,
i managed to unmount the lower unit with some helping heat.
burnt some of the seals but now the reason for the sound is obvious:
the gear set in the transmission lost some teeth.
so on the one hand i am glad to have found the fault - on the other hand i am now trying to get some spare parts.
where should i ask to get the missing parts (attached)?
will they be available from any suzuki workshopp or will it be a disaster to find them online somewhere?
thank you for your help,
jan
Attached Thumbnails
Click image for larger version

Name:	fig033-5565-8897.jpg
Views:	371
Size:	102.5 KB
ID:	58404   Click image for larger version

Name:	fig018-5565-8897.jpg
Views:	188
Size:	50.4 KB
ID:	58405   Click image for larger version

Name:	fig008-5565-8897.jpg
Views:	202
Size:	82.7 KB
ID:	58406  
__________________
jvb is offline   Reply With Quote
Old 17 April 2011, 18:01   #11
Member
 
Join Date: Jun 2010
Posts: 2,934
i wouldn't like to imagine the bill for those bits IF you can even find them new.

i would think getting a used lower unit is going to be the only way to proceed. i'd do some research on what gearcases will fit on that engine and get some wanted adds up. i.e 50-75hp lower units maybe the same? guessing on that but you get idea.

cheers
__________________
Xk59D is offline   Reply With Quote
Old 18 April 2011, 08:41   #12
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Try IMS (International Marine Supplies) - they keep loads of old Soozook parts.
__________________
Downhilldai is offline   Reply With Quote
Old 19 April 2011, 12:41   #13
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
thank you guys,
in the end the simplest way was the way to take.
ordered via a suzuki dealer and it was 300£ for all parts. delivery within a day.
mounting will take place tomorrow.
i hope i will manage to put the parts together in the right way... ;-)

thank you for your help!
j
__________________
jvb is offline   Reply With Quote
Old 19 April 2011, 21:33   #14
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
£300 sounds cheap. I rebuilt a DT85 lower unit in 1995 and it cost over £500 for parts then.

If you haven't rebuilt a lower unit before with new gears, then I'd recommend you get a good service manual (preferably a factory one), as it isn't simply a matter of replacing old with new.
__________________
Downhilldai is offline   Reply With Quote
Old 19 April 2011, 21:36   #15
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
Quote:
Originally Posted by Downhilldai View Post
£300 sounds cheap. I rebuilt a DT85 lower unit in 1995 and it cost over £500 for parts then.

If you haven't rebuilt a lower unit before with new gears, then I'd recommend you get a good service manual (preferably a factory one), as it isn't simply a matter of replacing old with new.
uff, now you scared me.
thought it is just a plug&play.
where would i get a manual and where is the difficulty?
thank you!
j
__________________
jvb is offline   Reply With Quote
Old 19 April 2011, 21:49   #16
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Your Soozook dealer should be able to supply you with a manual.

The gearset needs to be shimmed to ensure the forward, reverse and pinion gears mesh correctly. You may be lucky with the shims from your old gears, but this is unlikely, in which case, you'll need a set of different thickness shims to go with the new gearset. Choosing the correct thickness is a case of trial & error, using 'engineers blue' to check where the gears mesh with each other, then stripping down & rebuilding with different thickness shims until you get it right. Soozook dealers will have a box of different thickness shims to choose from, but as you're doing the job as a 'one-off', it probably isn't worth your while buying a whole set. Probably worth getting a quote from a dealer/specialist for the rebuild, as it isn't a job to be taken lightly.
__________________
Downhilldai is offline   Reply With Quote
Old 19 April 2011, 21:57   #17
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
Quote:
Originally Posted by Downhilldai View Post
Your Soozook dealer should be able to supply you with a manual.

The gearset needs to be shimmed to ensure the forward, reverse and pinion gears mesh correctly. You may be lucky with the shims from your old gears, but this is unlikely, in which case, you'll need a set of different thickness shims to go with the new gearset. Choosing the correct thickness is a case of trial & error, using 'engineers blue' to check where the gears mesh with each other, then stripping down & rebuilding with different thickness shims until you get it right. Soozook dealers will have a box of different thickness shims to choose from, but as you're doing the job as a 'one-off', it probably isn't worth your while buying a whole set. Probably worth getting a quote from a dealer/specialist for the rebuild, as it isn't a job to be taken lightly.
thank you for the explanation, this helps.
specialists are all booked these days and i only have an older gentlemen builder trying his best.
the engeneers blue will help and then i hope it all works.
will we need all 3 sets of shims? so# 8,13,23?
Attached Thumbnails
Click image for larger version

Name:	fig033-5565-8897.jpg
Views:	151
Size:	28.5 KB
ID:	58483  
__________________
jvb is offline   Reply With Quote
Old 19 April 2011, 22:06   #18
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
You'll need a range of different thickness shims for each of the 3 gears to be certain of getting it right. Sometimes the fwd & rev gears use the same shims - can't remember if this is the case with the DT65. You may get lucky and be able to recycle some of the ones you have, but don't rely on this.
__________________
Downhilldai is offline   Reply With Quote
Old 19 April 2011, 22:09   #19
jvb
Member
 
Country: Germany
Town: hamburg
Boat name: Jenny
Make: SR 5.4
Length: 5m +
Engine: Suzuki DT65+Merc90
Join Date: Aug 2009
Posts: 54
Quote:
Originally Posted by Downhilldai View Post
You'll need a range of different thickness shims for each of the 3 gears to be certain of getting it right. Sometimes the fwd & rev gears use the same shims - can't remember if this is the case with the DT65. You may get lucky and be able to recycle some of the ones you have, but don't rely on this.
great, thank you for this!
will a service manual do any difference?
tried downloading from the web but it seems they are all fake / costly.
__________________
jvb is offline   Reply With Quote
Old 19 April 2011, 22:17   #20
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
The SELOC manual is pretty good at describing the procedure.
__________________
Downhilldai 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




All times are GMT. The time now is 16:00.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.