Reply
 
Thread Tools Search this Thread
 
Old 07 April 2013, 11:11   #1
Member
 
Country: UK - England
Town: newcastle upon tyne
Length: 6m +
Engine: mariner outboard pet
Join Date: Apr 2013
Posts: 4
mariner 60 engine problem

i have a mariner 60 2 stroke, when last using it at almost full throttle the engine suddenly revved up to full speed but the boat lost drive, put it into neutral and was ok again for around an hour. the problem reoccurred later, and since then if i try to go forward anything faster than tickover it does the same thing, like its going into neutral. reverse is fine, only forward. when in gear i can turn the prop by hand and hear a clicking sound. any advice would be greatly appreciated
__________________

__________________
poloeyes is offline   Reply With Quote
Old 07 April 2013, 11:31   #2
Member
 
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,194
could be Gear linkage adjusted wrongly.....sounds like it might have only just been in forward gear... . does the gear slider go equally forward and reverse, this is under the hood...also possibly like the rubber has given up in the centre of the prop possibly..first thing first, can you hand turn the prop either way when out of the water? ok take the prop off and check it out, if its that bad you will see tell tale signs of it.
__________________

__________________
matt h is offline   Reply With Quote
Old 07 April 2013, 11:48   #3
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
I think some of the Merc/mariner engines had a free wheel set up so the prop can still spin one way bit not the other if still in gear. Give it a spin to see if this the case...one problem solved maybe.

But the actual problem sounds like a prop bush to me...

Of course if the prop spins both ways by hand it's the gearbox somehow..
__________________
PeterM is offline   Reply With Quote
Old 07 April 2013, 12:46   #4
Member
 
Country: UK - England
Town: southampton
Boat name: hydradrive
Make: yamaha
Length: no boat
Engine: sterndrives
Join Date: Sep 2012
Posts: 289
Prop bush
__________________
yam man is offline   Reply With Quote
Old 07 April 2013, 13:37   #5
Member
 
Country: UK - England
Town: newcastle upon tyne
Length: 6m +
Engine: mariner outboard pet
Join Date: Apr 2013
Posts: 4
thanks for the replies.
unfortunately its not the prop bush, that was my first thought (and hope).
gear linkage? dont know anything about that, some pointers would be helpful.
i did have the engine serviced prior to the last time i used it, if that could make a difference
__________________
poloeyes is offline   Reply With Quote
Old 07 April 2013, 13:52   #6
Member
 
Country: UK - England
Town: Bristol
Make: Ribcraft
Length: 5m +
Engine: Yamaha
Join Date: May 2006
Posts: 4,194
gear linkage adjustment? ok, tilt the engine up and take cover off, if poss put in full forward gear and full reverse whilst watching the gear slider... you will see it .... take a note of the gear selecter slider bar, when forward gear full it should slide full movement forward (or back cant remember) and when reverse should move in opposite direction, neutral will be in the middle.if different to my description adjust with the cable adjustment accordingly.
Im thinking the cable is so worn that its not reaching full forward and slippin out of gear.
__________________
matt h is offline   Reply With Quote
Old 07 April 2013, 14:30   #7
Member
 
Country: UK - Scotland
Town: Argyll
Boat name: Helena
Make: Birchwood
Length: 5m +
Engine: Inboard Diesel 250hp
Join Date: Jun 2011
Posts: 116
How can you tell it's not the prop bush? If there was a problem in the gearbox then you'd be getting serious problems if it was jumping in and out of gear at full rpm in fact I'd be surprised if the box didn't explode. I'd double check the prop bush and if In doubt try another prop to be sure as what you are describing is exactly that of a failed prop bush.
__________________
peterwhite is offline   Reply With Quote
Old 07 April 2013, 15:38   #8
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,335
Dont think it sounds like gear linkage, it would be jumping in and out of gear if the linkage was out and you would really know about that!. Does sound like the prop hub to me, push the busing out if its a flow torq hub and check it for cracks etc.
__________________
Black Dog Marine
www.blackdogmarine.com
Turbodiesel is offline   Reply With Quote
Old 07 April 2013, 17:21   #9
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
Unlikely to be a flowtorq hub on a 60hp 2 stroke?

Mark the prop and the prop nut in line and see if the two line up after trying to use it?
__________________
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 08 April 2013, 06:17   #10
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
....or take the prop off & have a very close look at the rubber - metal joint. There will be traces of "extruded" rubber oozing out of the joint if it's gone.

Reason it's OK after a while at rest is the rubber starts to melt as the hub & the body spin at different speeds. When you stop, it's surrounded by seawater, so the rubber re-solidifies.

I would have thought if it was slipping out of gear you would hear a LOT of clattering - think missing the clutch in your car - that ain't quiet!

Can you borrow a prop off someone or put your prop on another engine?
__________________

__________________
9D280 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


» Member's RIBs

BWA

sparrow

RESCUE

cam
Add your RIB



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:24.


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