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  1. #1
    Join Date
    Sep 2018
    Posts
    8

    Default Volvo Engineer needed !

    Hi All !
    Our boat is in Cardiff Marina. We've got a problem with our ancient Volvo MS2 gearbox where it only engages forward and reverse gears at very high revs. I suspect some sort of 'cone' or 'clutch' issue; but i'm no expert. Can anyone recommend an engineer in the area who might be able to help us and fix it ? Thanks !

  2. #2
    Join Date
    Jul 2016
    Posts
    365

    Default Re: Volvo Engineer needed !

    Quote Originally Posted by robgoddard View Post
    Hi All !
    Our boat is in Cardiff Marina. We've got a problem with our ancient Volvo MS2 gearbox where it only engages forward and reverse gears at very high revs. I suspect some sort of 'cone' or 'clutch' issue; but i'm no expert. Can anyone recommend an engineer in the area who might be able to help us and fix it ? Thanks !
    I use Gareth Davies, of Davies Marine. Set up on his own after working for big Cardiff operation.

    Had always been good for me, pretty well experienced so has probably worked on Volvo’s.

    PM me for phone number if you need it.

  3. #3
    Join Date
    Jan 2007
    Posts
    5,025

    Default Re: Volvo Engineer needed !

    +1 for Gareth. But he's pretty busy at the moment. Have you tried changing the oil?

  4. #4
    Join Date
    Aug 2016
    Location
    Bristol
    Posts
    269

    Default Re: Volvo Engineer needed !

    Alan from SOS Boat Services might be able to help... http://www.sosboatservices.co.uk/
    YouTube: Gorjus Boating
    Boat: Sealine 195

  5. #5
    Join Date
    Sep 2018
    Posts
    8

    Default Re: Volvo Engineer needed !

    Thanks for the suggestions. I'll give them a try. Yes; I tried changing the oil in the hope of an easy / quick / cheap fix, but no change. So I'm bracing myself !

  6. #6
    Join Date
    Jul 2002
    Location
    Back in the UK & wondering why
    Posts
    201

    Default Re: Volvo Engineer needed !

    Have you tried disconnecting the cable from the side of the box and moving the selector lever manually whilst the engine is idling? The lever has a positive stop when at the correct position.



    Steve

  7. #7
    Join Date
    Sep 2018
    Posts
    8

    Default Re: Volvo Engineer needed !

    Hi Steve, Thanks for the reply. Yes I gave that a try; just to eliminate the cable and selector mechanism in case it wasn't setup correctly. Neutral (middle) = no prop spin. Forward = Prop turns when on idle; but as you build the revs the prop will spin faster but doesn't feel like there's any propulsion of the boat in the water. Only when we get to quite high revs does the propulsion 'kick-in' and you feel the effect and see the wash. In reverse (ad idle) the prop 'creeps' round very very slowly; until revs are flat out and it snaps into drive (that cant be doing the engine / transmission any good at all !) I cant think of anything else to try, so resigning myself to an engineer looking at it.

  8. #8
    Join Date
    Jul 2002
    Location
    Back in the UK & wondering why
    Posts
    201

    Default Re: Volvo Engineer needed !

    I'm no engineer and my problem was the opposite - very hard to get out of gear, but it does sound like a wear issue with perhaps the selector sleeve slipping in the gears until the extra revs cause the servo spiral to really ram the sleeve home. As I say, no engineer just semi experienced speculation.

    They're not to hard to do a basic stripdown, and the special tools can as usual be improvised, but sad to say you'll find no shortage of people tell you that parts for these are like hen's teeth nowadays. (I'm still waiting for a bit possibly located in the US)

    I suppose the obvious questions would be what was the old oil like? Burnt? What grade oil did you use? (there's some doubt as to the correct one. The recommedation changed over the years, possibly in sync with a change in friction medium)

    While you wait for the engineer you could try adjusting the shims under the selector centre bolt.

    Pm your e mail address if you need a pdf of the workshop manual.

    Good luck

    Steve
    Last edited by smb; 26-03-19 at 15:37. Reason: typo

  9. #9
    Join Date
    Jan 2007
    Posts
    5,025

    Default Re: Volvo Engineer needed !

    Quote Originally Posted by robgoddard View Post
    Hi Steve, Thanks for the reply. Yes I gave that a try; just to eliminate the cable and selector mechanism in case it wasn't setup correctly. Neutral (middle) = no prop spin. Forward = Prop turns when on idle; but as you build the revs the prop will spin faster but doesn't feel like there's any propulsion of the boat in the water. Only when we get to quite high revs does the propulsion 'kick-in' and you feel the effect and see the wash. In reverse (ad idle) the prop 'creeps' round very very slowly; until revs are flat out and it snaps into drive (that cant be doing the engine / transmission any good at all !) I cant think of anything else to try, so resigning myself to an engineer looking at it.
    Just out of interest, what type of prop do you have? I had a sort of similar problem last year, high revs, boat going slow. Luckily it was a plastic bag around the prop.

  10. #10
    Join Date
    Sep 2018
    Posts
    8

    Default Re: Volvo Engineer needed !

    I put the go-pro down to take a look, and as far as I can see the prop all looks good. Great suggestions from everyone though. Really appreciate all the replies !

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