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Old 14 July 2008, 05:44   #1
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Please Help Needed Yamaha 55!!!

Hello

I am after a yamaha 55 2 cylinder 2 stroke gear box or whole engine if needs be!!!
My gear box is buggered the pin that selects gears has dropped out or something and i do not know what to do or how to fix it, i have been told the only well to fix it would be to cut it open!!!

Please help, if you know anything or of anyone
please message me on this!!!

Thanks
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Old 14 July 2008, 06:37   #2
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How much have you been quoted to rebuild the gearbox? it might be better to find another engine depending on the condition of the rest of the outboard but the 55s are getting long in the tooth now. Keep an eye on Boats and Outboards and e bay, but tread carefully with old engines.

One final possibility is a Mariner 55 gearbox might fit but you would need to check by fitting it before buying it.

Pete
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Old 14 July 2008, 07:04   #3
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I thought you had one already with a knackered head.....or was it the gearbox that was knackered on it?

Anyway, cutting it open sounds a tad extreme for a lost pin. Can you be a bit more specific or chuck a pic or two at the thread so we can figure out what's wrong?


Did you manage to get the elecrics connected up?
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Old 14 July 2008, 17:40   #4
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Bill Higham marine has a Mariner 55 (long shaft) for 1100. There are one or two Yamaha 55s on Ebay - unfortunately they're mated to a Fletcher or similar. Hell - still an option though if you want a cheap engine for a 1k.

You'll struggle to find just a working gear-box, especially if you want it soon, otherwise you'll be trawling all the sites looking for a compatible part.

Might be worth cutting your losses and looking to renew? I'd get a quote for the gear-box first. Might be the clutch-dog assembly. No idea how difficult it is to repair.
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Old 15 July 2008, 04:49   #5
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hey spartacus thanks for the idea i have been thinking of selling the engines an cutting my losses for a while but i have been looking around and there arent any engines at the moment that i want!

In terms of gear box rebuilds!? do i just phone up a mechanic an say how much or??

thanks
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Old 15 July 2008, 05:36   #6
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Quote:
Originally Posted by EllWilcox View Post

In terms of gear box rebuilds!? do i just phone up a mechanic an say how much or??

thanks
Unfortunately not-on an old box you'll be very lucky to get a one off price that (most importantly) he can stick to. It's all dependant on what he finds when it comes apart and how many parts actually need replacing.
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Old 15 July 2008, 06:04   #7
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Originally Posted by EllWilcox View Post
.... i have been thinking of selling the engines ....
How many do you have? Also what's wrong with them?

I pulled the Mariner 55 microfiche form Ishopmarine (all my repairs have been done using the Clymer Mariner book - they are the same engine bar the paint job!) There isn't a huge amount of mechanism to go wrong down there.

What doesn't it do? Does it just not select, is it stuck in one gear, is it just stuck? does it jump out & rattle a lot when you open the throttle in one or both directions? It may just need an adjustment to the mechanism up at the top or your remote cable end fitting!

If you have >1 engine (memory says you have a siezed one?) I bet there will be enough bits between them to get a decent 'box out the pile of bits.

Oh, and probably best not to phone the "cut it open" adviser for a quote!
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Old 15 July 2008, 11:11   #8
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hey basically i have one engine that is completely seized which i thought had a ok gear box which it does not! The second engine is great it runs. I bought that engine thinking that i had a ok gear box which i foun out was seized. So the newer engine that runs came with a gear box detached which i knew had something wrong with it. The guy who sold me the good top half engine gave me the gear box as well. He said all of that gear box is ok except the pin!? or something that selects the gears, the bit directly down from the prop inside the casing has dropped of inside the somewhere. He said if worse comes to worse i could potentially cut it out fix that bit put back together and it should be fine.

Or he said if i could get all the bits out of the other gearbox off the seized engine that is with the seized gear box as well, then i could potentially just swap them round but i am not too sure how to do any of this or what to do next!!!! Thats my problem now!!! If any of you could help please please let me know i want it fixed!! haha!!

The thing is Yes i could cut my losses but i have looked up and down the blood internet for months now and nothing has come up!!!

Again thanks for all help and as you can see i still need it!!!
Any suggestions would be amazing!!!
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Old 15 July 2008, 13:29   #9
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Hey guys i have some photos of the two gear boxes the seized one is labeled A and the other is B.

Bascially you can kind of hopefully see the position i am in etc!!!
The gearbox B you can see the cut where the last guy fixed it but the pin fell out i know it looks a bit sketchy but dont worry its all ok, this gear box is good except that problem with the pin or something - i have taken a few shots down in to the gear box where the guy told me you can see where something i.e the pin has dropped out but i did not know what i was looking for hopefully you do!!! Basically have a look let me know hope this helps!!! Oh and the guy who sold me the good engine with the gear box B that i am trying to fixed i am in contact with him he is a nice guy and he thinks i could cut it open again an sort it out, but any way let me know stuff!!!

Thanks again for the help!!!
Oh and if i do cut it open luckly enough my girl friends dad is an amazing welder so i should have no problems fixing the cut bit back on!!!

Ok let me know!!!
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Old 15 July 2008, 13:33   #10
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More photos!!!
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Old 15 July 2008, 13:41   #11
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more photos!!!
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Old 15 July 2008, 19:47   #12
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The casing on B looks trashed-I'll be surprised if you can get it apart without cutting it apart. Best to get a manual and dismantle both g/boxes then make one good one. Use the casing from A.
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Old 16 July 2008, 03:33   #13
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Casing A is completely seized its almost like welded with salt water i have no idea how to get the bits out?? the shaft pole is just like completely locked into the casing!! The like weird shaped bits on the seized pole sitting in top of the casing i think that holds the impellar and also hides/covers a bearing type thing is stuck inside the top bit.

Basically the guy i got the engine off said to do the same thing. So i had a go at taking the bits out and if you look at the 2nd photo out of all of them, the yellow type bit lifts off and the other stuff but the like metal same shaped thing as the yellow one as like welded with salt water on so i had ago at lifting it off and snap bits of so i am left with like a circle like bit of that covering the bearing thing if you get what i mean??

Shall i just smash the rest of what is left with a chizzle because it is seized anyway?? or, because so i can get the pole out or??

Also if i do get that out do you think i will be able to use the bit next to the pole from that gear box that selects the gears?? or??

Thanks

I will put up a picture of the position i am in, I know what i did with lifting that bit up sounds stupid and it snapped but i was in the mood where i wanted to fix it, because it has just got to that stage an it may of gone a bit wrong but i think it would of happened to anybody really.

Thanks
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Old 16 July 2008, 06:04   #14
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Here is some more pics, gear box A you can see what i mean by the snapped bit and also how i get all the parts out i do not know??

Gearbox B i have photographed the bits on that which are not stuck like gear box A also i have taken a pic of what looks like a bearing, any ideas of how to get that an the pole etc... out...

Do i need a service manual an where can i get one??
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Old 16 July 2008, 06:06   #15
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Photos from message above ---
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Old 16 July 2008, 06:07   #16
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and a few more ---
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Old 16 July 2008, 06:17   #17
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Eli.Sorry to be blunt (and I apologise to everyone else here for my language but)

BUY A FUCKING MANUAL.

You don't have a hope in hell of fixing it without. You may have already trashed it to the point of not being able to fix it at all. The driveshaft WONT COME OUT like that-it's got a gear BOLTED on the end of it.

You have a PM.
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Old 16 July 2008, 06:30   #18
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Elliot,
I'll second Nos on the "B" casing comments - the bit that's welded holds the bearing housing in place! When you say the "A" case is siezed, do you mean the prop / shaft don't turn, or you just can't break into them?

The funny shaped thing round the long shaft is your water pump housing. The metal funny shaped thing in front of it is what holds the bottom of your gearshift rod & mechanism in place.

Here's a pretty pic of what's inside:

http://www.ishopmarine.com/ishop/sec/partlists/
Choose "Mariner" - then you get a list of every mariner ever made, scroll down & choose "55", pick any random chassis number & look at "gearcase". The "straght in" address link is too long to paste here! The prices are in Dollars, but they are also conveniently roughly what your local Yam dealer will charge you in .

If it's the pin I think may be missing, you'll probably need to pull the prop shaft out to get it back in.

Now, if the thing is siezed shut with salt, what to do is find a big bucket of warm water (cold will also work, but warm will dissolve the salt a lot faster), and steep it for a bit. Tap the bolt heads sharply with a small hammer as well before you try to undo them, that may help to release the salt bond in the threads. worth repeating the above steps a few times before trying to undo anything, otherwise you'll need to go buy a set of stud extractors! If you take the plastic wings off you might get it in a standard plastic kitchen bin.

I'm going by memory here, but is there not (behind the prop) a couple of screws to hold the bearing housing in place? (I may be thinking of my old Suz here) Undoing them should release the shaft assembly as shown on the link digram. If not, any chance of a close-up pic (i'm nowhere near mine 'till the weekend)

If you need a hammer to get anything out just replace the bearings as a matter of course - ball & roller bearings don't like impacts! Also replace ALL the seals - once unseated you'll be bl**dly lucky if they re-seal properly.
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Old 16 July 2008, 10:49   #19
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Do i need a service manual an where can i get one??
Google "Clymer" - if you can't find a Yam one, for the purposes of this experiment the Mariner one that covers mid 70s/ early 80s will do -the Mariner 55 was a resprayed Yam.

Actual Yamaha info is quite difficult to find for stuff pre about 2002.

PS also noticed form the second set of pics you appear to be missing the trim tab anodes too. Probably explains a chunk of the corroded mess in there (unless you removed it yourself?)
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Old 15 August 2008, 08:31   #20
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How's this project going? Any success dismantling either of them?
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