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Old 24 October 2009, 13:28   #11
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impeller

Latest update :

Went to Bristol Boats this morning and bought a new impellor.

The diagram above is not the same as my engine, so I asked the engineer at the boat shop. I was told to remove 3 bolts, 2 from under the cavitation plate, and one on the transom side of the engine, above the cavitation plate.

This I have done, but still cannot remove the bottom end. I took someones advice and used a block of wood and a hammer on the prop housing, but still it will not move.
I inserted a screwdriver in the gap as a wedge, but only succeeded in breaking off a small part of the casing.

Any other sugestions please ?
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Old 24 October 2009, 17:52   #12
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Quote:
Originally Posted by redxpuser View Post
Latest update :

Went to Bristol Boats this morning and bought a new impellor.

The diagram above is not the same as my engine, so I asked the engineer at the boat shop. I was told to remove 3 bolts, 2 from under the cavitation plate, and one on the transom side of the engine, above the cavitation plate.

This I have done, but still cannot remove the bottom end. I took someones advice and used a block of wood and a hammer on the prop housing, but still it will not move.
I inserted a screwdriver in the gap as a wedge, but only succeeded in breaking off a small part of the casing.

Any other sugestions please ?

Pay an engineer or buy another engine mate.

No insult intended here-if you couldn't figure out which bolts/nuts to undo from that last post of mine you don't have the necessary skills to work on an engine that you'll be relying on to get you back to shore.
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Old 25 October 2009, 04:03   #13
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impellor

Well thanks a lot,
your last post would have been really helpful IF it was anything like the engine I have. As it was Nothing like my set up, I didn't find it very useful. You say I haven't the skills needed, that's why I was asking for help in the first place.
As you are only in Swindon, maybe you could recommend an engineer who could take a look at it ?
Otherwise, one scrap engine !
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Old 25 October 2009, 05:35   #14
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Who are Bristol Boats ? D'you mean Force 4, or am I missing out on potential shopping opportunities ??

Anyway, back to the point, if they are unable to help you could try Samspeed who are near-ish (on the A38 towards Gloucester). I've heard both good and bad things about them, and they have a tendency to be expensive, but could be worth a go. I'll send you a PM with their number as I don't know if I'm allowed to post it.

(BTW, I haven't tried taking my engine apart yet but can see myself ending up in a similar situation before long, so hope you get it sorted without too much expense!)
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Old 25 October 2009, 05:44   #15
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Look, it really wasn't an insult. Note what I said at the beginning of the post:-
Quote:
Originally Posted by me
The pic is of an Opti lower unit. You may have a different number of bolts/nuts, but the principle is the same for all Mercs.
From what you've said you simply don't have the general mechanical knowledge to be working on something you're going to be relying on to get you back to a place of safety. It simply needs building up on something less critical to your survival.
There's no shame in it-if I tried to do your job I'd just make an expensive pile of firewood.


Anyway, back to the point.


If you want a recommendation or a good engineer,it's a bit of a trek but try Mike at Redline Outboards in Abingdon. If he can't remove it, no-one can.
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Old 25 October 2009, 05:53   #16
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Quote:
Originally Posted by Shaz View Post
Who are Bristol Boats ? D'you mean Force 4, or am I missing out on potential shopping opportunities ??

Anyway, back to the point, if they are unable to help you could try Samspeed who are near-ish (on the A38 towards Gloucester). I've heard both good and bad things about them, and they have a tendency to be expensive, but could be worth a go. I'll send you a PM with their number as I don't know if I'm allowed to post it.

(BTW, I haven't tried taking my engine apart yet but can see myself ending up in a similar situation before long, so hope you get it sorted without too much expense!)
They are actually the guys I was telling you that'd have spares for your engine but I couldn't remember their name Google them.

You're less likely to have the lower unit stick-your engine is 15 years newer.
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Old 25 October 2009, 11:05   #17
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Quote:
Originally Posted by Nos4r2 View Post
They are actually the guys I was telling you that'd have spares for your engine but I couldn't remember their name Google them.

You're less likely to have the lower unit stick-your engine is 15 years newer.
Ah brilliant - will have a look.

Nope, mine didn't stick, had forgotten it's American so normal metric sized tools no use, and every bolt appeared to be a different size, but other that I think it's done. Thank you for instructions, very useful ! I was hoping for live online support, but unfortunately our wireless doesn't reach over the road so I had to rely on the diagram. It's not the same, but similar enough to make sense. :-)

However, I can't test it cos I've got a broken bit of pipe which looks like it may be important - hopefully it will show up in the photo - the end appears to have sort of corroded and broken off something but I can't see anything obvious that it was attached to. Does it go inside a metal pipe or is there another plastic/rubber bit that it should clip to ?
Also is there a name for it so I can Google for instructions on what to do with it ?
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Old 25 October 2009, 14:04   #18
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Is it copper or plastic? I think I can see 2 bits of pipe in the pic. Hopefully it's not your water pickup tube.
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Old 25 October 2009, 15:38   #19
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It's plastic. I thought it probably was something to do with water pickup but it looks really small for that - it's only about 1mm internal diameter.

I spoke too soon about everything else being a success, I can't get the lower unit back on ! After much wiggling it will go as far as allowing the bolts to just about locate, but it won't lift any further and I don't want to try doing them up tight as it wasn't that much of a struggle taking it off, and I don't want to break whatever is in the way.

It's going to have to wait til next weekend now so plenty of time to identify random plastic bits and what to do with them.
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Old 25 October 2009, 18:29   #20
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Has the water pickup tube located in the pump housing?
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