outboard anti-cavitation plate

gasdave

gasdave

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So it was a Happy New Year until....

....I went to have a look at my 8 year old Suzuki 2.5 and discovered a large chunk of my anti-cavitation plate had fractured off. No idea when/how! :( :confused:
So questions I hope my friends on here can help with are:-
1. will this affect the engine's performance in any significant way? It's only used to power a 2.7m inflatable tender - not heavy use at all.
2. is there a risk of reduced cooling water intake due to increased cavitation - more important than question 1 perhaps?
3. does anyone know what would be required to replace the part? It looks like the entire bottom end of the leg, below the plate, would need to be replaced. How much might that cost?

Once again, many thanks in anticipation. And Happy New Year to all of you :D
 
gasdave said:
View attachment 55299

So it was a Happy New Year until....

....I went to have a look at my 8 year old Suzuki 2.5 and discovered a large chunk of my anti-cavitation plate had fractured off. No idea when/how! :( :confused:
So questions I hope my friends on here can help with are:-
1. will this affect the engine's performance in any significant way? It's only used to power a 2.7m inflatable tender - not heavy use at all.
2. is there a risk of reduced cooling water intake due to increased cavitation - more important than question 1 perhaps?
3. does anyone know what would be required to replace the part? It looks like the entire bottom end of the leg, below the plate, would need to be replaced. How much might that cost?

Once again, many thanks in anticipation. And Happy New Year to all of you :D
Click to expand...

Might impinge on something high powered. Can't see a problem on a 2.5 tender engine.
 
Doubt that you would notice the missing chunk in use. Certainly it will not effect the cooling. Fixing it would entail stripping the lower unit off and removing all the internal bits before having an extra bit welded on. New bit would be more than your O/B is worth.
The cooling water enters before that area, so 'extra' cavitation would not have much effect, even it was noticable.
For pushing your tender, just do it.

Edit: Thick fingers made me miss NR's post
 
gasdave said:
View attachment 55299

So it was a Happy New Year until....

....I went to have a look at my 8 year old Suzuki 2.5 and discovered a large chunk of my anti-cavitation plate had fractured off. No idea when/how! :( :confused:
So questions I hope my friends on here can help with are:-
1. will this affect the engine's performance in any significant way? It's only used to power a 2.7m inflatable tender - not heavy use at all.
2. is there a risk of reduced cooling water intake due to increased cavitation - more important than question 1 perhaps?
3. does anyone know what would be required to replace the part? It looks like the entire bottom end of the leg, below the plate, would need to be replaced. How much might that cost?

Once again, many thanks in anticipation. And Happy New Year to all of you :D
Click to expand...

Yes ... the plate is part of the lower gear case .... part no. 55110-97J50-0EP

£400 here http://www.iboats.com/Case-Gear-Black/dm/view_id.1303001 but you might find it cheaper to just buy a new engine!!!!!!! :(

On the other hand it will work fine without it as others have said.

Richard

Drat ... it's one of those stupid websites which don't link to the actual item. Never mind, just search for the part number!
 
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I doubt it will make any difference on a non-planing boat. If you are concerned and don't want to go to the trouble of stripping the engine, you could always fabricate a new section from sheet aluminium and bolt it to the remains of the original plate.

PS: I'm being picky I know but it's actually an anti-ventilation plate. Cavitation is different.

Good luck

Darren
 
Look at it as an asset. Paint a bright yellow arrow pointing at the damage to discourage any lightfingered barsteward.
 
I had the same problem on a similar engine, but with a slightly larger lump of plate missing. I read a review in one of the mobi mags of one of those liquid metal type products. They had stuck a whole half of cavitation plate back on with it and reported that I t was still fine some time later. I have tried it and so far so good. Having said that if made zero difference to the engine performance on a tender when the lump was missing.
 
You should be able to buy one of these second hand quite easily. The 2.5 Suzukis suffer with clutch issues and people usually just buy a complete second hand gearbox. Its just usually the internals that suffer so the gearbox casing should be ok. Its a simple job swapping internals
 
PS: I'm being picky I know but it's actually an anti-ventilation plate. Cavitation is different.

I had always known it as an anti- cavitation plate until I was corrected quite recently.

Good luck

Darren[/QUOTE]
 
You will find one on eBay, just keep looking, I brought a complete leg plus a cylinder head, for my Suziki 3.5 HP outboard for £30 each, just for spare parts. Will check my history, because the bloke I brought my parts from, is breaking engines all day long,also I brought a near new pull starter as well.
 
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