Submerged engine.

jack172 · 15 January 2015, 00:24

Hi all!

I've been offered an old Tohatsu 9.8 which is seized after being submerged for half an hour. It ran fine a few times following but has since seized. It is dirt cheap so I'll probably take a gamble but how easy would you say it is to fix? Or any tips on it?

Thanks,

Jack

Nos4r2 · 15 January 2015, 05:31

Expect scrap.

beerbelly · 15 January 2015, 06:19

it will need crank and pistons at least possibly the bores will be marked and as they will be plated an expensive job to repair. its just an anchor now walk away

Trimix · 15 January 2015, 10:19

You will need to completely dismantle it, soak it in oil, check there is no rust and re-assemble it.

That's the mechanical bits.

As for the electrics they may well now start to have rust problems - which will be much harder to sort / clean / eliminate.

uncle al · 15 January 2015, 11:44

if it was submerdged in sea water the electrics will not be trustworthy

beerbelly · 15 January 2015, 16:17

if it was submerged in sea water then ran until it seized it will need more than the electrics cleaning up .a friend had a 200 mercury on a speedboat that sank in freshwater they dried the motor out and tried to start it it ran for about two mins then nipped up scored all the pistons and bores and buggerd a couple of crank journals

jeffstevens763@g · 15 January 2015, 17:09

Hi jack if it is dirt cheep why not have a go you will get something from the strip down in terms of finding your way round an outboard,might be parts to salvage or you could be lucky!
We had a 5hp merc at work that had been for a swim no one new until we wanted to use it seized solid I took the head off soaked it in wd40 for a day or two then tapped the piston down with the shaft of a lump hammer till free emery papered the bore oiled up well cleaned the carb out put back together ran on a rich oil mix for an hour job done it's still in use today 10years later
You never know.

spartacus · 15 January 2015, 17:49

Would be an interesting project, but basically it's a strip bare job. As mentioned earlier, your wiring is goosed and will always be suspect.

Suzuki 9.9hp here: SUZUKI DT9.9 2 STROKE - Pre-Owned | www.penninemarine.com

jack172 · 15 January 2015, 18:14

Hi all!

When I say dirt cheap, I mean £30 but it's a very old Tohatsu so I'm not 100% sure as of yet.

jeffstevens763@g · 15 January 2015, 19:24

For £30 it's worth looking at it makes for an interesting weekend stripping it down

apshutt · 15 January 2015, 20:11

At 30 QUID!!! A lot of spare parts and technical skills for that price. The tiller would fetch that if someone needed one!

apshutt · 15 January 2015, 20:12

Quote:

Originally Posted by jeffstevens763@g

For £30 it's worth looking at it makes for an interesting weekend stripping it down

I agree totally

whisper · 15 January 2015, 20:14

Sell gearbox and strip it for experience

apshutt · 15 January 2015, 20:43

Quote:

Originally Posted by whisper

Sell gearbox and strip it for experience

Another few quid in yer pocket! !

whisper · 15 January 2015, 21:46

And when all the bolts snap practice getting them out too

beerbelly · 16 January 2015, 06:01

Quote:

Originally Posted by whisper

Sell gearbox and strip it for experience

agree didn't realise it was that cheep

Nos4r2 · 16 January 2015, 06:28

Yep, it's worth £30 of anyone's money

Nightfisher · 23 January 2015, 13:24

Assuming it's two-stroke: Possible the pin roller bearings, corroded, rusted and seized. Look'm up for that motor as they will all need to be replaced and will mean almost complete dismantle of the power head. Also check the lower unit to see that One: the prop turns by hand (in Neutral). Two: Open the filler screw and carefully watch the Lower Unit oil/lube runs out CLEAR and not muddy. Lower unit seizure is often more expensive than the powerhead re&re Bearings.