Poorly outboard

[john_horsfall]

I have a Suzuki DT2 which keeps dying on me. There is very little water coming out of the 2 outlet holes which suggests a blockage and seizure. I have changed the impellor to no avail and pumped water into the inlet hole (it just dribbles out of the exhaust!!!)

When it dies the plug has water on it which suggests cylinder head gasket or could it just be water being sucked in from the exhaust?

All in all I should like to look under the head and maybe look at the water entry to the block. The head looks easy - is it? but I havn't a clue how to get at the rest of the water pipework. The obvious point of entry is to remove the gearbox or the bolts at the top of the shaft but am apprehensive of what I will find underneath.

Can anyone offer advice (apart from buying a workshop manual - its too late for that as I am off to foreign parts in a couple of days)

Thanks in advance
John

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[oilyrag]

If you can still turn the engine over immediately after it has died then it is not seizing. There is only supposed to be a dribble/fine spray coming from the 2 holes, not jets of water. Normally the most likely cause would be a fuel blockage or the breather. However, if there is water getting into the cylinder then it's probably corroded through from the water channels and is therefore scrap.
Bite the bullet and buy a Honda 2.


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[tcm]

Is it definitely water on the plug? If it is, it's scrap - but I bet that it dies, then you pull it a few times, then look at the plug which has petrol on it, perhaps? Have you tried a new plug? New fuel about 100-1, clean the filter and when it starts it needs a damn good thrashing. If there was water getting into the cylinger the heat would surely turn it into steam, or the thing woould hardly work losing pressure with bent head. There would have to be rather a lot of water in there before the plug got wet and the piston wd seize quickish. I think praps the carb might need a clean, and the thing is flooding the cylinder with fuel, so when you drop to low revs it dies through flooding with fuel, not water. Older style designs of carb had floats and if they are punctured the sink so fail to stop the fuel when the fuel chamber is full and continue to let fuel in. Or, the float stop up the fuel line from carb is gunkified and not seating to stop the fuel. There, a whole weekend ruined with pulling apart the outboard!

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[oldgit]

Re:try this if in the mood.

hi john,how old is o/b.the older the engine the more likely that the cooling channels have gunged up.the thing is fairly easy to strip and with care you can reuse undamaged gaskets.This outboard in known to clog up.Think that the matter was raised some time ago so a quick look at the search wotsit may be worth it.
In my o/b it was the waterways in the head/cylinder block that were totally blocked.How the thing ran at all without seizing was a mystery.Standard 10mm spanner seems to be main tool plus a cold beer,an hour or two and an old coathanger or pointy bit of wire.

<hr width=100% size=1>Two boats please one here n one in the Med

 

[john_horsfall]

Re:try this if in the mood.

Thanks everybody. As suggested the cooling channels were bunged up with salt.

I took the prop and impellor out and took the cylinder head off. I bodged up an old garden "killaspray" with some small bore pipe from a fish tank and was able to flush water both ways ie by injecting water into the 1/8" hole behind the impellor and also the other way into the small hole in the cylinder block. Very satisfying to see clean water emerge!

Bit of a struggle to get the gaskets.
International Marine Supplies in Gainsborough were brilliant getting them to me by return post.

Still cannot explain the water on the plug though. Maybe the head gasket was passing. Since I had to wreck it to get it off I will never know.

Never mind - Its off to the Channel Islands and Treguier on Saturday for me full of confidence that I won't have to row.

Thanks again

John

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