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Keltik's cast iron squirty thing


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23 hours ago, Muncie said:

I do romp on it quite often too.

You can't beat a jet unit for soaking up horsepower.

Could've been running straight magic 50w snake oil with extra children's tears and the old engine was still going to die.

I'll be running Total 10w40 semi synthetic again because it's the cheapest oil on tap at work.  Might add an oil temp gauge too for some extra eye candy on the dashboard.

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So after the last outing, I whipped off the RH exhaust and realised there was no amount of sealant that was going to fix this.

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Took it to the local engine shop and had them mill it flat.  The bow was to severe for them to sort out so I got it back with the recommendation to have someone else fix it.  So I did.

Build up the problem side with a skim of high temp JB weld.

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Make a ghetto surface plate out of some sandpaper glued to an old floor tile.

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Refitted everything and headed out to the lake with a bunch of spares and tools and a safety tow boat.

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Fixed the misfire in the first 2 minutes with no tools or spares required - one injector plug wasn't clicked in properly.

Had a good test run and got through half a tank of fuel.  It's got a lot more power than before and is a fair bit smoother!

One problem is that it seems to be pulling timing and losing power the longer you hold it at full throttle.  Coming back to quarter throttle for a few seconds feeds the timing back in then you can get on it again.  I think I can hear the knock, oil temps are cold and water temp never gets warm so it must either be a hot spot in one of the cylinders or a fuelling issue.

I think I can hear the rattle coming from both banks so the current plan is to change the fuel filter and go out for another run with a pressure gauge on it and the scan tool looking at live timing data.

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  • 1 month later...

Well bugger.  Have been taking on more water than I'd like lately.  Today's trip ripped off some more bathroom sealant and bog to reveal....

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Gonna need to remove the fuel tank to fix it properly.  Could this be the time to strip the whole hull and patch everything up nicely?  Or do I bodge it up for a few more trips?  

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  • 2 months later...

Well it's been 2 months of ignoring this thing in the shed and what do you know....it still isn't fixed.

3 trips as passenger in other people's boats has motivated me a little tho.

So it's time to flip the hull.  I pushed it off the trailer and naively thought I could just roll it over using muscle power with the misses holding my hernia in.  Turns out steel is heavy.  That's no way my shed could support a chainfall so I got out the trolley jack and a series of wooden props.

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  • 4 weeks later...

Welded on the new bits using the small amount of welding skills I possess.  Grinder n paint.

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Found a couple more surprise pinholes that got welded up.

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Then I decided to paint the hull again using a proper primer this time.

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None of this work is stuff I'm supremely proud of, but it's good enough.

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Next weekend once the paint has hardened, I'll flip the hull over, make some small modifications and paint the inside.

Hoping to put a proper firewall in and add a frame around the engine cover opening so it can bear weight, be walked on and get sealed better to keep the waves out.

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