Can you re-engine a 24ft boat to diesel on a budget?

wofforduk

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Well, Yes!

For anyone who has the techie ability to do so, a winter with some time and some good fortune!

First off, I wanted a boat that I could sleep on, with a realistic budget of 5.5k. After some looking around, I found one at a local marina (not bad for the middle of the UK...) at a well overpriced 13k, with the petrol 5l v8, where the owner had left her for some time.
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It was a bit of a state, with some 'interesting' vinyl up the side, but it came with a trailer and loads of bits and so was happy to go for it. Unfortunately she was on the hard, and so i couldn't hear the engines run. Bearing this in mind, I thought id have a punt at it, and offered them 5k. They accepted.

Upon bringing her home I was eager to find out what state the v8 was in, not hoping for the best. With some fresh batteries in, I hit the start key.

Nothing. seized rock solid. Okay so, plugs out, oil in - to find one of they cylinders was full of crud.. like, nothing I have seen before.
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The Spark plug port on the left was full.

Okay, so I had an issue. Engine out, heads off.

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Still not sure what the heck this stuff was, but it had a good go at eating that piston. Great. So, after sourcing some used but good pistons (amazingly hard to do...) We were back on track, and a week later was in Dartmouth on holiday, where she didn't want to start all that well as the timing wasnt right, or had no real power. We managed a flat out speed of 16knts. yay.. (with an obviously blowing head gasket due to the rebuild being a tad rushed :ambivalence: )


So. Winter came. perfect time to have a re-think. I had chosen the Yanmar 4LHA - STP, as the 240hp rating for the size of the motor seemed pretty perfect. Im guessing normal people at this point throw it at a marina to fit a new one, and get the chequebook out. But normal is boring and mine would have bounced off into the distance with just the sight of a 'mechanic'.

So, where the heck would i find one of these engines, since their like rocking horse poo.. After searching, there was one on a 'certain boat sales website'. perfect, after lots of emails, with pictures of the engine ect, i was happy. paid the man over email, all was well. Or so i thought. Typical, turned out to be a scam, and after 3 months got my money back. Phew...

But anyway, I put a call out on this forum, trying to find one. No-one had anything in my budget, except.. I received a PM from a great guy selling a commercial boat, with two engines that he wanted to sell all together, so after a trip to Isle of Wight, I was a proud owner of a fleet!

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The neighbours did laugh a 'little' when they saw this monster 30ft long 9ft wide bright orange 'thing' coming down our tiny lanes, and even more so at how we removed it from the lorry...!
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Anyway, I had two engines. Keeping the one for myself, I sold the other, which nearly paid for the whole purchase of the orange boat! Then went to work, stripping the orange boat's jet drives off, and finally selling the hull for a whopping £50.

So with this in mind, I needed an outdrive that could take the power. Now, once again, back to the internet where I found one for a good price, with little use and good condition. This wasnt a hard process, and with a bit more help from people from this forum (cheers again!!) had all the bits and bobs to put that side together, selling the old alpha one too.

Now came the hard part. As the Engines had got jet drives powered through gearboxes, I hadnt got the bell housing, couplers or exhaust horn that you need. No-one had any second had, and was getting quotes of around 7,000 for the parts through dealers. I was extremely shocked...

So. change of plan - make my own.

Using the bell housing from the V8 i had, I cheated a bit, and used an external guy to get this made up. Honestly, his work is phenomenal, and reasonable too. PM me for his details.. anyway, here is his handy work on both the housing and spacing ring that was needed to couple my drive up
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everything mated up perfectly.

So, now had to fit the thing in the engine bay. perfect time to get the steam cleaner in there!
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After she was clean, i did all the stuff that would have been a real ball ache with a lump of engine there.

The electrics were all pre wired, for the engine and charging system. (Can you tell which company I work for from this one below yet?? ;) )
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Now, i had a problem that i hadnt got a power steering pump on the engine block. Once again, with a bit of googling, I came across a Citroen Saxo electric pump, £15 of ebay. Fitted that and it actually works (yeah, wasnt expecting it too really) so now had power steering.

For the exhaust, i used a V8 one, which i modified extensively to be a single outlet but with a pressure release for the exiting raw water on the other side.
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Now was the hard part, dropping this engine in... It wasnt going to be an easy job..

But after a lot of sweating and swearing, it finaly went in.. Phew!

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Treated her to new dash boards and switches as the old ones were, well, old.

Found some brand new old stock Props for a very good deal, which was worked out to hopefully be the right pitch for what i needed, they fitted a treat.

thought I would try it in a lake, with toolbox ready, so i could fix the leaks should they occur. They did. but anyway, what good boat doesnt have its leaks ;)


So tightened them up, and was looking good. Temp gauge was not working, and, using a infrared heat gun , i assertained that it was not cooling well and was getting to 95deg, so by taping up the water inlets on the leg, i filled up the raw water system and found a big leak above water level, sucking air in.

Right then, problem cured I hope, but ordered in the correct temp sender from the states, as i was using the US spec gauges with a EU spec sender.

Now for the fun part, the sea!

With the parents boat not too far, and lifejackets firmly worn, we ventured out!

Unfortunately I have exceeded my 'quota' to upload any more pics, so here is a (noisy) link to a very happy owner, cruising at 25knts just outside of dartmouth, with a steady temperature of 65deg (even when flat out)

Now, for some techy details on pricing, trying to include as much as i can remember!

24ft cruiser -5,000
v8 engine (selling) +450
Alpha 1 leg (selling) +640
Bravo 3x outdrive -1,200
Custom made housing + spacer -800
Transom mount -300
Work boat (after transport) -6,000
Yanmar engine (selling spare) +4200
Jet drives (selling spare) +2400
Gearboxes (selling spare) +500


Obviously there were other bits to buy in, like exhaust tubes, water pipes, dash board, so realistically, that was probably around £400 expenditure.

this roughly works out for the whole boat actually costing around 5.1k. not bad for a diesel trailer cruiser?


So yes, I have had bad luck, and good luck. but to anyone who says you cant economically convert an old boat to a diesel, well, yes you can, if you are prepared to think out the box a little.


Happy Cruising, and if you see me sinking, a few miles off dartmouth, bring a camera! ;)
 
Thankyou all! already had lots of fun, but more to be had hopefully! Yes thanks Scarron, was perfect! its only been possible with people like yourselves to make it all work, the ability of this forum still amazes me! :)

By no means was my install a show room, sparky, everything made out of gold type, but i don't think that matters, its the enjoyment of it that counts!
 
Hats off to you, what a great job. Will look out for you in Dartmouth, is your parents boat also based there, if so, what's she called?
 
Thank you!

Remembering back when i took this project on, there are so many worries about how it will go, but theres always a solution! :)

Thanks Tico, Ill let you know! the saxo pump does a good job, but cant quite keep up with very fast steering lock to lock! but going to just enjoy it for the summer, and make any alterations this next winter if it goes okay.

Longjohnsilver - only me in dartmouth, rents are posted in portsmouth but by all means give me a yelling at if i go past! :)
 
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