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Superslooper

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Hi to all at the forum
I have a 26' wooden sloop strip plank built with mahogany on oak frame it was built in 1967 and I got it from an ebay auction. She had been sat in the corner of Martlake Yacht club on the south coast for about 10 years and I am in the process of repairing some bad wood here and there no problems with that at the moment but what I am starting to think about is the engine. It originally had a coventry victor marine petrol in but this is past its sell by date and parts are hard to come by so I am thinking diesel for better safety, economy etc. and am considering a yanmar 10hpish single does anyone have any advise or tips maybe??
/forums/images/graemlins/confused.gif
 
Welcome to the forum

Yanmar 1GM super little bit of kit. However, may be a bit underpowered. I have one which replaced a Stuart Turner because it was the only engine then available that would fit my space lengthwise. However a Beta Marine 2 cylinder either 10 or 13hp would now be my first choice. They are both the same size and little bigger than the Yanmar. Also freshwater cooled and available with wide range of accessories (mounts, gearboxes etc.) to fit your installation. Other similar makes in that size range are Vetus and Nanni.

Before you dive into the new engine market be aware that it is not cheap - you will almost certainly need new stern gear, fuel and exhaust system. You are looking at £4k. Rarely do good engines of this size come on the market, but worth looking out for as you can often get all the bits with it.

Hope this helps
 
Hi Supersloper. Welcome aboard. You will get plenty of help and good advise from here.
The thing peeps will appreciate is a photos if you can do them.
The yanmar 10hpish single is a good option they come up on ebay so it's worth a look there.
Cheers David.
 
I have a 10 year old 10hp Yanmar in Border Maid driving an offset prop and have found that perfectly adequate in terms of power. I imagine your boat will have similar characteristics to a Folkboat? Beta do get very good reports and being 2 cylinders should be smoother running. My Yanmar does dance around a bit at low revs but calms down a bit with a bit of throttle. A new engine is a big investment but does not seem to have a proportionate impact on the possible resale value of the boat so it is worth thinking about quite carefully.
 
Ahh good responces already nice one chaps, yes I guess two cylinders would be smoother but what about the weight? but I suppose as Im not racing... Yes Ken a folkboat would be a good comparison for size I suppose. She has a 12 cwt external lead keel and the stern tube is just behind in a central configuration and will be repacked. The prop is a 2 blade folding bronze saildrive jobbie. I regard myself as a fairly good mechanic/fitter as I served my time long ago on turbo prop aero engines. I will probably be looking at the good second hand deal market, and therefore will save a few sovs, and putting it in and what-have-you shouldnt raise too many difficulties. Just not really in the know when it comes to what make are gooduns and not, so Ill ask the experienced boat heads cuz thats the best advice there is snm...
I will get some pictures up as soon as I get a chance they are invaluable as otherwise we are all working blind
/forums/images/graemlins/smirk.gif cheers and dont get yer feet wet.. at least not with spilt ale
 
I deliberated (dithered) about engines on my boat - similar size. Sold off the old Yanmar 1GM cos of bore damage - boat engineer friend suggested i could put in a new piston and sell as a goer but conscience wouldn't allow. Also made decide against s/h engines as an unknown quantity. I seriously considered Beta ; more power and less weight and vibration. In the end chose a replacement Yanmar to "drop straight in ". It didn't though as the beds had rotted. If I'd known would have gone for Beta - good support thro steve birch of this forum. nanni use same engine and maybe have better fittings in places but not enough to swing it.
 
I installed a 1GM10 to replace a Stuart Turner in my Tamarisk 24. Decision was based on size i.e. nothing else would go in the original space without structural changes, and the fact that the Yanmar can be started by hand where the Beta etc cannot. I only have one battery in the boat so this is handy for a "just in case"

Power is ample and the Tamarisk weighs in a just under 3 tons , hull speed is reached at about 2/3 throttle in reasonably smooth conditions. I don't think I would gain anything with more power and the Yanmars are it seems the only engines of this kind of size actually designed as marine engines, the alternatives are conversions of other types. They certainly bounce around a bit at low revs but this has not been a problem and all in all I would say a super little engine.
 
[ QUOTE ]
....... the Yanmar can be started by hand .....

[/ QUOTE ]
Mine has a starting handle and a thing on the front to connect that to, but I have never successfully started mine by hand. Have you?
 
I have started mine by hand quite easily! The one time that I needed to start it by hand was as we approached Glenarm in a big wind and sea. The boat was bouncing about too much for me to get the right position and I failed miserably so we sailed in. Whilst moored on a pontoon I can start it quite easily though.
 
A good tip to starting by hand is.
Before you flatten your battery by continued trying.
Insert the handle and give it some help you will 99 times out of a 100 do it easily. /forums/images/graemlins/cool.gif
Remember to keep your thumb in the right place. /forums/images/graemlins/blush.gif
Just like anything else try it out and practise for when you need to in dire straits do it while mored up safely and you will get it right first time when you really need to. /forums/images/graemlins/smile.gif
 
The more I hear about the little yanmar the more I like the idea another little engine I have seen is the bukh I think I am spelling that right but the look a bit more expencive. I will be looking at a few beta specs over the next couple of days and check those out.
Also I suppose with the credit crunch there may be a few deals around as sales of any products are becoming more difficult all the time I should imagine a bit of bartering could pay off???
 
Yes the wonders of ebay I love it its a horders paradise oops am I giving something away there...
One thing I notice the Yanmar is air cooled anybody had any trouble with over heating in an engine compartment I suppose a small fan and a bit of ducting would quickly resolve that though?
 
[ QUOTE ]

One thing I notice the Yanmar is air cooled ....

[/ QUOTE ] The particular one on ebay is but the 1GM10 is cooled by seawater so requires a water intake and strainer etc. I have come across small aircooled marine diesels, they just require adequate ventilation.
 
That shoudnt be too much trouble as the Coventry Victor engine was also a sea water cooled so all the necessary holes are all in place and I may be able to use some of the old pipe work
 
Yes I have started by hand. As others have now said it is certainly a good idea to get the "knack" before you need to as you certainly won't acquire it when in extremis!

WIth a bit of practise the 1GM10 is easy. The difficlut part to master is the ability to let off the decompressor while still winding hard as the natural thing is to stop just as you try to compress the engine which is rarely successful.

I have also with huge difficulty managed to start a two pot Yanmar by hand but you really need to keep several tame gorillas around to ensure success with the bigger engines.
 
As an aside, starting Lister air cooled 16hp. OK by hand, just need to judge the point when you let off the decompressor. On one cylinder first, then the other. Tried it on a 4 pot 45hp with no decompressors ( 3 peps on the handle) not a hope.
A
 
Not quite. I have the power curves in front of me. The 1GM10 has a maximum of 8hp at 3400 on the DIN 6270A and 9hp at 3600 on DIN 6270B.

However the point that 10hp overstates is well made. Common to most engines where the headline HP is often 10% higher than the actual (generous) output. On the other hand at normal cruising revs, say 2800 it is only producing about 6.7 - one of the reasons why it is so frugal in actual use.

Having a Beta 13 which is virtually the same size physically and only about 15kg heavier gives well over 50% more usable power across the range, which is why I wish it had been available 17 years ago when I fitted my Yanmar!
 
I have been checking out the beta and that seems to be winning my effections over now, shame you cant hand start them though. Has anyone had to do any work on them? I was reading a report by a guy in Oz who was attempting to rebuild a Bukh and he seems to be saying its a bit of a nightmare and over complicated, would this ring true of the beta??
 
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