Does a yanmar 1gm10 fit in a Kings Cruiser 29?

DangerousPirate

DangerousPirate

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Hello,
I have found a very affordable boat in otherwise good condition, except the current engine is FUBAR. The current engine is a Volvo Penta MD1A.

Never refitted an engine so not sure if that would fit or not?

Also additionally - does anyone know how much it would costs to have someone do the work? Don't wanna risk a DIY but since I already (potentially) have an engine and the boat is really low cost this might be worth it.
 
1GM is physically the smallest engine on the market so will fit - however it is not appropriate for the boat unless you are happy with under 5 knots flat out. The boat needs 20hp to get hull speed comfortably, but if you are prepared to accept old style "auxiliary" performance then a Beta/Nanni 14 is physically very little bigger than Yanmar and streets ahead in power and refinement. However, better engines are rarely available used whereas there is a steady supply of used Yanmars given the vast numbers produced over the last 40 years plus the fact that owners tend to sell them to upgrade. Even with a good used Yanmar you are looking at £3.5k+ to re-engine DIY
 
Tranona said:
1GM is physically the smallest engine on the market so will fit - however it is not appropriate for the boat unless you are happy with under 5 knots flat out. The boat needs 20hp to get hull speed comfortably, but if you are prepared to accept old style "auxiliary" performance then a Beta/Nanni 14 is physically very little bigger than Yanmar and streets ahead in power and refinement. However, better engines are rarely available used whereas there is a steady supply of used Yanmars given the vast numbers produced over the last 40 years plus the fact that owners tend to sell them to upgrade. Even with a good used Yanmar you are looking at £3.5k+ to re-engine DIY
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Yeah, not looking to re engine DIY. Engine needs to be done proper and I don't trust myself.

Also I already have the yanmar, that's why I am asking. Otherwise I don't think it will be feasable tobuy a new engine.

Do you not think a 10hp is strong enough for this boat? I don't plan on motoring a lot. Just when I have to.
 
It's not really 10 horses either, more like ponies; 8 bhp is nearer the truth. You'll regret it longer than you'll regret the cost of a bigger(not necessarily new) engine.
 
There is one here with a Beta 16hp, so the photo goes some way to help you judge the space available:

Kings Cruiser 29 for sale UK, Kings Cruiser boats for sale, Kings Cruiser used boat sales, Kings Cruiser Sailing Yachts For Sale 1971 Kings Cruiser 29 - Apollo Duck

The boat's not in great condition but may assist you in making a decision about your prospective purchase.

10hp would push the boat fine, as long as you did not envisage powering into big winds and seas, and steaming home at 6 knots. More of a problem is the fitting of the engine because it does tend to get complicated with and old boat when you are watching the pennies. If you were DIYing it I would say crack on, but getting the thing fitted by an engineer could work out both frustrating and expensive.

As a minimum you have to look at the existing engine beds, the height of the gearbox output shaft on the existing and the new, the state of the exhaust gear and engine controls plus the fuel tank and fuel delivery set up. Plus the prop, it's shaft and stern gear. You generally find some, often a great deal, of this has to be changed or replaced with new.

.
 
DangerousPirate said:
Yeah, not looking to re engine DIY. Engine needs to be done proper and I don't trust myself.

Also I already have the yanmar, that's why I am asking. Otherwise I don't think it will be feasable tobuy a new engine.

Do you not think a 10hp is strong enough for this boat? I don't plan on motoring a lot. Just when I have to.
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As said it is not 10hp, but if the later 1GM10 it is maximum 9, but 8 at the prop. The boats design displacement is 3 tonnes and the original engine was rated at 18hp. I had a 1GM10 in a similar displacement boat and even with a 3:1 reduction and a 15" prop the best we could get was just over 5 knots. This went up to nearly 6 with a Nanni 14.

Budget at least £1500 for fitting and new bits, minimum new prop and exhaust system plus modified beds. Sort of OK if the boat is essentially free, but motoring will be really compromised!
 
Presumably this is the Kings Cruiser in Grimsby with the duff MD1A? I'm pretty sure that MD1As were the original fit; I looked at several back in the early 2000s and all had the original MD1A. By coincidence I looked (back then) at the one in Moray that Tranona has linked to and that had an MD1A at the time. Nice boats - I've a soft spot for them.
The engine box extends forward underneath the companionway so width is the only real constraint but I would think that there would be plenty of space for a 1GM10, although I agree that a more powerful engine would be better.
Pics of a couple of KC29 MD1A installations.

P1010002.JPG

.P1010029.JPG
 
Having swapped an MD1 for a VP 2003, I reckon most two cylinder engines would fit in the space. I had to do a fair bit of surgery to my boat, but only to make room for the third cylinder. That big ol' flywheel takes up a lot of space!
 
Hm. Maybe I need to find a different engine then, but still might be worth it. Is buying a used engine worth the hassle? Not sure about fit yet, but it seems like there are engines available.

Now I just need to figure out how much fitting the engine would cost.
 
Steve_N said:
Presumably this is the Kings Cruiser in Grimsby with the duff MD1A? I'm pretty sure that MD1As were the original fit; I looked at several back in the early 2000s and all had the original MD1A. By coincidence I looked (back then) at the one in Moray that Tranona has linked to and that had an MD1A at the time. Nice boats - I've a soft spot for them.
The engine box extends forward underneath the companionway so width is the only real constraint but I would think that there would be plenty of space for a 1GM10, although I agree that a more powerful engine would be better.
Pics of a couple of KC29 MD1A installations.

View attachment 128421

.View attachment 128420
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That's the one actually, I mean if you know the ad it seems like a decent offer. Everything done, except the engine out. I know I have to invest a bit but I am not sure if it's worth it or if I should look for something with a working engine in the budget, but then again: This boat has had some so much stuff that it might be worth it compared to other ones.

Dunno. Also the sound of a brand new engine makes me feel safe and happy. (I decided that I won't go with a too weak 1gm10 then, I just have that one in my current boat)
 
Certainly seems like a good price. The one in Moray with the Beta might look attractive price-wise but it's dog rough; he started out at £11k but is now down to £3k..
 
Steve_N said:
Certainly seems like a good price. The one in Moray with the Beta might look attractive price-wise but it's dog rough; he started out at £11k but is now down to £3k..
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That's quite a drop.... Do you have a link though? I don't find it.

And yeah, I was budgeting for 10k for a new one. But if i can get this one for 2k plus engine (what does a new engine cost me?) and installation (what does that cost me?) I would do it.
 
I bought a new Beta 14 in 2020 to replace the Yanmar1 GM10 in my Artekno H323 (displacement 2900 kg). I fitted it myself with help of a friend who is more mechanically minded than me. Fortunately I didn't have to change the shaft or the prop. The cost after selling the Yanmar worked out at £3650.
With the Yanmar I could get 6 knots flat out in calm conditions ,now with the Beta max speed in same conditions is 6.8 knots. The main benefit with 50 % more power is responsiveness under engine. Now when put in reverse the boat stops whereas before it was hard to stop forward motion when berthing. None the less the Yanmar 1 GM10 is a good engine and served me very well for 10 years.
 

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DangerousPirate said:
That's quite a drop.... Do you have a link though? I don't find it.

And yeah, I was budgeting for 10k for a new one. But if i can get this one for 2k plus engine (what does a new engine cost me?) and installation (what does that cost me?) I would do it.
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If going for a new engine then see if a Beta 20 will fit. The marginal cost over a 16 is relatively small, maybe £1k, so £6k instead of £5k fitted. There is a real shortage of engines at the moment, both new and used as I discovered when I went seriously buying back in November. Some new engines were quoted at April delivery and the large choice of used engines that were around earlier in the year when I first started looking at a project boat had gone. The 2 factors are of course connected.
 
Tranona said:
If going for a new engine then see if a Beta 20 will fit. The marginal cost over a 16 is relatively small, maybe £1k, so £6k instead of £5k fitted. There is a real shortage of engines at the moment, both new and used as I discovered when I went seriously buying back in November. Some new engines were quoted at April delivery and the large choice of used engines that were around earlier in the year when I first started looking at a project boat had gone. The 2 factors are of course connected.
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Okay, I didn't even notice that yet. Dam.

Maybe I just drop it and look for a different boat. I wasn't even looking, I just sort of stumbled upon it while doing something different.
 
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