Terminal 1gm10

[Laundryman]

1gm10 now removed from boat and found to need crank, big ends, exhaust valve,rings and exhaust elbow. In other words its knackered. This time last year I fitted a new 15hp mariner with electric start/remotes etc and have used this solely ever since without any problem. I now have to make a decision, what to do about the inboard? Replace the yanmar with new at £3000?
Replace the yanmar with a new beta at £3000?
Ignore the advice that an inboard is better and continue with the Mariner and make good use of the space. The boat is only worth £5k, what would you do?

 

[sailorman]

buy a boat with a new Yanmar 1GM fitted in it /forums/images/graemlins/ooo.gif
& swap it over

 

[Georgio]

Depends if you plan to keep the boat.

If keeping it for some time, buy and fit a Beta

If you plan to change the boat - stick with the OB.

done.

 

[Spyro]

If you are happy with the 15hp Mariner and you can charge electrics off it why not stick with it. Amount of extra fuel you would be using would not make that much difference. Think of the extra locker space you now have. Would the boat be worth £8K with a new engine?

 

[alexrunic]

if i was going to keep the boat i would fit a beta. i did last winter although took much longer than i expected i would fit one again on a future boat if i ever needed too. i have been very pleased with the new beta 14. the only thing that didn't fit was the drive shaft coupling the pcd was slightly different from memory.

 

[steve28]

sell it on ebay as "needs attention spares or repair " and get some funds for new one.

 

[Ceejay]

If that's all that's wrong with the IGM10 I would overhaul it. It sounds far from knackered. If the bores are ok, a new set of piston rings and bottom end overhaul would see it back in service for a good few years.
CJ

 

[ShipsWoofy]

Agreed, I would not right it off on the evidence so far. Unless I was as rich as the OP /forums/images/graemlins/grin.gif

 

[zlod]

I asked Beta at LIBS which engine they would recommend for my boat and they suggested a 1GM10, so I don't think I'm going to be splashing out on a Beta any time soon!

 

[graham]

If your happy with the outboard then carry on with it and enjoy the extra stowage space. I have an inflatable plus fenders where Banjos old engine used to lurk.

 

[tyce]

With the exception of the new crank these are just normal overhaul items.

 

[Norman_E]

Will it need a new crank, or can you get undersize bearing shells and have the crank re-ground? If so then an overhaul will be an economic option.

 

[charles_reed]

If the crank isn't to badly worn (you won't know till it's stripped and micrometered) and can be re-ground AND you can do all the stripping and assembly yourself, it will be more economic to rebuild than to purchase, cost of materials from Yanmar and machining will be about £1500. You will be able to purchase, at about 50% of the Yanmar price some of the parts, which will save some cash, but the major items like the oversize pistons can only be got from them.

The outboard is not really a serious auxiliary, especially when you need it desperately in rough seas and, of course, it won't be able to provide adequate charging facilities. However if you only use the boat for the occasional sail and don't intend to live on for any period the OB is a perfectly feasible alternative.

A replacement engine, fitted (and I would use a reputable company to fit it because of considerations of bearers and alignment) will cost around £3800.

I considered the same for a 2GM20 and replaced it with a 3YS20 Yanmar -mainly because the cost of rebuilding was nearly the same after you'd included a new gearbox assembly(very pricey).
If you want a detailed breakdown of all the things you have to do PM me and I'll dig out the details

 

[bendyone]

If you are going to keep the boat at least 5 years fit a new engine. You will have the comfort factor of knowing that it will work.

 

[DownWest]

If the crank can be reground, I see no problem in a rebuild.
Your asessment of bits sounds cheap. I have had several ones sorted in recent years. Beware of injection overhauls, could be expensive. Get some quotes. If you can do it your self, it sounds a no-brainer. For eventual resale, inboards are a definate plus.
A