If you wanted an Yanmar 1GM10 rebuilt who would you want to do it?

Firefly211 said:
I’m thinking of an engine rebuild on my 1GM10. I know there are lots of places who will rebuild it, but who would you recommend for a high quality job? It can go anywhere in the UK, happy to put it in the boot of the 4x4.

I suppose it’s a question of a rebuild verses a new engine?
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Can you get away with the engine as it is ?

Would be a bummer if you have to miss out a chunk of sailing this season.

It would then make a great winter project with perhaps some help along the way.
 
I'm, slightly bemused by the prices being quoted for a new engine. I've just taken delivery of a new Beta 38 with upgraded alternator etc etc and it was in the £6k region which is what people are suggesting for a Beta 10...?. I am assuming that the smaller engines come with a smaller price tag?

(The last time I bought a brand new 1GM10 it was just over £2k delivered... so maybe I'm out of date with Yammer prices...)
 
john_morris_uk said:
I'm, slightly bemused by the prices being quoted for a new engine. I've just taken delivery of a new Beta 38 with upgraded alternator etc etc and it was in the £6k region which is what people are suggesting for a Beta 10...?. I am assuming that the smaller engines come with a smaller price tag?

(The last time I bought a brand new 1GM10 it was just over £2k delivered... so maybe I'm out of date with Yammer prices...)
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Yes way out of date. don't know how you got your Beta 38 at that price (including VAT?) as I have just ordered a 30 with high rise exhaust and with delivery is £6700. Got quotes for Yanmar, Volvo, Nanni, Vetus, Sole and all +/- £6500. A 1GM is close to £4k.
 
Tranona said:
Yes way out of date. don't know how you got your Beta 38 at that price (including VAT?) as I have just ordered a 30 with high rise exhaust and with delivery is £6700. Got quotes for Yanmar, Volvo, Nanni, Vetus, Sole and all +/- £6500. A 1GM is close to £4k.
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It was between £6 and £7k and I ordered it at the boat show last year. High rise exhaust and 120A alternator as extras etc

A Yammer 1GM10 at £4k seems a bargain compared to some of the prices being bandied about for the rebuild parts...
 
The 1 gms also only 8 odd horse power.... So 10 is an upgrade!

The smaller engines are a bit cheaper but not massively so.
 
personal I’d go for home rebuild, a lovely easy engine to do.
full rebuild kit (eBay, 234359437231) Including complete piston, valves, seals and gaskets.
probably only need bore honed (cheap tool, or glaze buster).
the company will supply over size piston if rebore needed. Rebore should be about £80-£120 local engineering firm.
Crank unless showing marks and measures with tolerance just bearings (included in kit).
with engine on bench 8 hours, stripped, cleaned, prepped, rebuilt and painted. Even if crank needed grinding/polishing and valve seats cutting, excluding your labour the hole thing under 1k
Very satisfying
 
I‘ve been though this myself with my little 1GM10. When I bought my boat the engine way very sick, and I considered replacing it. A new 1GM10 is very expensive as is changing to another engine so I opted to have it rebuilt. It cost me around £1000 in parts and a weekend of fiddling with a friend to rebuilt it while still in the boat. I was amazed how simple the engine was, there’s really nothing to it. This was 10 years ago and it still starts on the button.

Every few years I consider buying a Beta 14hp but after totting up the price for the ancillaries and new propeller I always bottle it.

I do like my simple, lightweight 1GM10 and when it dies will replace with a refurbished one.
 
Gixer said:
I‘ve been though this myself with my little 1GM10. When I bought my boat the engine way very sick, and I considered replacing it. A new 1GM10 is very expensive as is changing to another engine so I opted to have it rebuilt. It cost me around £1000 in parts and a weekend of fiddling with a friend to rebuilt it while still in the boat. I was amazed how simple the engine was, there’s really nothing to it. This was 10 years ago and it still starts on the button.

Every few years I consider buying a Beta 14hp but after totting up the price for the ancillaries and new propeller I always bottle it.

I do like my simple, lightweight 1GM10 and when it dies will replace with a refurbished one.
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Hi Gixer, did you do anything to gearbox at the same time?
 
In Manchester a few years ago there was a business which advertised that they would recondition engines. Apparently they would buy engines from scrap yards where write-offs would end up, then use perfectly good (but second hand) pistons, oil pimps , cylinder heads etc, quick paint of light blue and fit the engine.
I nearly bought a Achilles 24 which had a 10 hp engine and I checked up on getting parts and a piston was unavailable.
I also had a boat with a 50 hp Thornycroft (BMC Diesel) and even though it was 45 years since I worked on BMC Diesels I thought that I could get parts, virtually impossible.
Personally I would rather buy a Chinese copy of the Kubota engine.
 
Firefly211 said:
I think I’m looking for as near as new as possible. Maybe a new engine is the best route.
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Hi Firefly.
Like others, I'd recommend doing the dismantling and reassembly yourself. The saving on labour cost resulting from DIY means refurbishing is hugely more economical than buying a new replacement engine. Little engines like this are not complicated. Once it is apart it will be possible for you or a professional adviser to assess what is worn and what to replace. Pleasure boat engines rarely do enough hours for the mechanical innards to wear out quickly. Inadequate maintenance is often the main cause of problems. Ancillaries like water pump, alternator and starter frequently give up before the engine itself.
While it is all accesssible, I would suggest replacement of the gearbox thrust bearing and oil seals. Any local engineering supplies firm will be able to sell you like for like replacements of those at much less cost than the engine manufacturers versions. Also have a good look at the gearchange mechanism inside the gearbox. That may have worn excesssively due to unsympathetically rapid ahead / astern changes.
The alternator and starter might only need a good clean of their insides, together with new bearings and brushes. If you do need to replace them, I have had good service from the Alternator and Starter motor company in Plymouth:

KUBOTA 12V 40 AMP ALTERNATOR fits: VARIOUS D V F B SERIES KUBOTA | eBay

You enquired about firms that might be able to do repairs for you. I would ask local independent garages, agricultural engineers, and motorbike repairers who they would go to for engineering services local to you. (Best not wear suit and tie when making such enquiries).
For new pipework, go to a local hydraulic supplies firm and ask them to copy the old parts. Or a firm like Pirtek. For checking and repairing electrics and injection, there are probably local auto-electrical and diesel specialists near you: many technicians set up as independents after the Lucas auto elecrical chain was asset stripped and closed down a few years back.

As for firms that can do engine rebuilds and machining, if your local enquiries draw a blank, try Bradbury Engineering near Market Drayton, or a bit further away from you, Davies Bearings Burry Port, Hargreaves Engineering Carmarthen, or City Electro Diesel Services in Swansea.
 
DoubleEnder said:
Thread revival.
I know it would be a faff but what about buying a new one in the USA New Yanmar 1GM10 9HP Inboard Diesel Engine - Sale !!
Ship it to uk and pay the VAT?
seems like an insane price difference
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Doubtless there will be shipping, and import duty, both of which will have vat added to.

After which they'll be little price benefit, and no warranty support

However, if we become the 51st state we can benefit from the economic scale advantages of the US dollar. Ooh, hey, that'd be like the advantage of being in the euro zone...

Dang!! 🙄🤣😂
 
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