Thornycroft T80 Engine

[boatmike]

As fitted to many Moody 346 and 35s. Anyone know the make and rating of the standard alternator offhand???

 

[Rappey]

So basically a morris 1.5 diesel, or a bmc 1.5
Type in bmc 1.5 alternator into ebay and you will find lots of lucas that were fitted to many bmc,s
FITS 1.5 1.8 BMC DIESEL MARINE CANALBOAT MAE BOAT BARGE 12v/70amp NEW ALTERNATOR | eBay

Not sure if there was a standard alternator back in the 60,s but the first I would guess would be around 35 to 45 amp.
75 amp is the max recommended.

 

[boatmike]

er Don't understand the 'back in the 60s ' bit. This is a T80 built in 1992..........

 

[penberth3]

er Don't understand the 'back in the 60s ' bit. This is a T80 built in 1992..........

I think someone might be getting their model numbers mixed up, and it isn't you!

 

[HissyFit]

er Don't understand the 'back in the 60s ' bit. This is a T80 built in 1992..........

But anything designed by, and designated as, 'BMC' was designed in the 60's.

 

[Molteni]

The T80 is basically a Mitsubishi K4 marinised by Thorneycroft.
The alternator is a standard Lucas A127, as fitted to numerous UK vehicles in the 1980s and 1990s. It's rated at 70Amps, although you can get an uprated "narrowboat" version at 120Amp.
They can be sourced new at around £70, far better value than alternators supplied by other marine engines

 

[[70521]]

er Don't understand the 'back in the 60s ' bit. This is a T80 built in 1992..........

But the kit was designed in the 1960s.

 

[HissyFit]

The T80 is basically a Mitsubishi K4 marinised by Thorneycroft.
The alternator is a standard Lucas A127, as fitted to numerous UK vehicles in the 1980s and 1990s. It's rated at 70Amps, although you can get an uprated "narrowboat" version at 120Amp.
They can be sourced new at around £70, far better value than alternators supplied by other marine engines

So not a BMC at all, which earlier Thornycrofts were.

 

[Tranona]

But the kit was designed in the 1960s.

No, probably mid 80s. Modern Mitsubishi NOT 1950/60s BMC B series.

 

[Rappey]

Don't understand the 'back in the 60s ' bit. This is a T80 built in 1992.

My bad. I blame google and only reading the first header I saw rather than clicking on it and seeing 1.5 mentioned ?.

 

[boatmike]

The T80 is basically a Mitsubishi K4 marinised by Thorneycroft.
The alternator is a standard Lucas A127, as fitted to numerous UK vehicles in the 1980s and 1990s. It's rated at 70Amps, although you can get an uprated "narrowboat" version at 120Amp.
They can be sourced new at around £70, far better value than alternators supplied by other marine engines

Thanks for that Moltini. Thats what I wanted, Ta

 

[scottie]

I suspect that the original thorneycroft handy billy would consider the BMC as Johnny come lately

 

[Jim@sea]

As fitted to many Moody 346 and 35s. Anyone know the make and rating of the standard alternator offhand???

As it happens I have one for sale which came off a 50 Hp Thornycroft BMC Diesel.
I made a mistake. On the boat I bought there was a perfectly good Lucas Alternator but like most people who have just bought a boat you look round for an excuse to spend money. With these Lucas Alternators they have a separate Regulator, I found that I could buy a higher output New Alternator which had an internal Regulator, so I bought one. But a nightmare to wire up as I had to bypass the old Regulator.
If you do buy a New Alternator try and get a Reconditioned Lucas one.

 

[Molteni]

I installed a Sterling external regulator which has dramatically increased the original A127s output. Part of the installation involves soldering a wire to inside the alternator. Whilst "inside", I noticed the brushes (bushes?) were hardly worn so I just re-installed the original alternator.

The plan had been to fit a cheap new alternator thinking I'd keep the original as a spare. But the original's internals seemed in such condition that I haven't bothered! The cheap (far eastern?) one sits unused in the spares cupboard. The original Lucas alternator carries on producing power without problem.