Perkins or Deutz

[mby1105]

Perkins M135 non turbo versus Vetus Deutz DT44 or DT66 for new Dutch steel cruiser to be used mainly on the Thames so very low revs most of the time, any views please? Will a turbo engine be happy at low revs or will I get lots of smelly smoke with a under stretched turbo engine? Which engine is least noisy?

 

[steverow]

Perkins if it's in the UK.
Simply because of spares availability which are plentiful.
Perkins engines also outlast most others.

Steve.

 

[essexboy]

IMHO you should avoid turbo engines, they will glaze the bores if run at light load/ low speed.

 

[totopalm]

Perkins have been around a long time in the marine
business market, don't know much about Deutz
Can't comment on noise levels, never heard a Deutz
Perkins are reasonably quiet, very reliable, tried
and tested. If possible avoid Turbos on slow speed
cruising.don't know what size boat we are talking
about here,but non turboed boats are fine at displacement
speeds and use less fuel, and they will last longer
Cheers Tony

 

[marcusgillies]

Perkins all the way. The 135 is a fantastic engine 6.354 marinised by perkins / sabre who are now part of the CAT group. That in conjunction with a ZF Hurth 450A2 box @ 2:1 ratio would suit your needs brilliantly. Quiet and smooth and very economical running. 135hp @ 2,600 rpm. (rated @ the fly wheel).

 

[totopalm]

Hello Doc,
nice to get someone to agree about engines
got a pair Perky 225 TI in my boat, would'nt swop 'em
for any other engine.I'm in ABP marina Lowestoft we
must have passed each other time to time,before
Lowestoft i was at ST Olaves, be good to meet up
sometime. Cheers Tony

 

[npf1]

boatdoctor on theboards - question for you. Is a T135 a version of the 6354? Can you please explain a little more? Thanks

 

[mby1105]

Thanks for your comments. Boat is steel diplacement cruiser 12 meters length and about 12 tons. I hear that the Perkins M135 does not comply with latest emission requirements, whereas Vetus Deutz have launched a new version of 44 and 66 that do - but they are turbo.
Another possibility is the Perkins Sabre M92B but at only 85HP is this too small?

 

[Sammo]

No John 85 hp is not to small in fact I would have said it was just right. And the 6 cyl 135, is far to big.
It’s relatively easy to achieve the hull speed with a displacement boat and if you look at a typical 12 meter boat on say the broads you will see engines as small as 36hp (1.5 BMC) being used yet they’re still breaking the speed limits. It’s only when you start to climb your bow wave that you need the extra power.
I’ve had a planeing boat fitted with 2 Perkins 220`s and although they did the job at top speeds, when used at low speed they were a bit smoky.
Awhile ago back on here OLD_HARRY did a post explaining as to why they smoked that was very good, might be worth a search.
My present boat is 12 meter GRP and I have fitted a Mercedes 3 ltr 6 cyl 115 hp. This hp is only achieved as it is a high reving engine so it is fitted with a 3.1 reduction.
The main consideration is that although it is nearly the same power and it also has 6 cylinders its only half the size of the Perkins both physically and in cylinder capacity, an important consideration with more expensive red just round the corner.

IMHO for river use with the occasional sea cruise 85 hp makes more sense, as to the spec.
1 - German or Japanese (reliable)
2 - 5 or 6 cylinder (smooooth)
3 - Naturally aspirated (no turbo)
4 - Not single rail (beware complicated electrics)
5 - Small modern, rather than something developed from a truck engine.
6 - Timing chain rather than a toothed belt (that’s the most important spec of the lot)

 

[marcusgillies]

i dont know where you heard the bit about the M135 not complying with new emmision controls. i think your very much mistaken.