D6 350 views

[z1ppy]

Afternoon,

Any positive / negative views on these on outdrives??

I know ( from experience) there were issues with the d3 engines but thought the larger ones were better??

Engines in question are 2007 with 80 hours serviced every year...

Thank
Zippy

 

[spannerman]

If they have only done 80 hrs in 4 yrs then they are seriously underused and barely run in! On the other hand if they have been serviced every year then thats a positive, as they have had they same amount of servicing as engines which have run 800 hrs (200hr intervals).
The early engines had problems with injectors which are now modified and have been fitted as standard for the past 2 yrs, these could have been replaced or still original and not given any problems (yet at only 80hrs!)
I'd give it a good sea trial and check the engine pulls smoothly all through the rev range and achieves WOT of 3600rpm, if there is a bad injector it will not reach WOT and usually shows up as a misfire/uneven running around 1500rpm upwards, sometimes it evens out again a higher rpm so run at 15-1800rpm and gradually increase to 2500 as this is the area it shows up most.
I have changed several dozen injectors on D4/6 engines but since the modified injector came out none have given any trouble.
Also check the seawater filter cover isn't leaking as there is a modded version of that and also the front cover on the intercooler has been subject of upgrades so look for salt around it, these need checking as if left will cause seawater to corrode the main wiring harness which means engine out to replace, this is a well known repair to us Volvo engineers
The other issue is steering rams and hoses for the both steering and trim rams leaking, again lost count of how many I have changed.
Check the trim pump oil reservoir to see if its low on oil, also the servo steering reservoir to see if the oil is pink (seawater contamination), the big giveaway is at the helm if its a flybridge go up there and check if the steering feels notchy which means its low on oil i.e. leaking. You can run the engines and go lock to lock on the steering then look to see if there is any oil on the surface behind the boat.
Volvo are on their 3rd version of steering ram and 2nd version of hose, we have boats which are on their 4th set of rams and hoses.
I don't mean to paint a black picture but these latter items are almost service items for us engineers!
The engine is a solid reliable lump but the early ones had several teething problems which are now ironed out, I only mention this as these engines are '07 models with very low hours, normal useage would have put 2-300hrs on them and the bugs would have been ironed out where as these may still be waiting to manifest themselves.
I strongly suggest you have a Volvo engineer give them a once over to be safe.

 

[Geoffs]

I have a D4/DPH 5yrs old and 780hrs.

The D4 has been fine, up to now, lovely smooth and responsive engine.

The DPH drive is a nightmare. The steering ram issues are well documented. I recently had a trim hydraulic hose fail, fair enough after 780hrs. The problems arose when changing them.

The leg had to me removed to get at them, again fair enough. But just about every nut bolt, pin and fastening was seized solid, resulting in shearing and damage to other components.

The result was a visit from Big Bill, just for a simple hydraulic hose change (the hoses themselves £110 each!). It seems DPH drives are fine, as long you don't get them wet.

I'd avoid any vessel with DPH drives, like the plague. I'd not have any more. They simply are just not fit for purpose.

Volvo need to get their design and metallurgy right, and replace all those that are faulty. I mean, who in their right mind puts steering rams outside the boat, under water!

 

[kashurst]

A bit of thread drift - but on similar lines what are the D9's like at a similar age but with 900 hours on them? (sorry to butt in)

 

[Latestarter1]

A bit of thread drift - but on similar lines what are the D9's like at a similar age but with 900 hours on them? (sorry to butt in)

Similar lines......afraid not, comparison is apples, oranges, pears or whatever other fruit you can think of. Wet liner, electronic unit injector engine designed for all manner of applications, not just marine. Designed and built by Volvo.

Volvo D4/6 is parent bore common rail engine major design work done by Deutz in Germany but built at Volvo's Vara plant. Designed exclusively for Volvo Penta marine applications. In the displacement node is one of just two makes which have to be considered 'best in class'.

Word is that Volvo are doing major tear up of design and are testing D9/D11 with common rail for Tier 4 Final emissions, just as CAT have already dumped HUEI on the C9 and also gone common rail.

 

[volvopaul]

Similar lines......afraid not, comparison is apples, oranges, pears or whatever other fruit you can think of. Wet liner, electronic unit injector engine designed for all manner of applications, not just marine. Designed and built by Volvo.

Volvo D4/6 is parent bore common rail engine major design work done by Deutz in Germany but built at Volvo's Vara plant. Designed exclusively for Volvo Penta marine applications. In the displacement node is one of just two makes which have to be considered 'best in class'.

Word is that Volvo are doing major tear up of design and are testing D9/D11 with common rail for Tier 4 Final emissions, just as CAT have already dumped HUEI on the C9 and also gone common rail.

Latestarter and myself know one one D9 thats failed at very low hours and was 100% serviced at the correct intervals and correct genuine parts supplied and fitted.

I have serviced many D9s there a great motor all be it a little noisey in my opinion.

 

[z1ppy]

Thank you.

I have heard about stearing rams and hoses from others as well! nice little money make for Volvo!

will check the other points if we lookto go forward. full inspection by Volvo agent for sure!

Thanks