Volvo D6-330 won’t rev above 2500

If the revs go up quicker than normal then it does sound like the prop or props on that engine, and the one with the apparent issue is actually doing the most work.

Other than the Vodia log test for % load, the only other thing to do is swap props from side to side and see if it changes sides.

It would explain the higher boost pressure I guess.
 
have you tried driving the boat one engine at a time. It won't plane but should reveal which engine/drive is working properly
 
One more bit of information I thought of is that normally with both engines at 2500rpm I get 18-20 kts. With my current problems I get 14. Does this throw anymore light??
 
mcanderson said:
One more bit of information I thought of is that normally with both engines at 2500rpm I get 18-20 kts. With my current problems I get 14. Does this throw anymore light??
Click to expand...

That does make it sound like a spun prop, unfortunately. Get the local vp dealer to sea trial it with the vodia tool connected.
 
Thanks Jimmy. I will get in touch with them today. I have checked the price for new props €2K, I have also seen that you can get old props rebushed. It will be a balance between time and cost I guess. As are most things in life. Soon I will get around to starting my 'why won't my generator start' thread!
 
mcanderson said:
Thanks Jimmy. I will get in touch with them today. I have checked the price for new props €2K, I have also seen that you can get old props rebushed. It will be a balance between time and cost I guess. As are most things in life. Soon I will get around to starting my 'why won't my generator start' thread!
Click to expand...

Yep but you'd be surprised how expensive rebushing a DPH prop is. If the diagnosis is confirmed, the best approach would be to get the new props fitted, and then get the old set rebushed and keep them as a spare.
 
mcanderson said:
A quick phone call to Castle Marine gave me a quote of £500 for rebushing the two props.

Time to call the mechanic.
Click to expand...

Shane
Steel Developments rebushed my (now) spare set of DPH props for considerably less than that. I too had already bought a new set (similar ish sort of money), so I now have a spare set which I keep on the boat. When you do get round to the 'generator not starting' thread - let me know as I too had one that failed to start (fixed that) then moved on to intermittent cutouts (also now fixed) - what type of generator is it (same boat/engines) ??
Will see if I can find more info on props tonight when I get home.
Mike
 
Mike,

Thanks for the lead. I will give them a call. Just waiting for my mechanic to get back to me with when he can do the sea trial.

Generator is an MASE 5.0. Started fine then started to run rough and then stopped. Will crank fine, but not fire. Suspect fuel starvation. I couldn't get a new filter in Beaulieu before I left, plus with the engines playing up the priority had to be the engines.

As I won't be back on the boat for a month I wasn't going to start a thread about the generator just yet as I can't do any fault finding.
 
mcanderson said:
Mike,

Thanks for the lead. I will give them a call. Just waiting for my mechanic to get back to me with when he can do the sea trial.

Generator is an MASE 5.0. Started fine then started to run rough and then stopped. Will crank fine, but not fire. Suspect fuel starvation. I couldn't get a new filter in Beaulieu before I left, plus with the engines playing up the priority had to be the engines.

As I won't be back on the boat for a month I wasn't going to start a thread about the generator just yet as I can't do any fault finding.
Click to expand...

OK - generator not the same make/model - mine is a Dometic BlueTEC40, so unable to assist with your fault diagnosis (although many of the problems on mine were related to filters , fuel starvation or air entering fuel lines !).
All the best.
 
So a slipping set of props have been diagnosed. Can you change them in the water or do I need a lift? I’m thinking about flying down, taking them off, bring them back as hold luggage and having them rebushed. I would then take them back down in a couple of weeks and refit them, again in the water.

Thoughts???
 
It all depends on how long your bathing platform is, and whether you can get your arms to undo the second prop nut from a tender.

I've changed props on a DP-E drive from a tender, and it would be similar for DP-H.
I wouldn't say it was easy: you need flat water, and dropping anything (tools, propellors) is always a hazard.
Also bear in mind a G-series prop is also really quite heavy (9kg?).

It's not something I would suggest unless you have removed/replaced props out of the water a few times- it's all much easier out of the water.

.
 
Last edited:
mcanderson said:
So a slipping set of props have been diagnosed. Can you change them in the water or do I need a lift? I’m thinking about flying down, taking them off, bring them back as hold luggage and having them rebushed. I would then take them back down in a couple of weeks and refit them, again in the water.

Thoughts???
Click to expand...

This is a bad idea. Maybe if you'd done it before a bunch of times; but you haven't, so the chances are you're going to drop something and then you'll need a tow and a lift to sort the problem.

The right answer here is buy a new set of props, lift the boat, swap the props over, take the old ones back to the UK, rebush at your leisure and then you have a spare set for next time this happens, which it will.
 
Mike, Jimmy, thanks. A moment of madness. It happens after a martini or two. I will see what the engineer has to say on Monday. Getting things done in August in France - my sides are hurting I am laughing so much.
 
It rather depends how handy you are with spannering tbo .

The guys in my marina regularly remove duoprops with the boat @ the dock .
Lift the legs , use a wooden block jammed between them , use the tools provided etc .
They also use a small lump hammer to tap the spanner(s) .
For the inner I recall putting them in gear .
There are a bit more then two nuts ( outer / inner ) - there are some washers or some may call then spacers and you need to remember with the help of the manual where they go @ refit .
Watch for a washer sticking on the back of a prop when it slides off .

They use some blue coloured grease on reassembly in the water .

I have even removed them in the water at a safe anchorage ( 3m sandy bottom ) to remove builders baler band wrapped between them .Then refitted - snorkel only + legs up .
Owners manual is quit explicit.

That’s supposed to be a sales pitch of the duoprops over shaft ?


What’s your engineer guy proposed ?

There must be a local “ rebusher “ nearby as there’s at least 10,000 duo prop boats twixt La Rague - Monaco ??

The HQ of VP.Fr along with parts where house open to the trade and public is just off J 41 of the A8 Mandelieu la Napoule .So as a back up plan , if you need something ( that’s lost at the bottom of the berth ! ) you are gonna need a hire car .They have the classic Fr 2 hr lunch btw and close @5 . Also ck out the B/H situation being Fr , before you plan the dash down .

I spent my life in there when I had a VP engined boat with duoprops .

They have mobile engineers too ,but you will pay for “ travel time “ being so far away .

Of course it may be worth getting a handle on the geny issue , cos if that needs a lift to resolve killing two birds with - - springs to mind .
 
L,

I know one end of a spanner from the other, but struggle with technical terms. I got the results from the sea trial at 18:17 last night so 19:17 in France. A bit unfair to start bombarding the VP guy then, so I will wait until Monday. Google has thrown up a prop guy in Antibes, but who knows if he will be open in August.

We are driving down in two weeks so at least I won’t need a hire car if I need to get any parts!

Gen issue is bound to be fuel - I have filters and a spare fuel pump ready to go.
 
You must log in or register to reply here.

Share this page

Top