Volvo penta KAD32DP

[Doublerum]

Hi all.
I am a newbie to boating and have already found out about the dig in your pocket again bit.
We bought a Sealine 285 Ambassador fitted with twin Volvo KAD32 DPs and had a survey done to make sure all was ok before purchase.
The first time we took her out we discovered that the port engine would only rev to 1500 and the starboard would surge at anything over 2000
According to the Volvo engineers at the marina, (who will remsin nameless for the time being) there is a problem with the port turbo and the stsrbosrd engine is surging to compensate.
As far as I can see, that must surely be impossible because both engines have their own fuel system and throttle and reading through the handbook, you can run on just one engine.
I have been around diesels all my life as a truck driver and when a turbo goes you get a lot of black smoke as the engine is over fueling.
If i run at 1500 revs on both engines by matching speeds on the throttles i can make about 7 knots and both engines sound sweet but port throttle lever is at max and starboard is about a third.
My suspicions are that the port linkage is faulty somewhere and is not opening the pump as it should.
Fuel filters have been replaced and made no difference.
Any suggestions please

 

[pvb]

Welcome to the forums!

Sorry to hear of your experiences. If you post your question on the Motor Boat Forum, you're more likely to find answers from people who know the KAD32 engine.

 

[Doublerum]

Welcome to the forums!

Sorry to hear of your experiences. If you post your question on the Motor Boat Forum, you're more likely to find answers from people who know the KAD32 engine.

Many thanks, now reposed as recommended

 

[Momac]

If you go just over 1500rpm the supercharger should cut on with a noticeable sound . Is that happening on both engines?

 

[Jamie Dundee]

Slipping prop hub on the stbd engine?

 

[Doublerum]

If you go just over 1500rpm the supercharger should cut on with a noticeable sound . Is that happening on both engines?

Port engine will not go over 1500 so that one won't apply. Starboard engine, i dont know as i have kept revs down to match the port engine. It is something i can try next time i take her out.

 

[Doublerum]

Slipping prop hub on the stbd engine?

How can icheck that please

 

[Momac]

Slipping prop hub on the stbd engine?

Could be .
Could check that by swapping props between legs .

 

[Momac]

Deleted - confirm or rule out prop issue first
Props may be changed with the boat in the water if a suitably safe location can be found.

 

[Jamie Dundee]

How can icheck that please

As MartynG says, swap the props over. If the problem shifts engines then you need a new/refurbished prop

 

[pvb]

Deleted - confirm or rule out prop issue first
Props may be changed with the boat in the water if a suitably safe location can be found.

I don't think it's a 2-minute job to change DuoProps, is it?

 

[Momac]

I don't think it's a 2-minute job to change DuoProps, is it?

I changed a set in the water at my home berth at the marina which is quite shallow . So I used a step ladder and waders .
You do need to have changed the props previously in order to know what you are doing and to avoid losing the trust washers . If the splines were not greased prior to a fitting that might be an issue .

A slipway could be used - backing the boat up using ropes .

.

 

[Doublerum]

I changed a set in the water at my home berth at the marina which is quite shallow . So I used a step ladder and waders .
You do need to have changed the props previously in order to know what you are doing and to avoid losing the trust washers . If the splines were not greased prior to a fitting that might be an issue .

A slipway could be used - backing the boat up using ropes .

Never done anything like that so i will leave that to someone who knows what they are doing