Stuck on 1500 rpm, VP TAMD63p

[krhe00]

Hi! I'd appreciate some troubleshooting advice on my engine problems.

Engines:
2xVolvo Penta TAMD63p (in Fairline 43 Targa)

Problem:
Stuck on 1500 rpm (for about 45 sec) until engines/turbos eventually builds up power in and boat goes in plane.

Background:
During winter both engines were taken out as two new fuel tanks were put in.
Engines was serviced while out. Injectors, nozzles, heads and gaskets were renovated/changed (among other things). New fuel and oil filters.


Usually it will take the engines/turbos about 5 seconds to build up power and go from 1500 rpm to max at about 3200 rpm. The engines worked fine before the service.

Now, after the service, the power get stuck at 1500 rpm, even with full throttle for a long long time (about 45 sec) before engines/turbos will give power and rev up.
At low rpm's everything seems fine. Once revved up, I get lots of power.

I'd like to get some advice and inspiration on where to look.
With new tanks, it might be the fuel system and with the engine service done it might be the injectors or something else.
Sure, it might be something wrong with the turbos, but as said, they worked fine before the service and as far as I know they haven't been touched.

Based on the fault pattern, is it reasonable to think it got something to do with the fuel system (to little fuel, air leakage) or is it most likely in the engine side?
Where should I direct my attention?

Thanks in advance!

 

[Bandit]

It could be anything, a worn stuck Turbo, waste gate, sucking air in fuel system. If propped correctly the 63 p should rev to about 2800 to 2950 not 3200.

 

[kashurst]

worn turbo and or the turbo wastegate mechanism. check out the rubber pipe connecting the turbo to the inlet manifold and its clamps too. With help try and find inlet manifold leaks too when running at 1500 rpm. Any unusual whistling noises

plumb a boost pressure gauge into the inlet manifold to see what is happening.

 

[jrudge]

The challenge is so much has been done. I would get a vodia on it and see what is going on.

Logically ( not that boats and engines follow much logic ) it will be a turbo / waste gate issue as once it gets there it works.

 

[volvopaul]

The challenge is so much has been done. I would get a vodia on it and see what is going on.

Logically ( not that boats and engines follow much logic ) it will be a turbo / waste gate issue as once it gets there it works.

Vodia useless on a 63P as it’s a pure mechanical engine.

 

[Bandit]

I suspect wastegate, turbos or restricted fuel lines.