Hi ;
I have 1995 Wellcraft Martinique 27 with single Volvo Penta KAD 42 B.
Boat was cruising with max 3800 rpm and 35 knots but one day it just stucked with max. 2300 rpm and 7 knots at full throttle.
Then engine overhauled, turbo, compressor, injectors, diesel pump, intercooler, all filters changed.
Hull and propellers are good, fuel tanks clean and fuel flow is ok.
But the problem is same.
On idle, boat reaches max. 4000 rpm which is very good but on load it stucks at 2300 rpm and 7 knots.
Even there are no any smoke and unusual sound. (Compressor kicks in at 1800 rmp but boat wont go more than 2300 rpm)
I just checked may times with volvo penta mechanic and could not found any air leak or else.
What should the problem be ?
I test the boat many times with 2 people and 8 people still same problem.
I changed the propellers, put smaller ones for testing but same.
I would be glad if you can advice where should i check more or do i miss any points to check ?
Thanks
I have 1995 Wellcraft Martinique 27 with single Volvo Penta KAD 42 B.
Boat was cruising with max 3800 rpm and 35 knots but one day it just stucked with max. 2300 rpm and 7 knots at full throttle.
Then engine overhauled, turbo, compressor, injectors, diesel pump, intercooler, all filters changed.
Hull and propellers are good, fuel tanks clean and fuel flow is ok.
But the problem is same.
On idle, boat reaches max. 4000 rpm which is very good but on load it stucks at 2300 rpm and 7 knots.
Even there are no any smoke and unusual sound. (Compressor kicks in at 1800 rmp but boat wont go more than 2300 rpm)
I just checked may times with volvo penta mechanic and could not found any air leak or else.
What should the problem be ?
I test the boat many times with 2 people and 8 people still same problem.
I changed the propellers, put smaller ones for testing but same.
I would be glad if you can advice where should i check more or do i miss any points to check ?
Thanks