rebuilt 200hp nanni t4 speed issue
Sept 13, 2023 10:57:20 GMT
Post by eoinok on Sept 13, 2023 10:57:20 GMT
Hi all - posting on behalf of a friend - he has a Jeanneau Merry Fisher 815 with the afore mentioned 200hp nanni t4 which was rebuilt after having piston issues.
As I understand, there is new pistons gone into it, cylinders rebored, new injectors and a rebuilt turbo.
Engine is running like a dream but under load will not rev up past 2700 rpm ~ 16/17kts.
Previously she would rev up to 3400rpm and hit 22kts or there abouts on top speed before engine got reworked.
It freely revs up to 3,000rpm and beyond when in idle.
Underload it freely and quickly revs & picks up speed to 16/17kts but seems to stop/hit a barrier and will not go beyond it.
Any thoughts on what could be causing this now? - prop is perfectly aligned etc and no errors are showing up on the dash.
Eoin
As I understand, there is new pistons gone into it, cylinders rebored, new injectors and a rebuilt turbo.
Engine is running like a dream but under load will not rev up past 2700 rpm ~ 16/17kts.
Previously she would rev up to 3400rpm and hit 22kts or there abouts on top speed before engine got reworked.
It freely revs up to 3,000rpm and beyond when in idle.
Underload it freely and quickly revs & picks up speed to 16/17kts but seems to stop/hit a barrier and will not go beyond it.
Any thoughts on what could be causing this now? - prop is perfectly aligned etc and no errors are showing up on the dash.
Eoin