Black Valkyrie
Active Member
Hi long time no post. Interesting problem has arisen.
Had my boat tuned up in the spring. Runs fine. In neutral both engines run freely up to 4300 rpm. Underway port engine runs up to 4300rpm with no change in velocity past 2500 rpm.
Starboard engine underway wont rev past 3200 rpm.
Best speed I can manage is 13 mph instead of a previous top speed of 30mph.
Mechanic says the starboard prop is spun (to me this is illogical) ... to test I changed the starboard prop to my (new) spare and it made zero difference.
I (sadly) dont have a spare port prop and the unit onboard is the old style (no flow torq) and no one local will rebuild so I assume next step is to buy new port prop and change it out.
Question - if the port prop is spun would that prevent the starboard engine from exceeding 3200rpm under load?
Or is there something else more sinister lurking underneath I should be investigating?
Losing confidence in my mechanic.
Thx!
Had my boat tuned up in the spring. Runs fine. In neutral both engines run freely up to 4300 rpm. Underway port engine runs up to 4300rpm with no change in velocity past 2500 rpm.
Starboard engine underway wont rev past 3200 rpm.
Best speed I can manage is 13 mph instead of a previous top speed of 30mph.
Mechanic says the starboard prop is spun (to me this is illogical) ... to test I changed the starboard prop to my (new) spare and it made zero difference.
I (sadly) dont have a spare port prop and the unit onboard is the old style (no flow torq) and no one local will rebuild so I assume next step is to buy new port prop and change it out.
Question - if the port prop is spun would that prevent the starboard engine from exceeding 3200rpm under load?
Or is there something else more sinister lurking underneath I should be investigating?
Losing confidence in my mechanic.
Thx!