Re: [Amel Yacht Owners] D3-110I-C Wandering RPM
Hello Dean, and hive of cognoscenti.toggle quoted messageShow quoted text
Please have a look at this video if you’d be so kind:
I started noticing your description several months ago. Pre boost pressure sensor fault, pre long block failure. We hauled out in Martinique in April. Serviced c drive, autoprop etc. I noticed that 2 of the autoprop arms fell with gravity alone. The third needed coaxing from a finger. More grease and it was better but never equivalent to the other 2. Minimal vibration. Hard to know how much vibration is normal as only have had the boat 1.5 years. Never motored on another 54 or SM for that matter.
So.... after finding sputtering oil from the dipstick confirming to Volvo the Long block was shot we had a new long block installed and engine back in the boat Friday with sea trial last Saturday. While out of the water I sanded and acid washed the prop. Still noted one arm stiffer than the other. But not worse that it had been.
During the sea-trial we had Lots of rpm variability such as dean described but even +/-50-100 rpm. But not close to what is seen in the video. Our WOT was held to 2360. CDM/Volvo with their vodia computers hooked to the engine blessed it and said it was good. Hands washed they said the variability had to come from the prop. (I had not disclosed my observations under the hull while out of the water).
This Last Monday real world test: we set out southwest from Panama City to isla Contadora. RPM wandering was much higher- this is when Video was taken. Wasn’t the most relaxing of trips in addition to being late and arriving in the dark we had an explosion of late afternoon lightning storms with webs of red and blue current above us.
So we’re at anchor south of Contadora, arrived safely and this am I dove and switched the autoprop to the fixed, spare prop. Thanks Bill Rouse and James Cromie!
Sea-trial this afternoon.
I’ll report findings.
Thanks to everyone!!
Porter/Helen Grace and Lilly.
Excuse the errors.
Sent from my IPhone
On Aug 29, 2018, at 10:27 AM, trifin@... [amelyachtowners] <amelyachtowners@...> wrote: