Re: [Amel Yacht Owners] LOW ENGINE RPMS ON YANMAR 75
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When I was told by Bruntons that my Autoprop was what they recommended for a SM with 100 HP Yanmar, I had my fixed prop (which a good prop shop said was also over pitched for my 78 HP Volvo) repitched to what was recommended and got good rpm again. The Autoprop couldn't be repitched, so I replaced it with a MaxProp...not so persnickety as the AutoProp.
I wish I'd serviced the Autoprop first, it might have saved me 1000's of $.
I still have the repitched fixed prop (which is now under pitched for my new 110 Yanmar), and the old Autoprop which still hasn't been rebuilt.
If any one would like to buy either of these (but not both) I'd be happy to sell it for about half price plus shipping.
Karkauai at yahoo dot com
On Dec 6, 2015, at 5:20 PM, sailormon kimberlite@... [amelyachtowners] <amelyachtowners@...> wrote:
On kimberlite I had a loss of engine power. I tried everything and finally decided it was the prop. I ordered the stuff from AB marine and rented the tools. When I hauled the boat everything seemed fine . There was no play in the prop blades and everything spun freely---What the heck- I rebuilt the prop.
That was the problem. It is hard to believe that a few thousands of an inch makes a difference in the Autoprop performance, but it does.
Kimberlite Amel Super Maramu #376
When I had loss of rpm with my Volvo, I had the Autoprop cleaned and even out of the water all the blades spun freely on the hub. I know that the only thing I didn't do (because I didn't know better, was to have the prop serviced. Others have said that solved their problem. If its been awhile since it was serviced, I'd do that even if the blades spin freely.
Thanks. I'm diving the boat today .. It seems most feel prop is most likely. If not, I'll move through all suggested fixes
La Bella Vita