Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 28-08-2012, 19:37   #46
Registered User
 
GreggL's Avatar

Join Date: Feb 2012
Location: NYC
Boat: Hunter E33
Posts: 194
Quote:
Originally Posted by Ex-Calif
My bet is on bottom and prop fouling...

New boat? I can't believe Hunter put the wrong prop and rigged the throttle incorrectly.

Gregg - I know you have significant powerboat experience. In general sailing boats have "just enough" power and are more sensitive to fouling than powerboats which generally have an excess of power.

Most folks clean/wipe their hulls monthly depending on the sailing area and how much performance they want from their sailboat.

The first check when sailing or power performance/low rpm is suspect are prop wraps and fouling.
Certainly wouldn't be the first thing hunter rigged wrong on this particular build. Nonetheless I'll check out my hull and prop. Thanks!
__________________

__________________
GreggL is offline   Reply With Quote
Old 28-08-2012, 19:39   #47
Registered User

Join Date: Aug 2010
Location: sydney, australia
Boat: 38 roberts ketch
Posts: 1,021
Images: 3
Re: Largest Auxiliary Engine Possible

Quote:
Originally Posted by GreggL View Post
This makes sense. Only problem with this theory may be that I did not have this problem from day one. Is seems to have only begun after my 50 hour service. Certainly haven't changed any hardware since then.
I'm going to check the hull and take it from there.
Thanks everyone for the replies..
did they detail what they did in the 50 hour service (hate to say it but mechanics can do some stupid things sometimes) - it does seem unlikely a new boat would be overpropped, even less likely if it initially ran ok. hull fouling over a few months also shouldnt make much difference. I reckon do the rev check - ie check full revs in neutral, if it doesnt pull 3500 at least thats an indicator of something amiss. The only thing i would suspect below the waterline is the prop - either barnacles or something fouled on it, that would certainly slow the boat, barnacles probably wouldnt get much of a hold over just a few months either...the only silver lining i can see is that by the time you've sorted all this out you'll know a whole lot more about your boat.
__________________

__________________
charliehows is offline   Reply With Quote
Old 28-08-2012, 19:41   #48
Registered User
 
GreggL's Avatar

Join Date: Feb 2012
Location: NYC
Boat: Hunter E33
Posts: 194
Quote:
Originally Posted by charliehows
did they detail what they did in the 50 hour service (hate to say it but mechanics can do some stupid things sometimes) - it does seem unlikely a new boat would be overpropped, even less likely if it initially ran ok. hull fouling over a few months also shouldnt make much difference. I reckon do the rev check - ie check full revs in neutral, if it doesnt pull 3500 at least thats an indicator of something amiss. The only thing i would suspect below the waterline is the prop - either barnacles or something fouled on it, that would certainly slow the boat, barnacles probably wouldnt get much of a hold over just a few months either...the only silver lining i can see is that by the time you've sorted all this out you'll know a whole lot more about your boat.
No details but they said everything was as its supposed to be. Ill look into reving in neutral tomorrow and take it from there.
__________________
GreggL is offline   Reply With Quote
Old 28-08-2012, 19:53   #49
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,373
Re: Largest Auxiliary Engine Possible

Quote:
Originally Posted by Ex-Calif View Post
My bet is on bottom and prop fouling...

New boat? I can't believe Hunter put the wrong prop and rigged the throttle incorrectly.

Gregg - I know you have significant powerboat experience. In general sailing boats have "just enough" power and are more sensitive to fouling than powerboats which generally have an excess of power.

Most folks clean/wipe their hulls monthly depending on the sailing area and how much performance they want from their sailboat.

The first check when sailing or power performance/low rpm is suspect are prop wraps and fouling.
Agree. Prop fouling of some variety seems most likely, especially since Gregg reports that he didn't have the problem earlier. The puzzler, maybe just a coincidence, is the problem seemed to appear right after the 50 hour service.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 28-08-2012, 21:20   #50
Registered User
 
Nicholson58's Avatar

Join Date: Jan 2011
Location: Live aboard
Boat: Camper & Nicholson58 Ketch - ROXY Traverse City, Michigan No.668283
Posts: 3,466
Images: 83
Re: Largest Auxiliary Engine Possible

Interesting observations reguarding prop pitch and RPM. Our boat is 55,000 disp with a 115 Westerbeke 6-cyl; 2:1 Twin Disk reduction gear and a Hundested variable pitch control to the 3-blade 24 inch prop. We run comfortably at 950 to 1200 engine rpm and around 7 knots in flat seas & windless. 4 nm/gallon is about the rule for us. I can run up to about 2500 rpm and vary the prop pitch which is useful for increasing the thrust at low boat speed such as in maneuvering or pulling off a surprise sand bar. I can run at the higher rpm and reduced prop pitch at up to about 10 knots but higher total power demand for sustained periods results in overheating. All heat exchangers were de-scaled this spring and the system is clean.
Attached Thumbnails
Click image for larger version

Name:	DSC_4687.jpg
Views:	46
Size:	439.6 KB
ID:	45708   Click image for larger version

Name:	PA180013.jpg
Views:	48
Size:	384.7 KB
ID:	45709  

__________________
Nicholson58 is offline   Reply With Quote
Old 29-08-2012, 09:38   #51
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,022
Re: Largest Auxiliary Engine Possible

Dan-
"New boat? I can't believe Hunter put the wrong prop and rigged the throttle incorrectly."
Actually, with Hunter's recent bankruptcy? It wouldn't be unusual for wrong parts to be used or poor work to be done in the final months of a bankruptcy, where someone says "We're out of blah blah props, just use a whatever and ship it". Same thing for adjustments and such, with possible payroll problems and so on.
Hopefully not, but it has happened before in that situation.
__________________

__________________
hellosailor is offline   Reply With Quote
Reply

Tags
engine

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:42.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.