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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

9.9 motor only doing 2 knots w/ no current

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77Gypsy
Captain

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USA
356 Posts

Initially Posted - 06/21/2003 : 20:25:16

i was out off the chesapeake bay today in one of the rivers and i ad my throttle completely opened up to th maximum speed. I was only barely doing 1.5 - 2kts. i'm not sure what the problem is. i insected the motor once i returned to the slip and noticed about 1000 barnicles on the prop blades. could this cause the speed to drop from an etstimated 6knts that i should be getting from a honda 9.9? oto barely 2 knts? or could it ba a more serious problem with the engine?

Steve
78 C25 SR/FK - Gypsy
<img src="http://www.websdf.com/gypsy_sign.jpg" border=0>

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 06/21/2003 : 21:56:33

Steve,<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>... and noticed about 1000 barnicles on the prop blades. could this cause the speed to drop ...?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>Yes. Props are very sensative to anything that disrupts the smooth flow of water over the surfaces of the blades. I've seen cases were barnacle fouled props would hamper performance so bad that the boat couldn't even get back into its slip under its own power once the skipper realized there was a problem. The good news, of course, is that the problem is cheap and easy to fix. But how did you let your prop grow barnacles in the first place? Outboard engines should be tilted up out of the water when they're not in use. They're not designed to soak in barnacle friendly water indefinitely.

-- Leon Sisson

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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 06/21/2003 : 23:17:00

1000 barnacles on that little thing?? Leon's right--you have an egg beater, not a prop. The barnacles turn the water to a highly turbulent froth that's flying in all directions, rather than a directional thrust. Imagine sailing to windward with vertical slats on each sail, perpendicular to the sails. You'd might end up drifting backward.

Dave Bristle - 1985 C-25 #5032 SR-FK-Dinette-Honda "Passage" in SW CT

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77Gypsy
Captain

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USA
356 Posts

Response Posted - 06/22/2003 : 01:54:58

thank you so much! i thought it was a more serious problem.

Steve
78 C25 SR/FK - Gypsy
<img src="http://www.websdf.com/gypsy_sign.jpg" border=0>

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Stu Jackson C34
Admiral

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844 Posts

Response Posted - 06/22/2003 : 02:43:19

Steve

You really need to spend more time on your boat and less on this forum (unless you learn to hit the capital shift key to get I instead of iiiiiii).

You've done a great job putting your logo on your posts, and asking a lot of questions about bigger boats that you may get in the future to go around the world, but just enjoy THIS summer.

The sound of water hissing alongside is much more fun than typing keystrokes. Believe, me, I hear them both, and enjoy the water version much more.

Enjoy,

Stu

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Douglas
Master Marine Consultant

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1595 Posts

Response Posted - 06/22/2003 : 03:00:01

I have one realy big question. If your prop has so many barnicals you must be leaving the boat in the water for long periods. NOW HOW MANY BARNICALS DO YOU THINK ARE ON THE HULL AND KEEL ??????????????????????????
Thats one hell of a lot of drag.

Doug&Ruth
Triska (Alberg 29)
Tacoma Wa.

Edited by - Douglas on 06/23/2003 12:05:05

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Dave B
Admiral

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Mali
863 Posts

Response Posted - 06/22/2003 : 14:47:50

Doug: Take out some of those ?????s so we can read the thread without scrolling sideways... <img src=icon_smile_wink.gif border=0 align=middle>

Dave Bristle, 1985 C-25 #5032 "Passage" SR/FK/Dinette/Honda in SW CT

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Brooke Willson
Admiral

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USA
983 Posts

Response Posted - 06/22/2003 : 19:30:38

Barnacles would do it. I thought maybe he had hooked a crab pot and was dragging it. Been there, done that.

I agree with Stu: go sailing (right after you've cleaned the prop). And for heaven's sake, lift and tilt the motor when it's not running!

Brooke

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tom
1st Mate

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USA
52 Posts

Response Posted - 06/22/2003 : 20:20:48

lets give him a break. It has been raining every #@!* weekend since I can remember.

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Douglas
Master Marine Consultant

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1595 Posts

Response Posted - 06/23/2003 : 12:07:35

Tom You dont know what rain is. Try moving to Seattle. Why do you think almost every boat picture you see from here has a dodger in it. BTW I'm still betting he has a farm on the bottom of his boat.

Doug&Ruth
Triska (Alberg 29)
Tacoma Wa.

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tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 06/23/2003 : 13:21:55

Doug's observation is worth considering," the prop is not the only berth place for barnacles".

Val on Calista # 3936

Val Bisagni]<img src="http://im1.shutterfly.com/procserv/47b3df11b3127cce94709c5ff2e90000000010" border=0>

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osmepneo
Past Commodore

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USA
1420 Posts

Response Posted - 06/23/2003 : 13:48:33

Barnys on the bottom certainly can and does do a number on speed and forward motion.

One year on the Hudson I went out in September, and when I tacked to starboard I made so little headway that current took me back to the club. couldn't understand the problem until I hauled out a few weeks later, and discovered I was had the NYC of barnys on my bottom.

I'd either go over the side to see what the bottom looks like or haul prepared to power wash the bottom and refinish it. Of course that takes away from sailing, but are you really sailing with that much barnys?

Don Peet
c25, 1665, osmepneo, sr/wk
The Great Sacandaga Lake, NY

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77Gypsy
Captain

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USA
356 Posts

Response Posted - 06/25/2003 : 12:26:03

i plan to do some scraping today only on the motor, i don;t think the bottom should be a problem cuz i have some ood antifouling down there.

Steve
78 C25 SR/FK - Gypsy
<img src="http://www.websdf.com/gypsy_sign.jpg" border=0>

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77Gypsy
Captain

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USA
356 Posts

Response Posted - 06/27/2003 : 11:15:11

actually, after scraping the motor, i was able to see the bottom. it is pretty bad. i don't think i want to take gypsy out of the water and delay my sailing.

Steve
78 C25 SR/FK - Gypsy
<img src="http://www.websdf.com/gypsy_sign.jpg" border=0>

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 06/27/2003 : 13:03:21

Steve,<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>... was able to see the bottom... pretty bad... don't ... want to ... delay my sailing.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>When I was preparing to bring my Catalina 25 home for the first time, it had several years accumulation of growth on the bottom. I didn't want to spend the time and money to have a full bottom job done there in Miami.

My crew and I anchored the boat in clear water, ran "underwater jacklines" along each side of the boat for handholds, put on snorkling gear, each tethered a putty knife to our wrist, and jumped in. With one of us working on each side of the boat, we had most of the fouling scraped off within a couple of hours. The boat sailed noticably faster afterward.

If you can anchor in water that's clear enough to tell what you're doing, that might be worth a try. If you're a SCUBA diver, then that's even better.

-- Leon Sisson

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 06/27/2003 : 23:06:04

"Pretty bad" as in barnacles growing on the hull too... or just 'crud' ?

If you don't have barnacles or really 'heavy' growth (yet) get a 'Dry Diver' and give it a go, they work pretty well and will keep things clean if used on a regular basis.

Currently maintaining two holes in the water...'77 Venture 23 and new to the family,
'78 Catalina 25

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77Gypsy
Captain

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USA
356 Posts

Response Posted - 07/03/2003 : 22:49:12

ok, i took your advice. i cleaned off the prop first and cruised under power at the approx 6 knts.

my marina is pulling the boat out and presure washing the bottom without redoing the paint of anything till later. I'll let you all know how she sails after the weekend.

Steve
78 C25 SR/FK - Gypsy
<img src="http://www.websdf.com/logo.jpg" border=0>

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 07/04/2003 : 12:34:57

I think you'll find a clean bottom makes a HUGE difference.

IMHO Maintaining a clean, smooth bottom is perhaps the single most important factor in boat performance.

Currently maintaining two holes in the water...'77 Venture 23 and new to the family,
'78 Catalina 25

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