Speedo’s not working
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=6906
Printed Date: May-17-2024 at 12:16pm
Topic: Speedo’s not working
Posted By: ultrarunner
Subject: Speedo’s not working
Date Posted: June-01-2007 at 12:01pm
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Ok, only getting a little movement out of each one. I have dual Airguide 725's. Original pitot's. I have taken off both pitot's and cleaned them. I not yet resorted to putting air in any of the lines. Where should I start next?
This install does not appear to have the bleeder system installed. Trouble shooting tells me to blow out the lines. Do I do this from the speedo side? And do I disconnect from the stabilizer? I have the back panel off so I can see the tubes are hooked up to the stabilizer. Thanks |
Replies:
Posted By: bmiller
Date Posted: June-01-2007 at 12:22pm
| I would disconnect both sides and blow it out.Are the pitots the orginal to the boat? |
Posted By: 8122pbrainard
Date Posted: June-01-2007 at 12:43pm
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Ultra, Are you in a part of the country that freezes? I have seen trapped water in the stablizer freeze and break them open. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: ultrarunner
Date Posted: June-01-2007 at 12:44pm
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These are the original pitot's.
Should I blow out through the stabilizer, or disconnect from the speedo and and the output side of the stabilizer. Or leave connected to the stabilizer? |
Posted By: ultrarunner
Date Posted: June-01-2007 at 12:46pm
| The boat has been in the north country when in storage. I'll pull of the stabilizers and inspect them. Can they be damaged by blowing them out? |
Posted By: 8122pbrainard
Date Posted: June-01-2007 at 12:51pm
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Ultra, You can blow in them without damage since they are simply hollow brass tubes. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: ultrarunner
Date Posted: June-01-2007 at 1:06pm
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Thanks 8122...Headed down there now. I'll pull 'em off the bulkhead and inspect them. The boat sat for quite some time, so I wouldn't be surprise if they're clogged up.
Ultra |
Posted By: DeepCreekNauti
Date Posted: June-01-2007 at 6:20pm
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I know that blowing them out is common but be careful. We had similar issues with our speedos over the years and the marina would always use air compressor to blow them out. I would always ask them if that could hurt the boat or damage anything. They always told me no.
Well, 2 summers ago was the last time and the trouble began. We were plagued with problems. Apparently, the shot of high pressure air blew out the bottom end of one of the stabilizers. The slow leak resulted in dead batteries, burned out bilge pumps, condesation on the motor, etc. We thought is was a bad cover (replaced), cracked exhaust pipe (replaced), through hull fittings, Muffler covers (replaced), intake houses (replaced). See were I'm going? After some beer this weekend my brother gets a wild hair and wants to see whats behind the gas tank. BINGO...he finds the leak. I would recommend to always inspect them after using high pressure air when cleaning them out. By the way, were can I get a new stabilizer? |
Posted By: dans
Date Posted: June-02-2007 at 1:23am
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Did you clean out the pitots with a little needle ? That got mine working. Dan ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1404&sort=&pagenum=1&yrstart=1981&yrend=198582 - 82 2001 |
Posted By: 8122pbrainard
Date Posted: June-02-2007 at 8:03am
Deep Creek, From what you have said, I'll bet the stabilizer was freeze damaged and the air just "helped" the end come off. The stabilizer is a copper tube similar to the copper water piping and can handle a fair amount of pressure. However, I wouln't go crank up the compressor past 100psi. The stabilizer can be easily made from copper pipe, reducing couplings and threaded adapters. Then compression fittings to match the pitot tubing. Make sure you use the brass sleeves on the fittings that fit inside of the pitot tubing. They are made for the soft tubing. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
DeepCreekNauti wrote:Posted By: 85Nautique
Date Posted: June-05-2007 at 10:00am
| Should I Clear the speedo lines from the pickups or at the dash. I hope that I can do it from the pickups |
Posted By: 8122pbrainard
Date Posted: June-05-2007 at 11:22am
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85, If you can, I would blow from both directions. Once you think they are clear, I would attach the speedo end and connect the pitot end to the air supply. Using a pressure regulator starting at 0 psi turn the pressure up to say 45 mph and check for leaks. It would be ideal if you could valve off the air leaving the gauge inline and see if you loose any psi over time. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: 85Nautique
Date Posted: June-05-2007 at 11:44am
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I am sorry can you break it down to dumb for me
I do not have a pressure regulator - can i use just basic hand tools to get the thing working I have one that work's but the water i run in gets thick with grass |
Posted By: 8122pbrainard
Date Posted: June-05-2007 at 12:21pm
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85, Without a source of compressed air, I really don't know how to clean out the pitot tubing. Maybe you can get a small wire in one end but it won't go very far.The replacement tubing is available from marine supplys and isn't that expensive. I just replaced mine on my 77 Tique.
I'm also sorry to say that I don't know how to keep the weeds from the lake out of the pitot ether. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: CCrider89
Date Posted: June-05-2007 at 6:09pm
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Be very carefull when using compessed air. There is a previous thread which suggests a bicycle pump, which, I used and it cleared the line and also was able to test the repair I made on the frost crack in the speedo. ------------- CCrider89 Boating in the northern Adirondacks |
Posted By: 85Nautique
Date Posted: June-05-2007 at 7:26pm
| CCrider89 did you go from the dash or from the back or from the pick ups? is it easy to remove the tubes from the speedos them self. |
Posted By: CCrider89
Date Posted: June-05-2007 at 11:09pm
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85
I went from the dash. Very easy to get to on my 89. Slide your seat all the way back and lift the passenger seat. Slide underneath and bring a flash light with you. The tube is held on with a nut but it is very lightly threaded (5/16" I think). There are actually no threads on the speedo out tube, only barbs. We disconnected the pito pick up to test the air through just the tube and then my son blocked the tube at the stern with his thumb and I sucked on the tube under the dash to check for leaks creating a vaccum, you can tell if there is a leak if you loose vaccum. We reconected the pitot and blew the line with the bicycle pump. Cleared it all out and no leaks on either line. ------------- CCrider89 Boating in the northern Adirondacks |
Posted By: 8122pbrainard
Date Posted: June-06-2007 at 4:45am
Yes, do be carefull. This is why I have already stated to use a pressure regulator starting at 0 psi. I seem to recall that 20 psi will give you a 50 mph reading on the speedo. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: David F
Date Posted: June-06-2007 at 9:39am
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I use compressed air from the speedo end (after disconnecting from the speedo). My friend (who does not have an air compressor) uses the "canned air" designed to dust off your computer. He says it works great. I strongly recommned against using compressed air toward the speedo unless the pressure lines are disconnect first. ------------- |
Posted By: 85Nautique
Date Posted: June-06-2007 at 10:58am
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So I think I am going to try ro diconnect the line from the dash and pickup and use some compressed air to clean out the line.
Wish me luck 
I had nothing but 5mph in the right side speedo I hope this work's |
Posted By: David F
Date Posted: June-06-2007 at 11:32am
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Just make sure the pitot is cleared first and back down the pressure you use. If not careful, you can pop a line off a fitting (may not leak becuase the pitot will still be clogged). Old clogs can be hard as a rock.
Why not disconnect the line from the pitot and make sure the pitot is clear before going any further. Too much pressure against a clogged line might cuase the (old) line to rupture and then you have a task on your hands. IMHO: the flow trough pitot design is much better and easier to unclog than the old style Airguide pitot. I believe Skidim sells the flow through pitot. the same mounting holes on the transom can be used, so no new drilling required (you only use two of the three holes on the new pitot, I believe). ------------- |