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Thread: Plugged pitot
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08-29-2015, 02:56 PM #1
Plugged pitot
After running through some milfoil the pitot in my lower unit that I use with my dash speedo is hopelessly plugged. I have tried compressed air, and I have tried to carefully run a small drill bit by hand into the entrance of the pitot, but nothing I've tried has loosened up the blockage enough. Suggestions?
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08-29-2015, 06:32 PM #2Junior Member
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Buy a new pilot jet. They aren't that expensive. If it's that's jammed up... then you may damage it trying to get it clear "mechanically."
Personally, I use spray carb cleaner, and compressed air back and forth. Eventually it will soften, and pop out.
BUT... if the jet is that gummed... then what do the bypass ports in the carb body look like??? If they are plugged... it will fall on it's face when you hit the throttle.
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08-29-2015, 06:46 PM #3
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08-29-2015, 09:17 PM #4
Soak it for a couple of days in a bucket of water, then run a guitar string through it.
'89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
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08-29-2015, 10:51 PM #5
I've tried blowing through the speedo side with compressed air. Still jammed. Even running it through the water at 70+ mph isn't clearing it. I don't have a bucket big enough to soak it in water for days. Hmm.
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08-30-2015, 12:43 PM #6
I see... You're talking about the integrated pickup in the lower unit.
Unplug it after a day of boating then... Go to the local music store first, and ask for a .030" guitar string. The outer winding will taper down and end about 6" before the end, leaving a 6" tail of plain steel wire approx. .015". Start with the thin core end, then use the full diameter part to pop the crap out.'89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
My YouTube videos________My Flickr photo gallery
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08-30-2015, 02:57 PM #75000 RPM
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hand held pin vise with small drillbit is the only way I've luck with(carefully)-th
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08-30-2015, 05:46 PM #8Junior Member
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08-30-2015, 06:36 PM #9
I gave up on that thing 20 years ago and added a pitot to the transom. Works well and doesn't plug.
Last edited by Glasstream15; 08-31-2015 at 05:11 AM.
I carry a gun because a cop won't fit in my pocket.
1987 Glasstream 15V
1986 Mariner "Tower of Power" 115
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08-30-2015, 07:52 PM #10
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08-31-2015, 10:49 PM #11
pressure speedo is so square duuuuude,,,,,, time for a GPS speedo
"One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .
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09-01-2015, 01:09 AM #12
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dompie99 liked this post
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09-01-2015, 08:31 PM #13
Save those E and A string tips after you restring. They're great for unplugging super glue tips and such.
'89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
My YouTube videos________My Flickr photo gallery
http://www.facebook.com/profile.php?id=1706097519
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09-02-2015, 10:55 PM #14
Pull the lower unit off and go from the top down with a piece of heavy wire and some compressed air. I have cleared many this way.
Carter
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09-03-2015, 12:24 AM #15
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