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Dec 30th, 2023
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 Yamaha hpdi water leak
#14784460
07/20/23 07:23 PM
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Joined: Mar 2012
Posts: 192
Stick um all
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2012
Posts: 192 |
Noticed water running out of engine compartment. Took the cover off and found water coming from back top of the engine. The area under the drive gear. Help anyone?
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784550
07/20/23 08:59 PM
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Joined: Mar 2008
Posts: 1,635
James P.
Extreme Angler
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Extreme Angler
Joined: Mar 2008
Posts: 1,635 |
Maybe the water pressure little hose on back of motor?
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784601
07/20/23 09:46 PM
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Joined: Mar 2012
Posts: 192
Stick um all
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2012
Posts: 192 |
Looks like it’s coming from a gasket. It’s hard to see
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784657
07/20/23 10:42 PM
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Joined: Jan 2005
Posts: 6,897
ChanceHuiet
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 6,897 |
I had something like this happen and mine was head gasket. I pray thats not what happened to yours. But mine was an absolute ton of water.
I can backlash toilet paper.
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784689
07/20/23 11:06 PM
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Joined: Feb 2003
Posts: 55,364
SkeeterRonnie
Super Freak
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Super Freak
Joined: Feb 2003
Posts: 55,364 |
My leak in the same area was the white tube that runs to the water pressure gauge. I suggest backing it down a NON BUSY ramp, remove the cowling and start the motor to see where the leak is coming from. May take a minute for the thermostats to open. water under the hood gets sucked into the intake and is not good on pistons or engine performance.
Last edited by SkeeterRonnie; 07/20/23 11:07 PM.
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784711
07/20/23 11:27 PM
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Joined: Jan 2013
Posts: 2,104
reelswift
Extreme Angler
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Extreme Angler
Joined: Jan 2013
Posts: 2,104 |
Can you pressure it up with a garden hose and take close look ?
Team LVS34
Captain WNB
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784721
07/20/23 11:36 PM
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Joined: Mar 2012
Posts: 192
Stick um all
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2012
Posts: 192 |
When I put the garden hose on it nothing comes out until I start the engine
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784731
07/20/23 11:43 PM
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Joined: Jan 2013
Posts: 2,104
reelswift
Extreme Angler
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Extreme Angler
Joined: Jan 2013
Posts: 2,104 |
When I put the garden hose on it nothing comes out until I start the engine Dang that don't sound like the water pressure gauge tube.Does the engine run/operate properly no overheat alarm ? Can you run a compression test ?
Last edited by reelswift; 07/20/23 11:45 PM.
Team LVS34
Captain WNB
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784754
07/21/23 12:05 AM
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Joined: Mar 2012
Posts: 192
Stick um all
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2012
Posts: 192 |
No over heat alarm but on a prior trip the engine was running a little rough at low RPMs thought that it was the 02 sensor. I took it one it fouled with carbon. Looked almost like melted plastic. Cleaned it best I could. Seemed to run better. On the next trip I noticed the water. It’s hard to see down here n there were the water is running from
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14784917
07/21/23 03:02 AM
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Joined: Sep 2022
Posts: 316
Bassjiggin1955
Angler
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Angler
Joined: Sep 2022
Posts: 316 |
I just bought a 87 395 ranger with a 225 Yamaha excel the motor has 175 hour on it and looks brand new under the cowl but it has been setting for 16 years in a shop under a custom cover my question is there a small white hose it come from dash going into the motor and it is broke just before it go into the motor. Would that be difficult to change out The boat still looks great but my mechanic is going to go through it to make sure everything going to work before putting it back on the water. All fluids and impeller new plugs inspect and replace oil injection with new oil rebuild carbs if needed new gas.
Home of the Original Puffball jig
Home of the Original Lions collar jig
Building and fishing custom bass jigs since 1977
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14785164
07/21/23 01:34 PM
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Joined: May 2008
Posts: 358
blackhorse
Angler
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Angler
Joined: May 2008
Posts: 358 |
Get rid of it before it blows up like my 250 HPDI did. And yes I maintained it religiously.
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14785169
07/21/23 01:37 PM
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Joined: Jun 2008
Posts: 3,337
Hog Jaw
TFF Team Angler
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TFF Team Angler
Joined: Jun 2008
Posts: 3,337 |
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Re: Yamaha hpdi water leak
[Re: Stick um all]
#14786310
07/22/23 03:04 PM
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Joined: Mar 2012
Posts: 192
Stick um all
OP
Outdoorsman
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OP
Outdoorsman
Joined: Mar 2012
Posts: 192 |
IT’s coming from the top of a plate between the heads. I think that it’s the exhaust cover. Has anyone had this issue?
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