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Outboard Motor Forums (by brand) => Mercury/Mariner Outboards => Topic started by: sbg on April 24, 2016, 12:27:53 AM

Title: Loss of water pressure
Post by: sbg on April 24, 2016, 12:27:53 AM
Mercury 250 XS with a torque master lower unit. It has 4 small holes at the front of the nose of the foot. Floating logs around where I fish is unfortunatly an all too common thing. Some you can see and avoid. Others are just below the surface and are just waiting on you to come screaming by and try to chop it in half.

This happened to me a couple of weeks ago. It was on blast off so light wasnt the best. Luckily when I hit it I wasnt going that fast. Imediately my water pressure would not go over 3-4 psi. I know its bad but I kept a watch on my temp the rest of the day and didnt push the engine.  Fished the rest of the tourney and come on home.

The next day the surgery with little drill bits began.  I pulled the lower unit off and checked my water pump. It was fine so I put it back.  I dug and pryed all I could and got the wood out of those 4 little holes. Lower back on. Thought it was ok. Next weekend started a week long trip to Logan Martin. Well it wasnt. Lol. So I didnt venture too far out from our house. My temp would never get over 130ish unless I pushed it. 40-50 mph it was fine. Anything over that and it would start climbing. (Now I know how Tranz feels always at 40-50 mph  ;) )   

Got the foot off again yesterday and took it all apart again. This time however I took the shifter housing off. There it was.  Just in front of the shifter there is a verticle housing for the water inlet. It also has a bolt or pin or something right in the middle. Packed all around it was wood. Best tool I could come up with for shoving it all back down was an old hacksaw blade. It did great. I didnt have a screwdriver long enough to reach it. The drill bits came back out and I started getting all that wood out of those holes in the nose. What a pain in the arse.

Dumped the boat back in the river today and it did perfect. Full 15- sometimes 20 psi at full throttle.

Ok heres some pictures. Because everybody likes pictures!







Title: Re: Loss of water pressure
Post by: bullet20dc on April 24, 2016, 05:53:52 AM
good job   i get the same prob but with sand with that sporty  I got the torqumaster on the bench now almost completed.Pre LWP type.  Im not a big fan of LWP any more those over 90 mph days are gone now so back to a Torquemaster
Title: Re: Loss of water pressure
Post by: Nightmare on April 24, 2016, 08:25:06 AM
How DOOO you get a whole stump inside the motor???  (nope)
Title: Re: Loss of water pressure
Post by: sbg on April 24, 2016, 12:51:02 PM
Ha!  Yeah yeah how does that stump or log get in there! 
Title: Re: Loss of water pressure
Post by: bullet20dc on April 24, 2016, 05:39:55 PM
thru the holes in the lwp   If you hit a chunck of wood those screens dont stop it
ive gotten pebbles , sand , and wood chips in the stats and popit valves many times.
Title: Re: Loss of water pressure
Post by: Curt on April 24, 2016, 08:24:47 PM
That was some serious lumber in there!  (fp) (fp)

Glad you got it cleared all out the second time around, Good job!  :thumbup:

By the way, thanks for posting pics. It definitely helps to better understand what you were explaining!
Title: Re: Loss of water pressure
Post by: sbg on April 24, 2016, 08:31:10 PM
No problem with the pics.  :thumbup:

I hope it will help somebody and they will figure out what I was tryin to say. I know I learned a good bit from it.
Title: Re: Loss of water pressure
Post by: Curt on April 24, 2016, 08:33:18 PM
No problem with the pics.  :thumbup:

I hope it will help somebody and they will figure out what I was tryin to say. I know I learned a good bit from it.

Definitely helped a lot!

My speedo pickup is a tiny hole in the front of my foot. On more than one occasion it stopped working due to a piece of wood getting into it. Usually a small drill would clear it, but the last time it got plugged up, the drill trick didn't work. But since I have had a GPS for a few years now, I didn't bother looking into it any further  (nope)
Title: Re: Loss of water pressure
Post by: sbg on April 27, 2016, 10:48:41 PM
Yeah around here I quit fooling with tryin to keep the wood out of the speedo. Neither boat Ive had the speedo quit and I just gave up. The gps does alot better anyway. The speedometer's are always off anyway
Title: Re: Loss of water pressure
Post by: bullet20dc on April 28, 2016, 06:42:22 AM
yep analog speedos are usually happy to the tune of 5 to 8 mph   with the advent of GPS the 4 inch speedo hole is a waste of real estate on the dash

Title: Re: Loss of water pressure
Post by: Curt on April 28, 2016, 09:01:37 AM
with the advent of GPS the 4 inch speedo hole is a waste of real estate on the dash


Agreed!  :nod:
Title: Re: Loss of water pressure
Post by: frugalangler on April 28, 2016, 09:29:37 AM
Yeah around here I quit fooling with tryin to keep the wood out of the speedo. Neither boat Ive had the speedo quit and I just gave up. The gps does alot better anyway. The speedometer's are always off anyway
Nope, the speedo hole now lives on as many audio mfg's are making a round audio head that replaces either the tach or speedo, makes a neat clean audio install in the place of the totally IMHO useless speedo hole!
Title: Re: Loss of water pressure
Post by: bullet20dc on April 28, 2016, 10:25:33 AM
yep my speedo hole now houses the smartcraft unit a  much better use of a hole
Title: Re: Loss of water pressure
Post by: Curt on April 28, 2016, 11:55:11 AM
yep my speedo hole now houses the smartcraft unit a  much better use of a hole

Smartcraft unit? Don't know what that is. Do tell  :nod:
Title: Re: Loss of water pressure
Post by: sbg on April 28, 2016, 01:50:07 PM
Yep mine has a smartcraft unit in it too.
Its a digital gauge that you can tell water psi, temp, rpm, trim, gallon used and all that fun stuff. Its the only way to to with a Merc.
Title: Re: Loss of water pressure
Post by: JackJ on April 28, 2016, 02:17:14 PM
I have a smartcraft also, but mine is not the one that goes in place of the speedo.   
This is the one I have.  Curt, you can get them on ebay for less han $200.00 

(https://www.bassboatboards.com/proxy.php?request=http%3A%2F%2Fi390.photobucket.com%2Falbums%2Foo347%2Fshleif%2FDSC05477.jpg&hash=bb8dde45bfb3e60cb81d314dd1afa4ea63c5721c)
Title: Re: Loss of water pressure
Post by: Curt on April 29, 2016, 09:24:43 AM

Its a digital gauge that you can tell water psi, temp, rpm, trim, gallon used and all that fun stuff. Its the only way to to with a Merc.

Ah, OK. Makes sense now!
Title: Re: Loss of water pressure
Post by: Curt on April 29, 2016, 09:25:20 AM
@JackJ Thanks for the pic. Are they only available for Merc outboards?
Title: Re: Loss of water pressure
Post by: JackJ on April 29, 2016, 09:44:08 AM
Pretty sure you can get these type gauges for about any brand, I know for sure Yamaha.
Title: Re: Loss of water pressure
Post by: frugalangler on April 29, 2016, 09:46:44 AM
Pretty sure you can get these type gauges for about any brand, I know for sure Yamaha.

any idea what's involved with a retro-fit from standard analogue gauges on HPDI Vmax Series II - I'm familiar w/ merc motors, but this Yammie is new blood for me
Title: Re: Loss of water pressure
Post by: JackJ on April 29, 2016, 09:55:56 AM
Well when I say I know they make them for Yamaha it was because I have seen the ones like this..  http://www.amazon.com/Yamaha-Outboard-Multi-Function-Tachometer-6Y5-8350T-83-00/dp/B005CXL1UI

I have no clue what it takes to actually hook one up.
Title: Re: Loss of water pressure
Post by: Curt on April 29, 2016, 01:43:12 PM
Well when I say I know they make them for Yamaha it was because I have seen the ones like this..  http://www.amazon.com/Yamaha-Outboard-Multi-Function-Tachometer-6Y5-8350T-83-00/dp/B005CXL1UI


Thanks Jack! Definitely a handy unit to have in the dashboard  :thumbup:
Title: Re: Loss of water pressure
Post by: sbg on April 29, 2016, 02:32:56 PM
Yep thats one of 2 of the ones I have. I did not put them in so I dont know how the previous owner did it. One like the one in the pic has replaced a gauge. Not sure which one. The other one is a little bigger looking and replaced my mph gauge. Definatly worth the money. Charlie knows more about them than I do but I think you have to get a module for it besides just the gauge. Could be wrong. But if your motor is capabale of having a smart craft gauge I highly recommend getting one.
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