Forums59
Topics1,037,815
Posts13,934,987
Members144,150
|
Most Online39,925 Dec 30th, 2023
|
|
Merc ProXs problem
#11316764
01/01/16 11:10 PM
|
Joined: Aug 2013
Posts: 83
BoneDiamond
OP
Outdoorsman
|
OP
Outdoorsman
Joined: Aug 2013
Posts: 83 |
Today I ran my boat about 1 mile from the ramp and lost rpm so I shut down and motor was shaking violently then died. I trolled back to ramp and saw metal( looked like cast aluminum) in the exhaust port by prop. Gear shift wouldn't go into forward until I too the prop off to look at lower unit oil. ( which was ok). Any ideas on where to start as far as a diagnosis would be helpful.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11316890
01/02/16 12:09 AM
|
Joined: Nov 2012
Posts: 806
JimmyP
Pro Angler
|
Pro Angler
Joined: Nov 2012
Posts: 806 |
Pull the plugs and look for melted aluminuim spots on them. Sounds like a piston let loose but I hope it's something else.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11317058
01/02/16 01:35 AM
|
Joined: Nov 2002
Posts: 4,439
Gamblinman
TFF Team Angler
|
TFF Team Angler
Joined: Nov 2002
Posts: 4,439 |
Hate to hear this...look into cold seize.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11317561
01/02/16 05:37 AM
|
Joined: May 2009
Posts: 47
LOSTTEXAN
Outdoorsman
|
Outdoorsman
Joined: May 2009
Posts: 47 |
I'm afraid this might not end well. As mentioned, pull the plugs, activate the kill switch and see if it will crank, and if so what it sounds like. With the plugs out you should be able bump the starter incrementally until you can see each piston top with a flashlight.
Grew up on Tawakoni and Texoma before hybrids and stripers existed on either.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11318157
01/02/16 05:52 PM
|
Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
|
TFF Guru
Joined: May 2003
Posts: 11,586 |
Drop the lower unit off first. See if it runs alright then. It will not hurt it to run for a few seconds just to check. If motor still sounds bad you have powerhead problems. How long did you let the motor warm up before you took off?
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11318366
01/02/16 08:59 PM
|
Joined: Aug 2013
Posts: 83
BoneDiamond
OP
Outdoorsman
|
OP
Outdoorsman
Joined: Aug 2013
Posts: 83 |
Just got home to tools to do some checking. Motor ran for several minutes before I ran. Outside temp was upper fortys water temp 55.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11318920
01/03/16 01:57 AM
|
Joined: Sep 2003
Posts: 5,511
Bruce's
TFF Celebrity
|
TFF Celebrity
Joined: Sep 2003
Posts: 5,511 |
I say lower unit as mentioned above.
Bruce's Sprinkler Repair 817-798-7246 52 years experience State Licensed Irrigation LI0017483
Fishing Texas lakes one at a time
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11323184
01/05/16 02:02 AM
|
Joined: Aug 2013
Posts: 83
BoneDiamond
OP
Outdoorsman
|
OP
Outdoorsman
Joined: Aug 2013
Posts: 83 |
I pulled the plugs. The #6 plug was damaged and had melted metal on it. So I guess I dropped a piston. What are y'alls suggestions going forward?
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11323807
01/05/16 11:45 AM
|
Joined: Nov 2006
Posts: 2,846
TLW
Extreme Angler
|
Extreme Angler
Joined: Nov 2006
Posts: 2,846 |
not good news, sorry man... even if you're able ta diy its gonna be expensive when its fixed tha right way!
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11323835
01/05/16 12:35 PM
|
Joined: Sep 2003
Posts: 5,511
Bruce's
TFF Celebrity
|
TFF Celebrity
Joined: Sep 2003
Posts: 5,511 |
Take the engine to a reputable engine builder that will give you a warranty. The cost to rebuild is going to run close to 4000. Thats a lot of coin to spend on the motor and not have at least a year warranty. Or you could talk to Mercury about a remann.
I am in the process of rigging a new Pro xs 250
Bruce's Sprinkler Repair 817-798-7246 52 years experience State Licensed Irrigation LI0017483
Fishing Texas lakes one at a time
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11362116
01/22/16 02:48 AM
|
Joined: Jun 2004
Posts: 1,509
OPTI
Extreme Angler
|
Extreme Angler
Joined: Jun 2004
Posts: 1,509 |
Sounds like it cold seized those 3 litres are famous for that this time of year. Piston swells faster than the block because of trash in the thermostats,gets # 6 everytime.
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11376359
01/28/16 03:55 PM
|
Joined: Jul 2010
Posts: 1,336
boatman025
Extreme Angler
|
Extreme Angler
Joined: Jul 2010
Posts: 1,336 |
where you located I'm in McKinney I can rebuild motor you I have a shop
Hughes Marine 3855 Osage Lane Wylie ,Texas
|
|
Re: Merc ProXs problem
[Re: BoneDiamond]
#11380181
01/30/16 03:46 AM
|
Joined: Jan 2010
Posts: 85
WillV
Outdoorsman
|
Outdoorsman
Joined: Jan 2010
Posts: 85 |
Sounds like a similar situation I've heard about with a 200 Merc. Different model, but long story short reed valve chipped off and got sucked into the piston and made a terrible rattling noise. This was a mid 80's 200 black max engine but the reed valves are paper thin and once they develop cracks it's easy for them to get sucked into the engine when the piston comes off and explosion.
|
|
Moderated by banker-always fishing, chickenman, Derek 🐝, Duck_Hunter, Fish Killer, J-2, Jacob, Jons3825, JustWingem, Nocona Brian, Toon-Troller, Uncle Zeek, Weekender1
|