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 1 
 on: Today at 04:42:35 pm 
Started by Kiedroj - Last post by Kiedroj
Oddly enough we have new Tstats on each engine...  but we are going to swap the sensors over to see if we get the other engine to osluate...  Iím crossing my fingers itís a bad sensor because that is easy and really the last thing to try...   

 2 
 on: Today at 01:30:59 pm 
Started by Kiedroj - Last post by thunderstruck
Let's gather some data...  What is your water psi on both?
What you describe is exactly what we see alot in the cold Alaska waters from tstats that do not have the 1/8" hole drilled.

Remove the stat from the offending motor, go for a brief spin and see what the temps are.  If it settles down, then swap tstats between motors.

This process will help us determine if we are chasing a defective tstat, sensor or water flow issue.


This is a good recommendation.  Please let us know how it goes OP.


 3 
 on: May 20, 2019, 11:24:12 pm 
Started by Freejumper - Last post by Jeffi323
I had same issue recently, it was my map sensor boot on my 275, 2007 vrod .  $7 part

Vr
Jeff

 4 
 on: May 20, 2019, 09:19:03 pm 
Started by Captbill - Last post by Captbill
Does anyone have a link to this? I am in the process of re powering and this would be a big help.

 5 
 on: May 20, 2019, 05:08:19 pm 
Started by Kiedroj - Last post by Kiedroj
I attached a picture of my dash while running.  This was at cruise.  PSI has been within spec and with the new water pumps and poppets we just installed pressures are good.   

Mercury had advised to drill a small 1/8th inch hole in the thermostats to allow some water flow to the sensor and reduce the oscillation that occurs.  The odd thing, one engine is exact on spec (pressure, temp etc) and the starboard is oscillating.  Both have the exact new thermostats, water pumps, poppets etc... 


 6 
 on: May 20, 2019, 01:02:01 pm 
Started by Kiedroj - Last post by BrokenRudder.com
Let's gather some data...  What is your water psi on both?
What you describe is exactly what we see alot in the cold Alaska waters from tstats that do not have the 1/8" hole drilled.

Remove the stat from the offending motor, go for a brief spin and see what the temps are.  If it settles down, then swap tstats between motors.

This process will help us determine if we are chasing a defective tstat, sensor or water flow issue.

 7 
 on: May 20, 2019, 11:09:06 am 
Started by Kiedroj - Last post by Kiedroj
Following up on this thread and oscillating issue iíve had with my Starboard engine...  So weíve replaced Poppet, water pumps, and did the Mercury recommended hole in the thermostat.   The water temp for the Chesapeake Bay is 71degrees.  We still get extreme oscillation on the starboard from 150 up to 200 and repeat over and over again...  Port engine holds steady at 155degrees.    I should also say, these temps are at 3900 rpm at 39mph

Weíre now thinking of swapping the sensor to see if it happens on the other engine.

Any other thoughts?  Mercury said itís normal for oscillation on that engine in cold water, but now the Bay temps shouldnít affect it.

We never hit limp mode this time, but the oscillating temps make me crazy and anxious as you can imagine... 

Love to get other input from the proís...

Do do have an extended warranty for 2more years, but would love to get this issue solved and a solid running temp... 

 8 
 on: May 19, 2019, 10:57:15 pm 
Started by Freejumper - Last post by RazzleDazzle
Did you figure out how to resolve this issue?

I am experiencing similar symptoms with my Gen II 2007 150HP Verados. Just had a certified Verado tech do a full 300hr servicing on each motor (they have 600hours) and first time I use the motors they wonít go above 2500RPMs (I get one warning beep from the throttle area when rpms reach 2500 and then no more engine response to increasing throttle). No alarm messages on my SC display though. And during initial start of engine, I get one short beep which I understand indicates that all systems are functioning normally. My motors were working perfectly fine before this servicing so you can imagine my frustration. Aside from turning the motors off & back on again in addition to turning battery switch off and on, I have not tried any other forms of troubleshooting.

Suggestions?

 9 
 on: May 19, 2019, 08:41:42 pm 
Started by Bobh - Last post by Bobh
I have a 2018 Whaler 285 Conquest with 250 Verados and JPS.  I have a lot of play in the steering such that I can move the wheel about 4 to5 inches before any resistance is felt and the motors move.  This is very annoying but the dealer says this is normal and I have a problem accepting that.  Steering fluid is full on both pumps.  Has any one else had this issue?

 10 
 on: May 18, 2019, 07:41:25 pm 
Started by Froggin67 - Last post by Froggin67
Well the fix was to change starter and flywheel. Starter was worn allowing gear to extend too high. As for the motor dying, found connector to flywheel sensor bad. Made repairs and all is good.

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