Page 3 of 9 FirstFirst 12345 ... LastLast
Results 41 to 60 of 161
  1. Member
    Join Date
    Oct 2005
    Location
    Flagstaff
    Posts
    6
    #41

    Opti was under temp and I knew what was wrong because of this post

    I had read this post a couple weeks ago. I always let my Opti 225 warm to 110 on the smartcraft guage before running it but 2 days ago during a Tx prefish, before the last run of the day, the engine wouldn't warm up over 78 in 55 degree water. Eased it back to the ramp and put it on the trailer, pulled the cover and backed it back in on the trailer and ran it for about 5 minutes. Pulled back out and felt both heads, the right bank was much cooler.
    Pulled the t-stat on the right head and there was a mesquite thorn stuck in it! The pointed end went right thru the gap in the t-stat but nub end was too big and jammed it in there. This desert lake came up about 50' last spring and there's lots of new brush, trees and cactus disintegrating now and somehow this thorn worked it's way up to the t-stat. Makes me wonder why something big enough to stick in the t-stat would be able to get into the engine?
    Thanks for your post Sherm, I had a good idea what was wrong before I even got back to the ramp and it made diagnosis and repair a snap!

  2. Member
    Join Date
    Jan 2006
    Location
    Buckeye Land
    Posts
    3,568
    #42
    Sherm, I have a 2002 XB250. Am I capable with this motor?

  3. Member
    Join Date
    Jun 2004
    Location
    Richmond
    Posts
    580
    #43

    Re: (Blaze250)

    Sherm or others may not notice your post since it is already pinned to the top. I think the 2002 and later EFI's are SmartCraft ready. I know the Opti's are. If so you should have the SmartCraft emblem on the back of your cowl. My 02 Opti does.

  4. Member
    Join Date
    Jan 2005
    Location
    Crystal Beach, Texas
    Posts
    1,112
    #44

    Re: (HighFiveBassin)

    I have an 01 Opti with the symbol on the motor and just had OPTI install the sc 1000 gauge on mine...( used it yesterday in 25 to 30 degree temps and still managed around 122 degree temps on the monitor) Nice safeguard !!

  5. Member
    Join Date
    Feb 2006
    Location
    Mid
    Posts
    21
    #45

    Re: Cold running an Optimax (Lea)

    I just purchased a new boat with a 150opti 2006, ideling around temp was 120-140 dgr, running around about 4500rpms runs at 80-82 dgr in 45 dgr water nevr gets any warmer, stop the boat engine temp goes right back to 120-140 this is after an hour of running time, I ran it at wide open for a minute but didt notice but a little warmer. A little concerened I called The tecks at the Mercury factary and they said " this is perfectly normal and how it should be on my particular engine" they also said "the trhermastat regulates the temp at idel but at full throtal a valve open up and bypasses the thermastat" this is on a 2006 150 Opti. Dave

  6. Moderator
    Join Date
    Dec 2004
    Location
    Chester,Va
    Posts
    3,404
    #46

    Re: (Blaze250)

    No, the xb250 is not compatable with smart craft.



  7. Member
    Join Date
    Mar 2006
    Location
    nORTH aUGUSTA
    Posts
    12
    #47

    Re: Cold running an Optimax (shermsmarine)

    Yep, great info just al little late. I have a 05 225 opti , blasted off got up to 5000 rpm and slung a rod through the powerhead. the mecanic said it was probbably cold seize, that was the fist I heard of it. I'll warm her up next time,

  8. Member
    Join Date
    Jan 2006
    Location
    Rochester
    Posts
    322
    #48

    Re: Cold running an Optimax (sctr21x)

    Why does this seem to be a sole Mercury issue?? I never hear anything about the other brands having this problem. I understand any of them would blow if not warmed up all the way but mainly with the stuck thermostats. Seems like that is biting alot of guys. Luckily alot of guys are catching it before having a major issue. I am just a little worried. Just picked up the new Champ with a 225 pro XS. I never took the cover of my last engine(not a Merc) unless I was changing plugs. Now I feel like I might need to be pulling things out of my thermostats quite often. I do alot of running in shallow water and river stuff. Should I be worried. Its an 06'

  9. Member
    Join Date
    Jan 2006
    Location
    Rochester
    Posts
    322
    #49

    Re: Cold running an Optimax (Eronningen)

    Anybody????

  10. Member
    Join Date
    Feb 2006
    Location
    Portageville, Mo
    Posts
    1,899
    #50

    Re: Cold running an Optimax (Eronningen)

    This does include older motors I have a 99 175efi. Do i need to be carefull also during cold water running
    Bass Cat Puma FTD Mercury 250 Pro Xs
    ......................................<u>Motorguid e, Abu Garcia, Pflueger, Toyota Trucks, Cooks Go-to-Tackle System</u>............................................

  11. Mid-West Rally Moderator rudapa's Avatar
    Join Date
    Apr 2005
    Location
    Beaver Lake, NE
    Posts
    35,191
    #51

    Re: Cold running an Optimax (Eronningen)

    "Is cold running only a Mercury problem?" That is a good question. Does anybody know?

  12. Member
    Join Date
    Jul 2005
    Location
    Bakersfield
    Posts
    88
    #52

    Re: Cold running an Optimax (shermsmarine)

    Regarding other motors, I owned a 175 Evinrude intruder (1992) great engine, never a problem. It did have one feature I did not like. It ran at fast idle for several minutes until the temp came up. manual said not to shift until the rpms dropped after intial starting. So at a tourney, i had to wait after coming off the trailer while the black engine boys dropped her in and went.

  13. Member
    Join Date
    Sep 2004
    Location
    Fond du lac
    Posts
    123
    #53

    Re: Cold running an Optimax (appraiserbuddy)

    Eronnigen,
    Running any engine in shallow water which is full of debris simply requires that you monitor your water pressure and engine temperature carefully. You shouldn't be worried, but you should just keep an eye on things when you are in extreme conditions.
    The thermostats do a pretty good job of keeping things flowing, but, if you are in some really bad stuff, some debris could work its way up to the stat. Just keep an eye on her when your in the nasty stuff, especially if your are "blasting" your way out of shallow, mucky water.
    You will love that motor and boat combination!!!!!

  14. Member
    Join Date
    Jan 2006
    Location
    Rochester
    Posts
    322
    #54

    Re: Cold running an Optimax (mark)

    Thanks for the reply. This isn't my first go around but it is my first Mercury. I maybe got overly worried based on all I have read, mainly on this site about plug thermostats. My prior engine was an Evinrude 200. I ran that through plenty of gunk and never had a problem. I guess I was wondering if I should worrry more with this new Merc. I thought maybe it was more fussy. But based on some of these comments now I guess I will do what I do.

  15. Member
    Join Date
    Sep 2006
    Location
    DOWAGIAC
    Posts
    2
    #55

    Re: Cold running an Optimax (Eronningen)

    Is it that hard to take the thermostats off to check them, do I need a seal kit to put them back on, I believe my opti must have something stuck in there because mine wont get over 90 deg at idle , and at wot it runs 115 deg, this is on a 05' 200 opti, when it get down to around 80 deg the check engine alarm comes on.It always used to get up to 120 - 130 deg at idle. thanks

  16. Member
    Join Date
    Jun 2004
    Location
    Richmond
    Posts
    580
    #56

    Re: Cold running an Optimax (CASEY G)

    It does sound like you have something stuck in your thermostats. I have had this happen on my 02 Opti. My understanding from reading here is the newer Opti's will send an alarm or fault code if, at idle the engine will not warm up after several minutes. The thermostat on the right head is probably the one stuck because that is where the sending unit is that gives you the reading on the Smartcraft. Touch both heads and you can easily feel the difference in temps. I would get the gaskets before removing the thermostat cover as you may rip one taking the cover off. On the right bank you will probably have to loosen the 2 bolts on the fuel rail some to lift the rail up a little to get one of the screws out that holds the thermostat cover on.

  17. Member
    Join Date
    Sep 2006
    Location
    DOWAGIAC
    Posts
    2
    #57

    Re: Cold running an Optimax (HighFiveBassin)

    thanks, and yes it was the right one. thanks again

  18. Member
    Join Date
    Oct 2006
    Location
    Columbus
    Posts
    8
    #58

    Re: Cold running an Optimax (CASEY G)

    Hey guys I'm new to BBC...

    Is this just a merc dfi problem? I have an '03 90 merc carb motor and I have always let it warm up first thing in the morning, but after that i usually just drop the hammer & drive. Even if I've been fishing for a while. Usually it doesn't idle to warm up as long as in the am. I do a lot of cold wheather fishing- usually until the water gets stiff!!

    Any ideas if cold sieze is a problem with the carb motors??

    Tim Bertrand
    Columbus, OH
    03 Ranger R61 / 90 Merc


  19. Member
    Join Date
    Aug 2006
    Location
    Lumberton
    Posts
    382
    #59

    Re: Cold running an Optimax (timbit)

    Is there anyway to tell the temp besides a smartcraft? Are they easy to install or should a dealer do it?

  20. Member
    Join Date
    Aug 2006
    Location
    NASHVILLE, TN
    Posts
    363
    #60

    Re: Cold running an Optimax (shermsmarine)

    The Smartcraft tachs will read water temperature along with a lot of other items.

Page 3 of 9 FirstFirst 12345 ... LastLast

Similar Threads

  1. Cold running 250 ProXS
    By PumaMatt in forum Mercury - 3 Liter & 3 Liter High Performance
    Replies: 5
    Last Post: 02-24-2012, 02:19 PM
  2. 3.0l Optimax won't go in gear when cold
    By Tom Rollins in forum Mercury - 3 Liter & 3 Liter High Performance
    Replies: 5
    Last Post: 11-01-2010, 09:49 AM
  3. Possible causes for cold running engine??
    By RDM0535 in forum Mercury - 3 Liter & 3 Liter High Performance
    Replies: 2
    Last Post: 10-30-2010, 04:53 AM
  4. -08 175 pro xs running very cold!
    By Bola in forum Mercury - 3 Liter & 3 Liter High Performance
    Replies: 10
    Last Post: 04-09-2009, 08:30 AM
  5. 99 200 hp efi / hard to keep running when cold
    By hvtexskeeter in forum Yamaha Motors
    Replies: 4
    Last Post: 09-01-2005, 01:37 AM

Tags for this Thread