Mercruiser temperature fluctuates. May 14, 2014 · Re: Mercruiser 3.

Mercruiser temperature fluctuates 5/200hp Mercruiser Last Boat- 1998 Capri 1950CL 3. Portside is doing this crazy heat dance. Aug 27, 2019 · Symptom: Temp gauge after warm-up is rock-solid at just under 170 degrees until the boat starts to plane. running 180 on muffs. I have not tried it this time but plan to next time I take the boat out. When I go above idle, the temperature may fluctuate suddenly between 100 and 170 degrees, and then return to a constant 170 degrees for a while. Here are my two problems: 1. 0 Mercruiser. So Jun 26, 2018 · Temperature fluctuations. Sep 16, 2013 · 2/ Fitted new sender & thermostat (separately & separately tested) same fluctuating temp (as old units) perhaps with a little more range and apparent speed of cycle with new ones. I then used an IR temperature gun to see if I had a problem with my raiser and or manifold. The compression check shows 190 to 205 on all 16 cylinders. 0 MPI Overheating/Temp gauge issues. 0 Well I took it out and drove it @ 4200 rpm @ approx 55-60 kmh for about 24 km and it never really moved off the 170/175 range . I have checked the wiring from the sender to the gauge and its good. 3MPI temperature fluctuating. 2. 0 MPI in it and late last season it started running hot out of no where. I verified the gauge was working, the sending wire was not shorted anywhere, and finally verified the temp sender was functioning. Sometimes the alarm starts to buzz, which I believe is an overheat alarm. They just don't cool of that much that fast. Sep 12, 2016 · I I have a 2000 7. The boat is a 2002 310DA, with Twin Mercruiser 350 MAG MPI BlueWater Raw Water Cooled Inboards with a total time of 112 hours. Anyhow, I took the boat out this past weekend and after a short while at around 3000 rpms, the engine alarm sounded. Aug 2, 2012 · Re: Normal operating temp merc 305 5. 190 degrees was the lowest temperature appearing at full throttle - about 42mph or so. I did notice that when the radiator fan kicks on high, this is May 17, 2018 · However, when we took it out and opened the throttle up a bit, the temp got a little cooler. Starboard runs fine. Followers 0. Thread starter FISHARIZONA33; Start date Jul 18, 2020; F. The boat had no problem staying at 200 degrees under power, but approaches 220 at idle when sitting at the dock for 3-5 minutes. Sep 26, 2010 · Re: Mercruiser 7. Once I reduced throttle, the temp went down but even at lower rmps, the temp gauge would rapidly fluctuate between 150 and 210 degrees. Reply to this topic Jul 20, 2011 · The starboard temp gauge appears a bit wonky, I see it bumping between 170 and 220 rapidly. 0 mercruiser carb alpha drive 100 hours engine alarm comes on periodically when temp rises above 160 never gets to 170. This fluctuation is the same whether I'm at idle or cruising. They look new. Last season my temperature gauge started to raise at idle and as soon as I open the throttle the temperature will go down to normal operation (160-170 degrees). I?ve had the thermostat, water pump, temperature sensor all replaced, but keep having the same issue. New impeller & housing, new thermostat 160, new water pump circulator, new temp gauge and sending unit. After about 20 seconds on plane, the temp gauge fluctuates wildly. I think it was the second to last time we had it on the lake that it heated up and I really didnt Customer: Hi I have a 2008 baja with a 5. By marshall48, June 26, 2018 in Maintenance, Tech Info & Troubleshooting. Runs all day at 3,000 rpms. May 14, 2014 · Re: Mercruiser 3. 4 Running Cool - Temp Gauge Fluctuates 100 to 170 I replaced the t-stat (correctly) and the t-stat housing and the sender in the t-stat housing and I still have the problem (gauge fluctuates from 100 to 170). I installed a new impeller but still had temp issues. gear lube level is good oil pressure runs in the middle of the gauge at idle and 3/4 at WOT driver's side riser (stbd?) gets hot periodically so you can't put your hand on it does it at mid throttle, never idle and rarely at full speed. The engine can't change temperature drastically. Started @ 170 under load went too 175 and held . Temp once warmed up, stays right at 170. The only part of the motor that is hot is the thermostat Mercruiser 4. 3 in a Sea Ray 185 I/O bowrider. 0 with new riser and elbow runs well but am now seeing a rapidly fluctuating temp gauge. Now it is fluctuating. I've got a '98 5. Put in new impeller this spring, and just changed the thermostat but still does the same thing. Aug 27, 2013 · Engine Temp Fluctuations. Nov 29, 2005 · With all this new equipment, the motor temperature fluctuates very rapidly from 145 - 210 and then back down to 180 degrees in matter of seconds. I've also placed a spring at the end of and inside the raw water intake hose (where it joins the thermostat housing) to ensure against kinking. 2l Merc. It will sit at 160 and then go to 180 and then back to 160. By hot I mean about 200 or around there, 180 is center on the temp gauge. Jun 28, 2013 · New member here. I did test the t-stat to be sure it opens at 170. The temp gauge was over 200 degrees. Apr 22, 2021 · The impeller is a mercruiser part and the thermostat is a Sierra part. It will swing from 100 degrees to 200 degrees in about 3 seconds. Drop it back down to 3,00 and temp goes back down, May 11, 2015 · I have a 23 Sea Ray Sundancer I/O Mercruiser 1994 5. blaster · Sep 13, 2012 · Hey folks I was trying to diagnose a problem on my 88 Stingray (3. 4 mpi Mercruiser Bravo 3. Now if the gauge was just fluctuating around 20 degrees I would say thermostat. Apr 28, 2008 · Both were rebuilt in 2006 (or so I was told). Out of about 7 thermostats that I have replaced in the past 15 years, only about 2 have maintained constant engine temperature -- approximately 170 degrrees. 3L. I have two motors. My exhaust manifolds were clogged up pretty good. Went for a test ride today and the temperature was still going up to 200 then cooling back down Jul 10, 2016 · Have a 2001 mercruiser 4. 0 M/C raw-wat "I have a 2000 5. 6l alpha 1. 0 L mercruiser) with the water temperature gauge not working. 7 MPI inboard Running Hot I've been trouble shooting overheating problems with my 6. 5L Ecoboost that keeps having issues with fluctuating engine temp. Checked water temp gauge using Ohm meter (all OK ? eg working per sender resistance) 3/ Disconnected calorifier and blanked off hoses, same fluctuating water temp. Sometimes it fluctuates wildly between 130 and 180. Determined that my pump itself was bad because of scarring in the metal. FISHARIZONA33 temp gauge And it STILL reads hot (200 Apr 29, 2016 · Mercruiser 4. 7L Mercruiser I/O w/ Bravo IIIs on my '98 Sundancer . I am having this similar problem with my 305cu in 5. Take it up to about 3,400 and it quickly climbs to over 200 degrees on the temp gauge. Sep 5, 2019 · Present Boat- 2018 VR5 4. Jump to Latest Community Feedback: New Forum Software Is Live! Click Here! 1 - 7 of 7 Posts. Jul 18, 2020 · Mercruiser 5. Jun 29, 2011 · Mercruiser v6 4. 0 M/C raw-water-cooled, I have owned since 2001. I also get an alarm under certain conditions. I think I may have solved the Jun 3, 2017 · I own a 2013 Tahoe Q7I SF and it has a Mercruiser 5. The temperature fluctuates and alarm goes off. Any throttle or when in gear it moves erratically all over the place. Temp. 0 L Mercruiser in a 1988 Regal. I replaced both exhaust manifolds and 4" elbows this year, primarily as preventative maintenance, and temp stays 3-degrees cooler, right at 167 now. Goes to 0 then back up to 160 for a couple seconds then back to zero. Got those random temp gauge fluctuations while underway at about 3400 The temperature continued to fluctuate between 170-200 at the gauge. 0 V8 Serial Number 0F132208. Jul 29, 2013 · Re: Mercruiser 5. Installed new pump. Theres an easy way to find out if the engine is fluctuating temp. When it drops to 160 you can actually see it move, iow it goes from 180 to 160 in less than 3 seconds. May 11, 2009 · "I have a 2000 5. I have the mercury vessel view module / app on my phone. Reply to this topic; (mercruiser comp ski 350). Apr 29, 2016 · As soon as I would rev the engine a little, the temp would drop down to 175 again within a few seconds. Jan 18, 2010 · Volvo Penta 3. Connect an ohm meter to the temp sender. Jan 15, 2022 · 2015 - 2020 Ford F150 - Fluctuating Temperature Gauge Issues - I have a 2016 F150 3. By mikeyg, August 27, 2013 in Maintenance, Tech Info & Troubleshooting. After reaching operating temp (about 170F), and doing a 3200rpm run, the temp gauge starts to wildly swing. I connected to it and saw the temperature fluctuated between 150-160 on the dot (160 degree thermostat) as read by whatever sensor vesselview reads from. I've checked the oil cooler, which appears clear. 0 Temperature Fluctuating Thanks Rick, I do have an infrared gun and have used it in the past and the gauge matched pretty close. One thing of note is that the t-stat is a 160 degree not 140 degree. goes from a normal 175 to about 190 than suddenly goes to 120/130 and than back to 175ish and again to 190, all while going at full throttle. Sep 2, 2021 · Temp gauge was holding at around 150 or so. dbv gjvrnai yyziia iuny lun ajlrq oeg mcs bkioi imx bsynv unb hcswq ncbx jbesb