Results 1 to 8 of 8
  1. #1
    Join Date
    May 2018
    Location
    Waynesville, Ohio
    Posts
    234

    Default Normal Engine Temp Raptor 400

    Over the weekend I noticed something that I have never really paid attention to before. I have a 2018 Craz with the Raptor 400 in it. The normal operating temp when cruising around 25 mph, surfing, wakeboarding etc. Seems to be just above 160. However, we were on a larger lake and cruising around 35 mph (probably around 5000 rpm) for a few minutes. The temp got up to 179. As I backed down in speed, the temp would drop to mid 170's, but never back into the 160's until I got down to around 25 mph. Is that normal? I thought that seemed pretty hot. I replace the impeller every year, so it only has about 40 hrs on it. I am going to check anti-freeze to make sure it isn't low, but it was at the low line "cold" before we left for the trip. Just curious if everyone else sees that higher temp at higher speeds.

    2018 Moomba Craz
    6.2L Raptor 400
    6 Pump Ballast, Autowake 2.0, Flow 2.0 Surf System
    OJ 15x13 Wake Prop
    Digital Cruise Pro 3 (paddle wheel)
    Wetsounds Rev 10's

    2005 Supra Launch 22SSV - Sold

  2. #2
    Join Date
    Aug 2011
    Location
    Commerce Lake, MI
    Posts
    1,833

    Default

    When I surf it will get up close to 180. It then cools to 160-165 after I stop and idle a few seconds. Not an issue. If you start creeping north of 190 Iíd worry.


    Sent from my iPhone using Tapatalk
    2017 Moomba Craz

  3. #3
    Join Date
    May 2018
    Posts
    1,211

    Default

    Also depends on lake temp. But yeah 170 is still plenty cool.


    Sent from my iPhone using Tapatalk
    2018 Supra SA 400
    Michigan

  4. #4
    Join Date
    May 2018
    Location
    Waynesville, Ohio
    Posts
    234

    Default

    Cool. I wasnít too worried when it came right back down, but I had never really seen it get that high before (or I hadnít paid attention at least). All my other boats ran much cooler.

    Lake temp was about 87.....it was nice!


    Sent from my iPhone using Tapatalk

    2018 Moomba Craz
    6.2L Raptor 400
    6 Pump Ballast, Autowake 2.0, Flow 2.0 Surf System
    OJ 15x13 Wake Prop
    Digital Cruise Pro 3 (paddle wheel)
    Wetsounds Rev 10's

    2005 Supra Launch 22SSV - Sold

  5. #5
    Join Date
    May 2018
    Posts
    1,211

    Default

    Quote Originally Posted by jcarter20 View Post
    Cool. I wasnít too worried when it came right back down, but I had never really seen it get that high before (or I hadnít paid attention at least). All my other boats ran much cooler.

    Lake temp was about 87.....it was nice!


    Sent from my iPhone using Tapatalk
    Same engine in a truck application runs probably 210f.

    Cooler isnít always better to make HP.

    GM LS engines prefer low 200ís for peak performance.




    Sent from my iPhone using Tapatalk
    2018 Supra SA 400
    Michigan

  6. #6
    Join Date
    Oct 2016
    Location
    Wisconsin
    Posts
    214

    Default

    mine floats between normal 167 and have seen it up to 173.
    2019 Mondo

  7. #7
    Join Date
    May 2018
    Location
    Waynesville, Ohio
    Posts
    234

    Default

    Yeah must be normal. My antifreeze level is normal. I guess if you run it near wide open it will heat up pretty good.


    Sent from my iPhone using Tapatalk

    2018 Moomba Craz
    6.2L Raptor 400
    6 Pump Ballast, Autowake 2.0, Flow 2.0 Surf System
    OJ 15x13 Wake Prop
    Digital Cruise Pro 3 (paddle wheel)
    Wetsounds Rev 10's

    2005 Supra Launch 22SSV - Sold

  8. #8
    Join Date
    Oct 2018
    Posts
    14

    Default

    Mine is usually around 165, hottest I've ever noticed was about 169 (used in central Florida, so water and air temps max out around 90 and 95 respectively).
    2017 Moomba Helix

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •