Starting newly rebuilt motor

Discussion in 'Classic Sea Rays' started by dmnolan, Aug 17, 2019.

  1. dmnolan

    dmnolan Active Member

    130
    Apr 11, 2017
    Massachusetts/ Rhode Island
    1976 Sea Ray SRV240 Weekender
    Currently 351Windsor 233 HP
    getting ready to fire up the new motor.
    It’s got gas and spark and is ready to go.

    Question.

    Block is dry, should I fill water through the t stat housing before firing up? Or will the impeller and muffs get it done quick enough?

    Thanks
     
    Handsome Transom likes this.
  2. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    impeller is good enough. Did you prime your oil system ?
     
    susanandlance likes this.
  3. Ottawamerc

    Ottawamerc Member

    68
    Mar 23, 2016
    Kemptville
    1987 model on a Karavan tri axle trailer pulled by a 2016 F250 7.2L XLT
    7.4 Mercruiser
    What scoflaw said, also if its a older tappet cam shaft make sure you use the proper oil ie: racing oil and follow cam shaft manufactures instructions on break in or else it will possibly round off a lobe or 2 in short order. If its a newer roller style cam then fire away and go boating!:D
     
    susanandlance likes this.
  4. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    Be more concerned by pre-oiling the motor before firing it up
     
  5. susanandlance

    susanandlance Well-Known Member PLATINUM Sponsor

    Feb 10, 2011
    Florida
    2007 Sea Ray 36 Sedan Bridge
    8.1 mercruisers
    +1 on what scoflaw said, impeller is plenty, maybe bump starter several times but don't let it start to get oil up in the internals
     
  6. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Who built the engine?
     
  7. dmnolan

    dmnolan Active Member

    130
    Apr 11, 2017
    Massachusetts/ Rhode Island
    1976 Sea Ray SRV240 Weekender
    Currently 351Windsor 233 HP
    Thanks all. Motor rebuilt by Adams Performance. Shawn is a friend of mine with hundreds of rebuilds through his shop.

    Yes pre priming oil through the motor spinning pump with drill. Making lots of pressure!

    Ok on the water question, thank you.

    I know the motor was rebuilt with all the correct break in lube etc.
    the oil in at the moment was put in/ recommended by builder.

    Has a process to follow for initial run followed by fresh oil and filter.

    Thanks again!!
     
  8. Handsome Transom

    Handsome Transom Active Member GOLD Sponsor

    462
    Jan 26, 2018
    Penetanguishene Ontario Canada
    1989 SeaRay Sundancer 268 454 Bravo
    454 Mercruiser bravo drive
    How many hours breakin does he reccomend and at what rpm before oil and filter change ? Is there any retourqe to be done after or during break in period ?
    Just curiosity
     
  9. dmnolan

    dmnolan Active Member

    130
    Apr 11, 2017
    Massachusetts/ Rhode Island
    1976 Sea Ray SRV240 Weekender
    Currently 351Windsor 233 HP
    Initial breaking is just 20 minutes at 2000 rpm.
    This as iunderstand it is for the cam lobes and ring/ cylinder surfaces.

    Also getting the build lubes flushed out of system.

    Have not walked through the next step requirements for use/ breaking. I have a new SEI which has some guidelines for the first few hours as far as % of full peer and shifts in/out of gear.

    Will match that need up with his reco for first hours under power.

    Not aware of any retourque needs but will ask!
     
    Handsome Transom likes this.
  10. Strecker25

    Strecker25 Well-Known Member

    Nov 20, 2014
    Rochester, NY
    1998 290 Sundancer
    Twin 5.7EFI/Alphas, Kohler 4kw
    I retightened all the worm clamps after 3 hours or so and again at 10 on our rebuild. Coolant and exhaust hoses especially, they loosened up a bit

    I check them one or twice a month as well

    Merc recommends retorquing the manifold and riser fasteners after the first run and 10 hours I believe
     
    techmitch likes this.
  11. techmitch

    techmitch Well-Known Member SILVER Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's

    "Retorquing the manifold and riser fasteners after the first run and 10 hours"
    +1
     
  12. dmnolan

    dmnolan Active Member

    130
    Apr 11, 2017
    Massachusetts/ Rhode Island
    1976 Sea Ray SRV240 Weekender
    Currently 351Windsor 233 HP
    Thanks for the retorque info. Will definitely do this.
     
  13. dmnolan

    dmnolan Active Member

    130
    Apr 11, 2017
    Massachusetts/ Rhode Island
    1976 Sea Ray SRV240 Weekender
    Currently 351Windsor 233 HP
    Start up went well.
    20 minutes at 2000 rpm
    65+ oil pressure
    190 ish on water temp.

    Thanks for all the input.
     

    Attached Files:

  14. Ottawamerc

    Ottawamerc Member

    68
    Mar 23, 2016
    Kemptville
    1987 model on a Karavan tri axle trailer pulled by a 2016 F250 7.2L XLT
    7.4 Mercruiser
    It's hard on fuel!!!! lol Congrats on a successful start up now go enjoy!
     
    dmnolan and Handsome Transom like this.

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