Smarty pants, I really could use your help! 350 Mag trouble SOLVED?? MAJOR UPDATE

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  • reneechris14reneechris14 Member Posts: 3,134 ✭✭✭✭✭
    I have Rinda unit I will run data you need my 350s are now running at the top. What do want me to run.
    2005 Rinker FV342  Pawcatuck river,Ct
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  • reneechris14reneechris14 Member Posts: 3,134 ✭✭✭✭✭
    My motors hit 5100 to day ,40 mph ,this is a 15000# boat you need info ill hook you up
    2005 Rinker FV342  Pawcatuck river,Ct
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  • Black_DiamondBlack_Diamond Member Posts: 5,439 ✭✭✭✭✭
    Ras: you prob have the cool fuel Gen 2. Front port side of your engine. Silver thing is the pump. 

    His boost pump was working, it supplies the pressure, the non-working pump is used to pull from the tank and supply the boost pump.  

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • CarsnmorellcCarsnmorellc Member Posts: 230 ✭✭
    What's the technical name of the pump we are speaking about? 
    2001 340 Fiesta Vee 20P Hill Marine and 2 new 6.2 Horizon motors. Whine Down
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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    rasbury said:
    So how did you have such good fuel pressure with no fuel? I don't have cool fuel on my 05 mpi 350...i do have a silver cylinder which I assume is the fuel pump...have not had problems there...yet..
    Look underneath your motor on the port side.   I bet you do have the cool fuel system.  The big silver unit next to the water fuel seperator is just a boost pump.  My main fuel pump is underneath the motor in a black box.
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    reneechris14 said:
    I have Rinda unit I will run data you need my 350s are now running at the top. What do want me to run.
    Thank you @reneechris14


    Will you run at idle for say 20 seconds, then 25% throttle, 50%, throttle, 75% then 100% each for a 20 second run.   This will provide baseline info to share with all members!!   I still look to do more comparisons on mine!
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    edited August 2017
    rasbury said:
    Ps- glad and hope you found the problem..is their an easier sequence of checking to get where you got?
    SUPER EASY>>>>>   


    We all know how to check fuel pump pressure on the rail via the schrader valve.   If you disconnect power to the main pump ( cool fuel pump) and only leave the boost pump running you should see 8 psi of fuel pressure (rated output) when keying on the ignition.  Mine shows 0.  Also, if you have a pressure release valve on your gauge with a hose you can hold that valve down and see the fuel flowing into a container to visually verify the operation in addition to the pump pressure.   

    Another big win was the graduated cylinder test.   I have something going on with the port motor side, this will be next to diagnose.   I am flowing 25GPH less fuel on that side then my Starboard side.   Im guessing i have a cool fuel pump that is failing over there since it is what does the majority of the pumping.   Im told the boost pump is a piston style pump that has the abilty to draw fuel from the fuel tank.  The main fuel pump is a vein style and does not have the abilty to "suck" fuel like the piston style does.  This is the reason for the 2 pumps in series together.
    Post edited by Wildboating on
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    @reneechris14
    If you send me this Rinda file i will convert it to a youtube video for others to use.
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    reneechris14 said:
    My motors hit 5100 to day ,40 mph ,this is a 15000# boat you need info ill hook you up
    What props are you running to achieve 40mph and 5100 rpm?
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • Liberty44140Liberty44140 Member Posts: 4,381 ✭✭✭✭✭
    I am running 22p props and I hit 40-41 mph at right around 5000 rpm (could be a little less rpm and could be a little more on these farias but it's wot). 
    07' Cruisers 390 (Previous Rinker's: 06' 342EC & 01' 310FV)

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  • CaptianDanCaptianDan Member Posts: 94 ✭✭
    Really pleased for you @Wildboating, its like torture when you can't get to the bottom of a long standing issue.  Sounds like your new mechanic really helped and demonstrates that we always need to get the right guy looking at any issue.

    "Pipe Dream"
    2002 Rinker 342 Fiesta Vee
    2 x 350 MAG MPI Horizon Petrol

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  • Handymans342Handymans342 Member Posts: 10,375 ✭✭✭✭✭
    Who makes these junk pumps?
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  • CarsnmorellcCarsnmorellc Member Posts: 230 ✭✭
    @Wildboating what is the actual name of the "lift" pump that failed?
    2001 340 Fiesta Vee 20P Hill Marine and 2 new 6.2 Horizon motors. Whine Down
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  • Dream_InnDream_Inn Member, Moderator Posts: 7,663 mod
    Oh man, that is fantastic news!!!  Now you can get out there and enjoy the rest of the season on the boat!  I think we've all benefited from this post!

    Dream 'Inn III -- 2008 400 Express

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  • Black_DiamondBlack_Diamond Member Posts: 5,439 ✭✭✭✭✭
    The pump by the fuel/water seperator is the boost pump

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    @Carsnmorellc
    i have heard it called the boost pump or lift pump, but like Black_Diamond said it is next to the fuel water separator. 
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • Handymans342Handymans342 Member Posts: 10,375 ✭✭✭✭✭
    Alswagg said:
    Most fuel pumps are either Bosch or Carter brands. Same as what is in your vehicles    
    But no paint
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  • CarsnmorellcCarsnmorellc Member Posts: 230 ✭✭
    Ok so now the real question, how soon can you get the Boost pump on and give her a test run!??
    2001 340 Fiesta Vee 20P Hill Marine and 2 new 6.2 Horizon motors. Whine Down
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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    Well, we ordered one yesterday for Friday delivery.  

    Unfortunately my wife's grandfather whom we cared for passed last night.  Thankfully he passed peacefully and after a full life.  So we need to transport him back to New Orleans for services.  

    It appears testing won't be until late next week at this point.  However, I do need a gimbal bearing replaced and a drive seal done to be "all good" with the boat.  I'm going to see if I can get both drives fully serviced twhile we are traveling.  I had been trying to postpone this as to not loose any boating season.   I have a seasonal tailgate business called Great Lakes Tailgate that consumes my weekends starting at the beginning of September. My boating clock is quickly running out of time.  
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • Handymans342Handymans342 Member Posts: 10,375 ✭✭✭✭✭
    Sorry to hear that.  :(
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  • Black_DiamondBlack_Diamond Member Posts: 5,439 ✭✭✭✭✭
    Sorry to hear of your loss. 

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • randy56randy56 Member Posts: 4,083 ✭✭✭✭✭
    Sorry about your loss, there will be plenty of boating season when you get back.
    Boat Name : 

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    Thanks Guys!  We will all be so fortunate to live into our 90's.

    Just found out we will not be departing now until Monday.  So testing is ON!!!!   I am excited to see what happens.   Looks like i may have drive service lined up for next week as well.  So by the next few weeks I may get to squeeze 1 or 2 weekends out after 3 years of trying before she gets put away.  
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • CarsnmorellcCarsnmorellc Member Posts: 230 ✭✭
    You like just playing with our emotions!  Fingers crossed 
    2001 340 Fiesta Vee 20P Hill Marine and 2 new 6.2 Horizon motors. Whine Down
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  • Dude_HimselfDude_Himself Member Posts: 596 ✭✭✭
    GIVE THE PEOPLE WHAT THEY WANT!!

    I mean, what's going on?  *ears*
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  • Dude_HimselfDude_Himself Member Posts: 596 ✭✭✭
    Presses F5 repeatedly.
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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    I had high hopes.  No change.  
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    Another $500 in the hole
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    Dang..something must be missed along the way...wish I could offer you some advice.
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  • WildboatingWildboating Member Posts: 957 ✭✭✭
    Someone.  Please help.  I'm so exhausted 
    2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2.20:1 w/ 22p 4 x4 props

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