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07 5.0 GL - Are carbs really THAT inconvenient?

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  • 07 5.0 GL - Are carbs really THAT inconvenient?

    We've found a decent boat at a good price but it has a Volvo 5.0 GL. Our last I/O was an MPI so I have no point of reference for dealing with a carbureted engine. Are they THAT inconvenient?

    I understand all the differences, maintenance, how to start etc. Just concerned that we launch at a very busy public dock often and also off a beach in the summer. Neither ideal for warm up. We are concerned that we wont have any warm up time and don't want to be dealing with it stalling out while trying to get out of the way.

  • #2
    Nope. A properly turned carb will start perfectly and idle just fine every time. I've got a '99 GL 5.0 and it runs perfectly. I get in the boat and the wife backs the trailer down. I pump the throttle twice and start it. I leave the throttle control arm fwd (in neutral) at about the 11:45 position which puts the rpms at about 1200. Leave it there for about 30 seconds while I un-crank the boat off the trailer and by the time I actually push the boat off the trailer with my hands and get back to the pilot's seat, it's warm enough to put the throttle control in neutral and let it idle at 650 rpms.
    Nothing wrong with carbs.
    1999 Chris Craft 200 BR
    Volvo Penta 5.0 / SX

    Comment


    • #3
      Carb'ed engines are fine. I've had both carb'd and MPI . . . the both types started fine.
      Best regards, Ted . . . . Cape Cod, MA

      Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
      Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

      My Boating Web Pages: http://www.tpenfield.com

      Member of the Month - February 2013

      Comment


      • #4
        Originally posted by Augoose View Post
        it's warm enough to put the throttle control in neutral and let it idle at 650 rpms.
        When you say this, you mean you can putter away from the dock at this point?

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        • #5
          Yes you can leave the dock at this point. If you like the boat don't kept a carb scare you away. Easy to fix with simple hand tools vs hooking up an mpi to the diagnostic. In 25 years on last boat I cleaned and rebuilt the carb only twice.

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          • #6
            Its no problem and they are super easy to rebuild if you are not sure of its condition.

            Comment


            • #7
              Originally posted by void7910 View Post

              When you say this, you mean you can putter away from the dock at this point?
              Absolutely. It will idle on its own at 650, or motor away just barely in gear, with no problems.
              1999 Chris Craft 200 BR
              Volvo Penta 5.0 / SX

              Comment


              • #8
                Originally posted by Augoose View Post

                Absolutely. It will idle on its own at 650, or motor away just barely in gear, with no problems.
                Me too . . . other than running the engine for about 30 seconds, then you are good to go. The engine should not stall, if it is running properly.
                Best regards, Ted . . . . Cape Cod, MA

                Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                My Boating Web Pages: http://www.tpenfield.com

                Member of the Month - February 2013

                Comment


                • #9
                  a properly maintained carburetor will run nearly as flawlessly as EFI - both will require about 30 seconds to warm at the dock
                  a properly maintained carbureted motor will burn the same amount of fuel as EFI
                  both carbureted and EFI if poorly maintained and neglected will fail
                  a carbureted motor is easier to repair than EFI (and significantly less expensive)
                  a carbureted motor is only a problem to those people who never drove a carbureted vehicle or that do not run outdoor power equipment and do not understand pumping the throttle to prime the motor and set the choke

                  EFI shines when you drive from Naples Florida to Denver Colorado and want to use the same boat. Here a carb needs to be re-tuned, where EFI adapts to the change in barometric pressure (altitude)
                  1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - http://forums.iboats.com/forum/owner...988-rogue-2420

                  Past Boats
                  1970 Wooster Hellion - Merc 9.8
                  2002 SeaRay 190BR - 5.0 - A1G2 - "Cheasheads in Paradise"
                  1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                  What’s behind you doesn’t matter.Enzo Ferrari

                  Comment


                  • #10
                    Keep in mind there are certain things that need to be right for a carb to allow the engine to run right:
                    ​basic choke adjustment (it should close almost all the way on a cold engine)
                    ​vaccum break also called choke pull off--this is a vacuum operated diaphragm that will via a linkage pull the choke plate open slightly so the engine gets enough air to keep running
                    ​operator follows correct procedure: before starting, open throttle all the way (this allows choke plate to close), pumps throttle 2-3x, this allows accel pump to squirt out a bit of gas to help starting, then the operator has to set the throttle setting manually, this sets the fast idle position (about 1/4 forward) with the shift system disengaged (some handles pull out to do this , some you push in a button on the lever to do this). Then crank it over with the starter.

                    ​We all had cars back in the day, that were exactly the same as this, except that there was a fast idle cam that set the fast idle automatically when the choke closed.
                    ​And, we tended to like or dislike our carbed cars based on how well they started cold. We had a '72 Chevy 350 with a Rochester 2bbl that was balky during cold starts (probably because the mechanics did not know how to properly adjust the well type or divorced choke used then) and a '75 Olds 350 with a Q-Jet that was a good cold starter.

                    ​If your carb is dirty, or mal-adjusted or needs a rebuild, then it will probably act up most during cold starts, because of the difficulty in atomizing fuel in a cold engine.

                    ​If you run old boats like many here do, carbs are much easier to deal with. Why, well you can still get them rebuilt, you can buy brand new Marine Holleys or Edelbrock 1409s and there are no EFI control units that are no longer available when the boat gets to be 15--20 years old to stop you. I'll take a carb, and a points distributor, over No Longer Available or NLA electronic control units any day.
                    1988 Four Winns 200 Horizon
                    4.3 OMC Cobra

                    98 Jeep Grand Cherokee 4.0 Selectrac
                    07 Jeep Grand Cherokee Limited 5.7 Quadradrive II

                    "While air doesn't freeze....rust never sleeps"

                    Comment


                    • #11
                      Sign up today
                      How long of a drive from home to boat ramp?
                      I usually fire mine up at home to make sure starter works, alternator works, carburetor works, etc.
                      This way carb is at proper fuel level later.

                      Most of the boat ramps I use have a way for me to use lines to get my boat out of the ramp to a safe area where I can run the engine up for warming.
                      At other ramps, I idle up high for a minute tops. Then idle out to deeper water and warm up.
                      In colder weather, I stall the engine a couple of times (operator error) so I do not move far from the ramp until temperature gauge starts claiming above ambient.

                      Also keep in mind, your fellow boaters will understand you may need a couple of minutes to get launched.
                      Dennis
                      20' 1987 Renken Cuddy Cabin
                      AQ131C 270 drive
                      Southern NJ

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