Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

Collapse

Private Messages

We are aware of a current issue where your messages screen does not properly load and we are working on a fix.

In the interim, you can access you messages by navigating to this link: https://forums.iboats.com/privatemessage/notification

Apologies for the inconvenience.
See more
See less

89 force 125 slow throttle response

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • 89 force 125 slow throttle response

    I just acquired a 89 Bayliner Capri 19ft with a 89 Force 125. The boat sat for over a year but ran before then, how well it ran is unknown. I changed plugs and installed a tell tail and put it in the water yesterday. It idles great, starts right up, and runs smooth. The only problem is that it is slow to reach full rpm, it takes a good 20 seconds or more to reach 4200 rpm. 4200rpm is all I could get her to go as well. It doesn't spit or sputter at all it sounds great, it just creeps up to full throttle and won't reach full rpm. I put on a buddies Michigan prop that is 13.125x15 when the original prop is 13.5x15 but I would think the smaller prop would spin faster.

    Thanks for any help you folks can provide.
    89 Force 125, 19ft Bayliner Capri

  • #2
    Could my problem be the timing advance is wrong causing the lack of power and slow acceleration?
    89 Force 125, 19ft Bayliner Capri

    Comment


    • #3
      First do a compression test. Then Clean the carbs if compression is good

      Comment


      • #4
        The timing would not change out of it self, but if someone messed with it or changed the trigger......yes.

        Your propellers has just a different diameter 13,125 vs 13,5, the pitch is still the same 15.
        It is the pitch that affect the rpm, 1 inch up lower the rpm by150- 200 and vise versa.

        Does the butterflies opens up fully at WOT?

        Comment


        • #5
          Check the compression and do a spark test.
          Those OK?? then read the top 3-4 posts and find the post from FrankA about doing a linc and sync.
          Check linkage for full throttle.

          At idle or under acceleration, does it spit fuel out the front of the carbs?

          What's the speed and what size prop do you have?
          The 15 is for a pontoon or a heavy boat.


          Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.
          ​Tools to make my life easier: Battery tester, die grinder, temp.gun, compression tester, DVA meter.

          In Scenic , Beautiful San Sebastian by the sea Florida

          88 Bayliner 21CC 2001 Mercury 225 HP EFI

          PLEASE,NO PERSONAL MESSAGES IF THE QUESTION CAN BE ASKED ON THE OPEN FORUM

          Comment


          • #6
            When I changed plugs I had spark on all 4, and it runs to smooth to me missing on a cylinder. The carb covers are oily and the foam on the hood is soaked behind the carb so I will have to check for fuel spitting out of the carbs. I could only get up to 23 mph by GPS at 4200 rpm. The 13.125x15 prop is what was standard on the boat and my buddy had it new laying in his garage so I'm not out any money to change to a 13.5x17. I will check timing to make sure no one messed with it and hook up the hose and check for bad reed valves spitting fuel back through the carb this week.
            89 Force 125, 19ft Bayliner Capri

            Comment


            • #7
              Where are the results from a compression test ?------They run very nicely on 3 of 4 cylinders.-----And does spark jump a gap of at least 3/8" on all leads , yes or no.-----Some simple trouble shooting get you positive results.

              Comment


              • #8
                If the comp is low on 1 cyl they don't run good.

                15p should make that motor run at 5900.

                You can send the hull ID to Bayliner and they can tell you what came stock on your boat.
                I'm pretty sure it came with a 17 or 19p.

                If the foams oily? It could have come apart and blocked the air intake?
                The glue holding the foam lets loose and the foam can fall off(happened to me)and block the carbs.


                Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.
                ​Tools to make my life easier: Battery tester, die grinder, temp.gun, compression tester, DVA meter.

                In Scenic , Beautiful San Sebastian by the sea Florida

                88 Bayliner 21CC 2001 Mercury 225 HP EFI

                PLEASE,NO PERSONAL MESSAGES IF THE QUESTION CAN BE ASKED ON THE OPEN FORUM

                Comment


                • #9
                  All the foam looks in intact, not to say some turned to powder and got sucked in. I'll have compression test numbers tomorrow night and will be doing a link a sync if they are good.
                  89 Force 125, 19ft Bayliner Capri

                  Comment


                  • #10
                    Originally posted by jerryjerry05 View Post

                    You can send the hull ID to Bayliner and they can tell you what came stock on your boat.
                    I'm pretty sure it came with a 17 or 19p
                    Here's a link for that;https://bayliner.com/contact-us/ OR https://bayliner.com/past-model-specs/

                    However.....I did have to call them to get my info (360) 435-8957
                    Last edited by may the force be with you; April 16th, 2019, 09:49 AM.
                    working on 1990 force 90 horsepower Engine serial. 17523 Engine model. 906X90B

                    Comment


                    • #11
                      Compression test all at 125psi. No spark in hole 2. Swapped coil feed power 1 and 2 and coil 2 still would not spark with tested good power supply and and 1 still had spark. This tells me that my CD box is good and coil 2 is bad. Now I have blue coils, can I put the black ones on or do I have to find blue ones?
                      89 Force 125, 19ft Bayliner Capri

                      Comment


                      • #12
                        So it ran quite nice and smooth on 3 of 4 cylinders.----That is why I urge folks to do some testing !

                        Comment


                        • #13
                          Turns out while my buddy and I tested for spark the first time he was not grounding the plugs. I was in the boat doing things and cranking and he just dangled them all and grounded one at a time to look for spark. He probably saw spark but testing 3 and 4 killed the coil. I have to say im still blown away they run so even with a dead miss. I am deisle mechanic, I work on Cat, Cummins and Detroit. When those have a miss I can tell right away. This two stroke stuff is all new to me. My question now is will this coil I linked to work. I have found used coils for half the price but that seems like a risk.
                          Keep your Chrysler marine engine in top shape with this quality ignition coil. Includes mounting brackets and coil wire. In stock & ships same day!
                          89 Force 125, 19ft Bayliner Capri

                          Comment


                          • #14
                            Yes that is the coil which replaces both the black and blue coils for Prestolite ignition systems.

                            Comment


                            • #15
                              Sign up today
                              leaky Upper Crankshaft seal can cause poor acceleration

                              Comment

                              Working...
                              X