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What idle speed is too high for a Bravo

Old 06-18-2020, 10:27 AM
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Default What idle speed is too high for a Bravo

I am having some issues getting my idle down below 900-1000 RPM. I think I have something binding in the throttle plate - maybe needs new bushings. It runs and idles fine, and I can press down on the throttle lever at the carb and it will idle down to around 800 RPM where I want it, but as soon as I use the stick to rev it up at all, when I pull the stick down it stays around 1000 RPM. Obviously I am going to keep working to correct this issue, but how much of a chance am I taking with it damaging the clutches on my drive if I shift at 1000 RPM?
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Old 06-18-2020, 11:09 AM
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I wouldn't go more than 900 RPM max. Anything over that and you start to risk damage to the clutch.
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Old 06-18-2020, 11:16 AM
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Originally Posted by Budman II View Post
I am having some issues getting my idle down below 900-1000 RPM. I think I have something binding in the throttle plate - maybe needs new bushings. It runs and idles fine, and I can press down on the throttle lever at the carb and it will idle down to around 800 RPM where I want it, but as soon as I use the stick to rev it up at all, when I pull the stick down it stays around 1000 RPM. Obviously I am going to keep working to correct this issue, but how much of a chance am I taking with it damaging the clutches on my drive if I shift at 1000 RPM?
Agree with TomZ. I also set my carb's up by disconnecting Throttle Cables and getting it set/idling where I want. Then adjust the cable barrels to sit loosely on the lever. My first click on the sticks has minimal influence on the RPM's which I find comfortable for operation.
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Old 06-18-2020, 11:44 AM
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Check your secondaries.
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Old 06-18-2020, 12:42 PM
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I set idle with cable disconnected, then when idle all set, i install and set cable with a tiny bit of tension trying to close throttle harder.
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Old 06-18-2020, 01:52 PM
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Originally Posted by liberator221 View Post
Check your secondaries.
Do you think it might be the secondary linkage binding, or maybe the secondary throttle plates being open a little?
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Old 06-18-2020, 01:55 PM
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I am going to take the advice and disconnect the linkage. I can press down on it and get it to sit on the throttle stop, and it idles fine at around 800. I guess I need to determine if the problem is in the carb linkage or the boat throttle linkage. Thanks for the replies - I will post an update.
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Old 06-18-2020, 03:39 PM
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The throttle lever is resistant to move from carb idle speed screw. Throttle lever also has a stop and cable is solid.Gas pedal in a car has no issue moving and stranded cable sometimes has slack and can bend with no effort. Thus why you must follow procedures most of us have detailed.

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Old 06-18-2020, 04:36 PM
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Have you verified the butterflies are centered in their bores at idle? That can resist/prevent the throttle from coming all the way down to idle.
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Old 06-18-2020, 04:48 PM
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Originally Posted by zz28zz View Post
Have you verified the butterflies are centered in their bores at idle? That can resist/prevent the throttle from coming all the way down to idle.
I'll check that tonight. I would expect that to be more of an issue if the butterflies were removed from the shafts, and I don't think they ever have on this carb.
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