4.3 Mercruiser (2010) not able to run at no wake speeds

[Mikos]

Hello,

​I am having trouble with my 2010 Bayliner 215 throttle and shifter. When trying to maneuver slowly in a marina or at a dock I need to engage/disengage the gear box all the time to maintain a really low speed. If I keep it in gear the boat will go at abut 10 mph without applying throttle. I compared that to a friends Bayliner 190 of the same year and his is much more responsive and able to sustain low speeds. Is this just an adjustment to be made or do I have something broken?
​The tech at my marina said it is "just normal" but it does not fee right

Thoughts?

thanks
Mike

 

[Bt Doctur]

what rpm is the motor at

 

[tpenfield]

Yes rpm to go 10 mph would be pretty significant and probably result in very abrupt shifting into gear.

 

[Scott Danforth]

if its idling at 10 mph, its well above 1200 RPM

if this is a carbureted boat, your idle circuit is probably plugged and someone turned the idle speed up, or your throttle cable is sticking

 

[Mikos]

The RPM is around 1100 at that point. And yes it.is carburated. The shift into gear is not super rough just that after it shifts into gear nothing happens until the RPM get to about 1100.

 

[tpenfield]

The RPM is around 1100 at that point. And yes it.is carburated. The shift into gear is not super rough just that after it shifts into gear nothing happens until the RPM get to about 1100.

When the engine is in neutral, What is the rpm?

When you shift into gear, you say nothing happens UNTIL the engine gets to 1100 RPM . . . Does the engine do this by itself, or are you nudging the throttle up a bit?

Just not understanding what you are describing . . . :noidea:

 

[Bondo]

The shift into gear is not super rough just that after it shifts into gear nothing happens until the RPM get to about 1100.

Ayuh,...... Welcome Aboard,..... What's the rpms at Idle,..?? in gear,..?? in neutral,..??

I'd sooner think the prop is turnin' 'n the boat is movin' before ya throttle up to 1100 rpms,....
Yer just not "Feelin' " it,...

As soon as the drive Clunks inta gear, yer Movin',....

 

[wahlejim]

^^^This! If you hear the 'Alpha Clunk' into gear, the prop is turning. You till be moving. It is a boat, not a car. It takes some time for response. Don't consider your friend's boat, it is smaller and will respond better at slower speeds. Unless you know you have the same weight, engine, gear ratio, displacement in the water, and prop, your boat won't feel the same.

If the boat will not go into gear until you are at 1100, than you can start looking at shift cable adjustments. Otherwise, just give it a second to respond and move. That is a lot of boat to move around.

 

[Scott Danforth]

The RPM is around 1100 at that point. And yes it.is carburated. The shift into gear is not super rough just that after it shifts into gear nothing happens until the RPM get to about 1100.

whether you accept it or not your beating your dog clutches to death. idle is supposed to be 650 rpm in gear.

• either your throttle is hanging up
• or someone turned your idle speed up (most likely to band-aid a plugged idle circuit)