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Dec 30th, 2023
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 Throttle Question
#9190339
08/02/13 08:17 PM
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Joined: Nov 2010
Posts: 288
Slab_Rookie
OP
Angler
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OP
Angler
Joined: Nov 2010
Posts: 288 |
Second day with the new boat and I've got a question on throttle response. After I push forward out of neutral and I'm in the forward gear, which is about the 9 o'clock position, I get no throttle response until I'm at the 12 o'clock. Going forward through the rpms the engine is touchy, meaning small changes cause big rpm jumps. Coming down from top rpm around 7000 everything is totally different. As I descend through the rpms everything feels right. I get an equal deceleration for equal movement of the throttle. I notice that the location of the throttle does not equate to the same rpms going up as it does coming down from top rpm.
Is this normal?
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Re: Throttle Question
[Re: Slab_Rookie]
#9190505
08/02/13 09:02 PM
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Joined: Jul 2011
Posts: 5,431
Dubee
TFF Celebrity
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TFF Celebrity
Joined: Jul 2011
Posts: 5,431 |
I want to know what motor you are spinning 7 grand
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Re: Throttle Question
[Re: Slab_Rookie]
#9190640
08/02/13 09:37 PM
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Joined: Sep 2012
Posts: 626
nolte_martin
Pro Angler
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Pro Angler
Joined: Sep 2012
Posts: 626 |
^^this and is sounds like the throttle cable is out of adjustment or just wore out
marine mechanic at lake tyler if you need any work done
(786)387-9610
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Re: Throttle Question
[Re: Slab_Rookie]
#9190956
08/02/13 10:58 PM
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Joined: Oct 2005
Posts: 20,755
kingdad101
TFF Guru
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TFF Guru
Joined: Oct 2005
Posts: 20,755 |
Second day with the new boat and I've got a question on throttle response. After I push forward out of neutral and I'm in the forward gear, which is about the 9 o'clock position, I get no throttle response until I'm at the 12 o'clock. Going forward through the rpms the engine is touchy, meaning small changes cause big rpm jumps. Coming down from top rpm around 7000 everything is totally different. As I descend through the rpms everything feels right. I get an equal deceleration for equal movement of the throttle. I notice that the location of the throttle does not equate to the same rpms going up as it does coming down from top rpm.
Is this normal? yes but you are going to mess your dog clutch up..SLAM it all the way forward.. get on plane, then throttle back like you do coming off plane..I'm also wondering about the 7k's
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Re: Throttle Question
[Re: kingdad101]
#9191218
08/03/13 12:11 AM
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Joined: Nov 2010
Posts: 288
Slab_Rookie
OP
Angler
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OP
Angler
Joined: Nov 2010
Posts: 288 |
60hp Mercury FourStroke Bigfoot
About the 7k's question. I'm totally confused now. This engine has onboard over-rev protection. Mercury specs it's open throttle at 6000rpm. Does this mean my tach is off?
As to slamming it forward this is a pontoon so there's no real point to attempting to plane it. Though at open throttle it almost acts like it could. Meaning its the only time the trim actually makes a noticeable effect on the bow.
Thanks for the replies btw.
Last edited by Slab_Rookie; 08/03/13 12:12 AM.
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Re: Throttle Question
[Re: Slab_Rookie]
#9191446
08/03/13 01:32 AM
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Joined: Sep 2012
Posts: 626
nolte_martin
Pro Angler
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Pro Angler
Joined: Sep 2012
Posts: 626 |
he doesn't mean slam it wide open from neutral just when you put it in gear dont ease the shifter just shove it forward till you have it in gear
as for rpms you need to get a bigger pitch prop the engine I believe it does have an over rev protection but it is not ment to be used you need to prop it so you cant turn more than 6000 rpms when you are loaded how you are planning on using it
ie how many people, stuff, fuel, beer, and whatever else is going to be on the boat
marine mechanic at lake tyler if you need any work done
(786)387-9610
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Re: Throttle Question
[Re: Slab_Rookie]
#9192078
08/03/13 08:59 AM
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Joined: Sep 2008
Posts: 121,182
hopalong
Pescador Loco
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Pescador Loco
Joined: Sep 2008
Posts: 121,182 |
if the rpm are jumping up then coming back down as you throttle up your prop is slipping, this is probably why you are seeing 7k on the tach. you need a prop with more pitch more than likely. does it start to blow out as you are trying to get on plane? after on plane does it do it intermittently and in turns? you are pushing a lot of weight with a little engine, get with steve and get it propped right. www.stevescustomprops.com
" Hop, set the hook"!
hopalong 99,999
TexDawg 99,999
FJB! not my president by a long shot!
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479
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Re: Throttle Question
[Re: Slab_Rookie]
#9192341
08/03/13 01:47 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Just worked on a 2006 pontoon with same motor. was having rpm problems and found the blow-out ring was not installed when owner installed a new prop. These motors are real touchy on the prop you put on them. Have tag right there on the motor warning about using correct prop.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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Re: Throttle Question
[Re: gary purdy]
#9216759
08/10/13 06:12 PM
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Joined: Nov 2010
Posts: 288
Slab_Rookie
OP
Angler
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OP
Angler
Joined: Nov 2010
Posts: 288 |
Just got it back from the shop. Tach was not calibrated correctly. No over speed incidents indicated on the computer. Thanks for the red flags on this!
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