Formula not up to speed. Help...
02-02-2010 | 01:23 PM
#31
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From: Merritt Island, FL
02-02-2010 | 03:29 PM
#32
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
If the coupler is bad at high rpm, how do you even get on plane?
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Some people are like Slinkies - Not really good for anything, but they
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Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
02-02-2010 | 09:27 PM
#33
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Joined: Aug 2007
Posts: 337
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From: Waterford, MI
If it's a bravo coupler they don't slip. It is a all or nothing. You would see some shavings around it. here's two pictures, one was trashed, prop won't turn at all. The second one is close to failing but you could not tell at all. Worked just like a new one, but not for long.
You can see if the shaft turns it will trash the coupler, no way could it turn the prop and grab at all.
You can see if the shaft turns it will trash the coupler, no way could it turn the prop and grab at all.
02-02-2010 | 09:59 PM
#34
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From: Grosse Pointe Farms, MI
Ha... I was thinking the same thing!
02-03-2010 | 08:39 AM
#37
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I can easily reach the 5,000 rpm range on either engine without any hesitation (misfires, lack of fuel, etc). Seems like the power plants are generating the proper HP.
It almost feels like an automatic transmission in a car that is low on fluid(slippage). If the boat is running 35 and you back off the port side throttle you do not feel a loss of speed but if back off the starboard side you notice a drastic reduction of speed. On the other hand if you are running 4,000 rpms on both engines and push both throttles equally forward the starboard will move up to 4,500 while the port runs up to 5,200 so I have to back off the port to keep from red lining.
Hope that is as clear as mud...
Thanks guys
It almost feels like an automatic transmission in a car that is low on fluid(slippage). If the boat is running 35 and you back off the port side throttle you do not feel a loss of speed but if back off the starboard side you notice a drastic reduction of speed. On the other hand if you are running 4,000 rpms on both engines and push both throttles equally forward the starboard will move up to 4,500 while the port runs up to 5,200 so I have to back off the port to keep from red lining.
Hope that is as clear as mud...
Thanks guys
02-03-2010 | 10:48 AM
#39
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
Sounds like the port side is your problem, no speed loss and rpms raise faster.
I'd be looking for slippage somewhere. If the drives were a different ratio, I'd think the rpm difference would be across the board. But not sure if 1 would carry the other???
Try swapping the props.
Possibly try getting on plain with just 1 motor. Not actually doing that, but making 1 side work harder, so if there is something slipping, you'd think it would show up then.
I'd be looking for slippage somewhere. If the drives were a different ratio, I'd think the rpm difference would be across the board. But not sure if 1 would carry the other???
Try swapping the props.
Possibly try getting on plain with just 1 motor. Not actually doing that, but making 1 side work harder, so if there is something slipping, you'd think it would show up then.
__________________
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Last edited by US1 Fountain; 02-03-2010 at 10:53 AM.
02-03-2010 | 12:37 PM
#40
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Joined: Apr 2004
Posts: 249
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From: Northwood, NH
I can easily reach the 5,000 rpm range on either engine without any hesitation (misfires, lack of fuel, etc). Seems like the power plants are generating the proper HP.
It almost feels like an automatic transmission in a car that is low on fluid(slippage). If the boat is running 35 and you back off the port side throttle you do not feel a loss of speed but if back off the starboard side you notice a drastic reduction of speed. On the other hand if you are running 4,000 rpms on both engines and push both throttles equally forward the starboard will move up to 4,500 while the port runs up to 5,200 so I have to back off the port to keep from red lining.
Hope that is as clear as mud...
Thanks guys
It almost feels like an automatic transmission in a car that is low on fluid(slippage). If the boat is running 35 and you back off the port side throttle you do not feel a loss of speed but if back off the starboard side you notice a drastic reduction of speed. On the other hand if you are running 4,000 rpms on both engines and push both throttles equally forward the starboard will move up to 4,500 while the port runs up to 5,200 so I have to back off the port to keep from red lining.
Hope that is as clear as mud...
Thanks guys
