Formula not up to speed. Help...
02-01-2010, 02:34 PM
#23
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Location: EASTON MA.
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Bottom of boat is very clean. Up to about 4,000 rpm, throttle is in same position for both engines. When you push up on both throttle levers at same time the port engine revs up to about 5300 and starboard only to about 4700. So you have to back off the port engine throttle to bring it back to 4700 but does not seem like the boat slows down that much.
BTW, thanks for all the attempts so far.
BTW, thanks for all the attempts so far.
02-01-2010, 04:32 PM
#25
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ditto. I had a 21p mirage on my boat for a few minutes after i got my new power in it. the pvs caps were missing and it would get on plane and it would slip when i cracked power to it. it was the incorrect prop i just wanted to see what it would do. i woud switch to known good props and then if that does not work check timing and swap the carbs from engine to engin to eliminate that concern. the beauty of having two engines is that they are great for diagnostics. the ultimate donor.
02-02-2010, 12:29 PM
#26
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We put the drive in forward gear and attempted to turn the prop ccw. Prop would not turn.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
02-02-2010, 12:42 PM
#27
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We put the drive in forward gear and attempted to turn the prop ccw. Prop would not turn.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
02-02-2010, 12:43 PM
#28
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We put the drive in forward gear and attempted to turn the prop ccw. Prop would not turn.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
You can see if the shaft turns it will trash the coupler, no way could it turn the prop and grab at all.
Last edited by Wildman_grafix; 02-02-2010 at 01:22 PM.
02-02-2010, 01:11 PM
#29
Charter Member # 55
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We put the drive in forward gear and attempted to turn the prop ccw. Prop would not turn.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
Unfortunately the boat is currently on the lift having some touchup paint work being done. And I cannot put it back on water until this weekend.
I have a boat mechanic from a local shop telling me that it is the engine coupler failing. He says that Friday he will pull the engine, replace the coupler and if it does not solve the problem, I owe him nothing. He is very confident in his ability so I guess we will see what happens this weekend.
02-02-2010, 01:16 PM
#30
Charter Member # 55
Charter Member
Things that need to be done.......................
Verify tach accuracy and speed accuracy
Check timing on both engines
Try a known good set of props
What are the drive gear ratios????
The boat should run about 40mph at around 3000 rpms
Verify tach accuracy and speed accuracy
Check timing on both engines
Try a known good set of props
What are the drive gear ratios????
The boat should run about 40mph at around 3000 rpms
