What could cause this ??
08-25-2005, 06:20 PM
#1
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What could cause this ??
Problem ,, the boats a 83 -34- Scarab III... with 502 motors with 177 blowers fresh TRS drives..... Borg warner trans spinnin 27'' pitch Hydromotive Q-IV's ..the problem is that outta the hole it has no problems... but around 4200 + rpm when the blowers are kickin in .. the starbaord prop spins loose,..engine rpm increases to limit.. the boat lists... if I back off a few 100 rpm the prop hooks back up.... I experanced this with different props too.. I have 27 and 28's ...it used to do it with just the 28'' .... the 27's had no prob...now it happens with both...WTF??? ANY IDEAS ?? 
08-25-2005, 06:57 PM
#2
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Re: What could cause this ??
Could be a fitting on the hull that is disturbing the water to the prop and causing cavitation. Got any strainers, speedo pickups, etc on that side?
08-25-2005, 07:02 PM
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Re: What could cause this ??
Yeah, I too would look for some kind of problem on or with the hull causing turbulence forward of the outdrives or something on the outdrive gearcases themselves. But your B/W's could be needing clutch pacs. Check the fluid. "If it's brown, Tear it down" --- Jer
Last edited by jpclear; 08-25-2005 at 07:06 PM. Reason: add
08-26-2005, 07:29 AM
#4
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Re: What could cause this ??
Nothing changed on the boat... solid hubs on props... and it dose it with the 27'' and 28'' pitch props... Like I said the 27's used to hold fine, now they are not.... too much stern lift with the q-IV's..??? should I try bravo's again???... or I still suspect the trans???? 
08-26-2005, 09:27 AM
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Re: What could cause this ??
I'd say trans. Buddy had the exact same symptoms in an older Checkmate with TRS's. I think I remember him saying a shifter cable adjustment fixed it.
08-26-2005, 03:22 PM
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Re: What could cause this ??
I ran today...topped off fluids.... twice they broke loose twice they did not...WTF.... the casing vents do blow alittle fluid...I've heard that is a sign of a plugged screen...I may nurse them till fall and yank them when I put the boat away...I may call Marc @ Bamm ...see what he says...
