84 Scarab Renovation (ongoing)
#612
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Joined: Aug 2007
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From: Sandown, NH - Sebago Lake Region, ME
Okay so I only have about 30 minutes of seat time with the new setup
To get on plane is interesting..... I haven't had a chance to try different things but basically, tabs down, drives down, as you throttle past 1200 both drives just break free! I bring the motors to 3800-4000 and leave it there. It takes about 10 seconds before the boat climbs up on the water and then the drives grab, when the grab it pulls the motors down about 800rpm. At this point I tab up some and then start to pull the drives up. The conditions were really rough this weekend and it seemed to want to porpoise really bad without some tab! The boat used to want to porpoise with the TRS's so I could never really pull the drives up much but I never needed tab to compensate Hopefully this weekend I will get some real seat time and start to get a feel for what works best for getting on plane
Once on plane the boat feels really loose. I image this is due to the lack of junk hanging down below the hull! Tabs have a effect as do small movements on the drives! I also learned that you can't take a corner (even a large slow one) with putting the drives back on. If you don't the drive on the outside of the corner breaks free and the motor starts freewheeling.
With my TRS setup it was sort of set it and forget it, this setup seems like it needs more hand holding, again this is first impressions so this weekend should be interesting!
To get on plane is interesting..... I haven't had a chance to try different things but basically, tabs down, drives down, as you throttle past 1200 both drives just break free! I bring the motors to 3800-4000 and leave it there. It takes about 10 seconds before the boat climbs up on the water and then the drives grab, when the grab it pulls the motors down about 800rpm. At this point I tab up some and then start to pull the drives up. The conditions were really rough this weekend and it seemed to want to porpoise really bad without some tab! The boat used to want to porpoise with the TRS's so I could never really pull the drives up much but I never needed tab to compensate Hopefully this weekend I will get some real seat time and start to get a feel for what works best for getting on plane
Once on plane the boat feels really loose. I image this is due to the lack of junk hanging down below the hull! Tabs have a effect as do small movements on the drives! I also learned that you can't take a corner (even a large slow one) with putting the drives back on. If you don't the drive on the outside of the corner breaks free and the motor starts freewheeling.
With my TRS setup it was sort of set it and forget it, this setup seems like it needs more hand holding, again this is first impressions so this weekend should be interesting!
#613
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Joined: May 2010
Posts: 996
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From: Red Oak, Texas
It will all become second nature. When the first drive grabs I throttle it up, I never let it drop a bunch of RPM. Seems to shorten the time. Porpoising, We blueprinted the bottom of mine years ago and that seemed to help. Mid range I run my tabs neutral (same plane as boat bottom) and adjust with drives. WOT is tabs up, drives up until it cavitates a little and back down to RPM max. Mark you indicator, that's your benchmark. Mark your tabs at neutral. Helps to set up the boat.
It's definitely a different feel, more of an "on top of the water" thing. Chop the throttle at speed and it takes some time to "slide" to a stop. Bunch of fun though.
It's definitely a different feel, more of an "on top of the water" thing. Chop the throttle at speed and it takes some time to "slide" to a stop. Bunch of fun though.
#614
Dan M, is the bottom consistant through most of the scarab line as far as rocker goes? If not, would certain sizes work better with surface drives?
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Straight bottoms and flat decks
Straight bottoms and flat decks
Last edited by bck; 07-06-2016 at 04:59 PM.
#617
And my 30 had hook in it.
#618
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Posts: 2,960
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From: Sandown, NH - Sebago Lake Region, ME
#619
#620
Seems a little strange you would have porpoising being that you have a surface drive a standard drive i get. Essentially the more pitch and blades you have the more the transon wants to lift up. Take a 6 foot level or something very straight and lay it up next to the hull to see if it is straight as rookie suggest you do not want have a hook in the back part of the hull. As i am sure you are aware
are you spinning the props in or out.
are you spinning the props in or out.





