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Thread: Allison Jack Plate
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05-23-2015, 06:44 PM #1
Allison Jack Plate
Well, got the new toy mounted today. Thanks again Don! Find out how she performs tomorrow.
Anybody had experience with one on a 15 Baja? Total of 4 1/2" setback.
Raised the motor 1/2". Propshaft's now bout 5" below the keel. Good place to start?
How soon til I need LWP?'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
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05-24-2015, 08:00 AM #2Screaming And Flying!
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Its still pretty deep... Make sure you have a trustworthy h2o pressure gauge.. Incrementally bring the engine up until you begin to see erratic pressure readings (sucking air), then lower back down incrementally until the pick-ups are pulling in no air.. If you want that highest setting then you can plug the top one or two intake holes, or then go to a nosecone and keep going up..
It may start to slip when coming out of the hole, over revving a bit till the bow lays over and then it will hook-up and move on just fineKevin Kiser
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05-24-2015, 09:47 AM #3
You should be able to come up till the top of the lower unit barrel is even with the keel.
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05-24-2015, 09:47 PM #4
I dunno Fred. Not sure how much I wanna raise it before adding a low water pickup. If you lay a straight edge on the bottom I've already got the top two intake holes exposed?
'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP
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05-25-2015, 05:40 AM #5
Water rises as it exits the rear of the hull.Looks like you have a couple inches at least.
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05-25-2015, 02:23 PM #6'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP
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05-26-2015, 02:52 AM #75000 RPM
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With the current gearcase/pickups you could easily run it 1 - 1 1/2" below plank (center of prop shaft to running plank).
Looks way, way deep at the moment!
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05-26-2015, 08:06 AM #8
Time to get a LWP on that thing and let her eat. I think a lot of your handling issues will clear up when you get it set up better.
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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05-26-2015, 04:08 PM #9
Thanks guys. Ya I know it needs to come up. Bob's cone is on the list. Anyplace cheaper to get one than buying direct? They want a lil under $200.
'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP
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05-26-2015, 05:16 PM #10
I think I saw one sitting at Rich Junkers shop. Thinks its a TH Marine nosecone. Give him a call. He might make you a deal if you have him weld it.
13' Biel tunnel AKA "Flight Risk"
13" Modified Yamaha V4 - 101 mph
21' Paramount
Mercury 300 Promax
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05-29-2015, 06:55 PM #11
'Preciate the heads up Chris. But think I'm gonna hold out for a Bob's.
In the mean time I went diggin through Ernie's junk pile and came up with this:
Figgered a pressure gauge'd be a good idea. Idles at 3 psi on muffs. Is that okay/accurate? Ain't stuck it in the water yet?'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP
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05-29-2015, 06:58 PM #12Screaming And Flying!
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3lbs is plenty on the hose.. Don't rev it up hard on the muffs though..
Kevin Kiser
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05-29-2015, 07:35 PM #13
In post #1 it looks like the bottom of the jackplate os sticking out from the transom a bit....???
If ya dont want to go with a lwp mite think of cilling in the top 2 holes and opening up the bottom ones and feathering the water into them..
My 2 cents
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05-29-2015, 07:35 PM #14
Thanks for confirming that Ted. Also been told I oughta get 10 - 12 psi at idle with it in the water. And 20 mebbe 25 at a slow cruise. Do you concur?
'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP
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05-29-2015, 07:50 PM #15'71 Glastron V153 - Composite rebuild - Unceremoniously wrecked
'81 Baja 15 SS - "nine-paged" '77 140
'81 Carlson C500 Metric - Currently in foster care
'70 something Speedcraft - Allison 16R clone - Undergoing restoration
'79 Carlson CVZ 19 - Far back burner
WALK TALL AND CARRY A BIG BILGE PUMP