xb03fs
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Registered: 05-2010
Posts: 21
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74.2 GPS Loaded Heavy
200 EFI
26 Quad Iv 6100 where the soft limiter is,
Prop even to maybe 1/8 below
ran out of smooth water is reason for not letting it climb more, probably a 3 mile run on the river Playing with the trim
Seemed I need to have it slighly overtrimmed to get to high 60's the a bump or two down and I picked up to the 74
3 people
3 skis set of combos and slalom in the nose
water, soda, and bag of ice in the livewell
full tank of gas
24 V troller, three batteries
anchor
buch of tools
What do you all think?
I think I am going to drop it an 1/8"
I think the 72 run I had the motor too high hence all the slip, but it was easier to drive, which help me get a feel for it.
Here it required more imput and less trim but faster and lower rpms
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Jun/3/2010, 9:27 am
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lilmule
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Registered: 04-2010
Location: Buchanan,Tn
Posts: 201
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Re: 74.2 GPS Loaded Heavy
How deep is prop shaft below the pad.of course be a bit deeper as sking with it.mine is set pad level,run a 27p four blade or a 28 p three,same rpm about 6100 but translates out to 83 and 86 (single load full gas taking it easy add 2mph for hot n heavy)respectively.Slip on mine is about .08,but changes upon prop change.Tilting to much will bring out that common trait of hooking to the right,allisons dont need to be much over nuetral almost flat but slightly tilted rooster tail below motor height,mine is about 1 1/2 ft tall and a long ways strung out behind to the point it looks like nothing but spray low.
Honestly think mine would pull skiers up even with the pad in a heart beat,so you dont need much below unless a stock gearcase.
Two up full load mine will do 80 all day long,then again have an advantage as run OMC.
If you are running a stock gearcase three under can understand a lot of it,get a bobsnosecone,raise another 5 mph is in it.
Despite all I said three up thats faster than most boats with that load.
The reasoning for it running better high is not unusual as alleys like the prop high and actually handle much better as they dislike a prop low and handle like a mac truck when deep.
Its also easier for others to relate to when single loaded or double,doubt if many have run three up with that much gear.
Single load you should bump 80 + and possibly a larger p prop even though you are sking,run up high even a 150 can run a 29p chopper on them when single load.
You might consider a hydraulic jack plate to lower to get up with skiers then raise to gain top end.
Mine is a 200 hp johnson-1.86 gear ratio,custom 15 in lower and a bobs nose cone that titus supposidly touched up.Full bore full tilt, even with the pad 28 psi.
I fish with another on board most of the time other wise id run 29 and 30 p choppers 1 in above the pad,rough water and a double load negating that..Sking one would need a 26 or 27 think you can actually go up one.My own opinion ask Jay
Last edited by lilmule, Jun/5/2010, 2:13 pm
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Jun/5/2010, 1:44 pm
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xb03fs
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Registered: 05-2010
Posts: 21
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Re: 74.2 GPS Loaded Heavy
Dropped it about a quarter, took the skis out and just two aboard, too rough to string it out. Acclerated better, got to 63 pretty quick in a short spot of clean water
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Jun/7/2010, 9:38 am
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