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Scott 852 and lsa

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Scott 852 and lsa

Postby Channonmanuel » Wed Jul 01, 2015 8:24 am

Just curious if anyone else here is running lsa and 852 combo, I'm having cavitation issues on the hole shot im running a 19 pro and 19 std with a 111 insert. Just curious if it's my boats problem or the pumps problem. I want my boat set up so o can utilize all my power. Anyone else running this combo and cavitating?
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Re: Scott 852 and lsa

Postby rockchuckar » Wed Jul 01, 2015 9:53 am

If you are running a stomp grate then that could be the problem. If it has been damaged in anyway ( you guys can be very hard on equipment) then it will not close properly allowing water to spill out the back thus letting the pump cavitate.
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Re: Scott 852 and lsa

Postby Channonmanuel » Wed Jul 01, 2015 10:15 am

I am forsure hard on equipment. This is not a new problem with my boat tho, i have a few tests I'm going to be doing to figure out what's going on. Hopeful tomorrow I can get it into the water with no intake grate. And then do some testing with a modified stomp grate. Might make my 13 bar grate a 7, if that's what it takes to get water into this thing.
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Re: Scott 852 and lsa

Postby rockchuckar » Wed Jul 01, 2015 1:29 pm

Absolutely DO NOT run it without a grate. The design of the grate helps load and hold water into the suction housing not to mention keeping large objects from damaging the interior of the pump. Removing bars will also allow too large of material to be pulled into the pump possibly doing severe damage.
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Re: Scott 852 and lsa

Postby Channonmanuel » Wed Jul 01, 2015 8:20 pm

I'm going to have the boat out at the brazeau dam this weekend so I'll just do some testing with my modified grate and see if i can make it work better. Until I hear from others with same set up, there has to be a bunch of them on this forum
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Re: Scott 852 and lsa

Postby Tuchodi51 » Wed Jul 01, 2015 11:34 pm

I have a 19' with the same set up, on hard acceleration I spin my pump out, have from day one brand new. I'm going to swap to twin 19 pros and a 110 insert , get more water in it. I've talked to a couple guys who really like that combo
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Re: Scott 852 and lsa

Postby Channonmanuel » Thu Jul 02, 2015 6:26 am

Mine is also in a 19' I ran the 2, 19 pros last year and lost so much mid range pull and top end just wasn't happy with the way it worked, what rpm are you pulling at wot
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Re: Scott 852 and lsa

Postby Tuchodi51 » Fri Jul 03, 2015 5:53 pm

I can't get to WOT, my boat porpoises too much once you get up past 4000 rpm. Have shims just haven't put them in yet.
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Re: Scott 852 and lsa

Postby ''dig'n it'' » Sat Jul 04, 2015 4:51 pm

You might think this sounds undoable but it worked for me when I was diagnosing pump issues with my 773. If you can no longer increase the impeller size you have to nozzle down to check this I removed my nozzle and lined it with strips of gorilla tape the length of the nozzle till I couldn't spin the pump out. It took approximately 1.5 mm thickness to achieve then installed a corresponding nozzle size. This was a deflector type nozzle, it might be a little more difficult to attach the tape where the flow of water wont get behind it in an insert able nozzle but gorilla tape is pretty sticky and may work for a short experimental run if you lap it right.
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Re: Scott 852 and lsa

Postby Channonmanuel » Mon Jul 06, 2015 2:37 pm

Tuchodi51 wrote:I can't get to WOT, my boat porpoises too much once you get up past 4000 rpm. Have shims just haven't put them in yet.


Sounds like we have the exact same boat lol. Mine was so bad at first it would almost bounce you out of the boat. Brought it back to Steve and he gave me the shims. Diffidently a must have in that boat. I don't understand how the boats with Hamiltons don't pourpose at all. I never got to test my new grate but am going to install it this evening and test tomorrow in Devon
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Re: Scott 852 and lsa

Postby Denali » Mon Jul 06, 2015 3:53 pm

Are they not water tested before they are delivered to the customer? If so should they not have fixed the issue before you guys got your new boats?
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Re: Scott 852 and lsa

Postby Channonmanuel » Mon Jul 06, 2015 11:19 pm

They only pourpose in deep water, less then 2.5 feet runs perfectly fine
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Re: Scott 852 and lsa

Postby rockchuckar » Tue Jul 07, 2015 1:20 pm

Does the boat porpoise in all nozzle positions or only when trimmed all the way up ?
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Re: Scott 852 and lsa

Postby Channonmanuel » Tue Jul 07, 2015 4:10 pm

rockchuckar wrote:Does the boat porpoise in all nozzle positions or only when trimmed all the way up ?


In all positions without shims under the teflon. With 2 3/8 shims like a foot long it will only purpose if nozel is pointed up. As for the spinning out issue my new grate can take it right to 100 percent without spinning. Only issue I'm having now is my stomp grate gets pulled down at 44-46 mph and slows the boat way down. Just need to fix this and I'll have a pretty decent grate finally.
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Re: Scott 852 and lsa

Postby rockchuckar » Tue Jul 07, 2015 5:39 pm

Sounds like you have it figured out now. I thought the slipping was due to the grate you had and it sounds like the porpoising issue is in the hull/Teflon.
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Re: Scott 852 and lsa

Postby Channonmanuel » Tue Jul 07, 2015 7:11 pm

If you punch it with the 111 insert it will wrap the rev limiter twice and with a 107 it holds no problem. Both are way better then before. I couldn't get more then half throttle from a dead stop
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Re: Scott 852 and lsa

Postby Tuchodi51 » Tue Jul 07, 2015 10:56 pm

How was your cruising speed affected by the twin 19 pros? ( lower rpm to stay on step?) I'm not too worried about losing top end speed, I'm more of a pack a load and get up quick then cruise at low speed to hunt kinda guy. Don't think I could ever open up my intake, I run through way too much shallow water
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Re: Scott 852 and lsa

Postby Channonmanuel » Tue Jul 07, 2015 11:17 pm

The only change By having 2 19 pros was you could hammer down from a dead stop. The crushing speed stayed pretty much the same. And lost 2-3 mph on the top. And you loose all that mid range pull. Right now when your doing like 25mph and hammer it it pulls really hard and with the 2 19 pros is way more gradual. I never opened my intake up at all. I also run way to much gravel to have a bigger grate. I modified some small things after a few more days of water testing I'll let you know what I did. Now that I have my pump hooking up from a dead stop I'm 100 percent sure that the 19pro and 19std is the way to go with this set up. And I ran the 2 19 pros for prob 30-35 hours last year. Steve lent me the impeller and i had to pay for a full rebuild when it went back lol
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Re: Scott 852 and lsa

Postby Tuchodi51 » Wed Jul 08, 2015 11:27 pm

Ah , I misunderstood. Definitely would appreciate you sharing any thing you figure out. Can't seem to find any time to tinker with the boats. Sadly When I get time to go ,I never have time to tinker and adjust
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Re: Scott 852 and lsa

Postby Tuchodi51 » Wed Mar 23, 2016 5:20 pm

Any updates ? Getting time to get mine water ready
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