Page 1 of 2 12 LastLast
Results 1 to 20 of 35
  1. #1
    Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114

    Erya Holeshot Cavitation

    New 2019 Erya / 250hp Pro XS Fourstroke / Fury 25P / Slidemaster setup at BCB factory

    I’m getting a very short spurt of cavitation (maybe blowout) during the holeshot. I’m assuming it’s probably a jackplate adjustment that’s needed? Trimmed down to 0 during the process. Any ideas??
    Bass Cat Eyra 2019
    Mercury 250 Pro XS Fourstroke

  2. BBC SPONSOR Bass Cat Boats's Avatar
    Join Date
    Jul 2004
    Location
    Mountain Home
    Posts
    15,070
    #2
    We do not suggest a 25 Propeller on that setup. The propeller is larger and thus is venting. You can plug the PVS holes and restrict the exhaust to reduce venting. If the hole shot is not sufficient and you need more, then start opening the PVS holes with the different plug sizes. We would reduce them all one size and start there

  3. Member
    Join Date
    Sep 2012
    Location
    Jonesville, La.
    Posts
    5,496
    #3
    24 Fury 3 would be the best Prop for that engine rig combo.
    2016 BassCat Pantera II
    Mercury 200 ProXs

  4. Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114
    #4
    Good info...not sure why the boat came with the 25 prop. I will talk to the dealer. Thanks!
    Bass Cat Eyra 2019
    Mercury 250 Pro XS Fourstroke

  5. Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114
    #5
    BCB what prop is recommend for this setup?
    Bass Cat Eyra 2019
    Mercury 250 Pro XS Fourstroke

  6. BBC SPONSOR Bass Cat Boats's Avatar
    Join Date
    Jul 2004
    Location
    Mountain Home
    Posts
    15,070
    #6
    We recommend a 24 Fury and some are going to the Bravo. It is a more expensive propeller also.

  7. Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114
    #7
    Thank you!

  8. Member
    Join Date
    Apr 2014
    Location
    SW, Ohio
    Posts
    17,192
    #8
    bravo is a beast--never seems to loose it's grip at anytime!
    2022 z519 cup 225 merc 4s ser # 3B210484. 2--hds12 live units. 2 poles, atlas plate, ghost, hamby's, active target, merc digital gauges
    2002 basscat pantera 3 (dad bought new) sold 8-2-22
    2000 stratos 20 ss (bought new) 200 hp Rude ficht great boat/motor sold 11-21
    pulled by a 2500HD Denali
    proud dad of an ARMY Captain
    MAGA
    ASE/GM Master tech before tools

  9. Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114
    #9
    Update: I plugged all of the holes on the 25 Fury. Ventilation issue was slightly better but still noticeable. I couldn’t get the RPMs much above 5500. I guess a 24 Fury will be on order. Thanks for the help!
    Bass Cat Eyra 2019
    Mercury 250 Pro XS Fourstroke

  10. Member
    Join Date
    Feb 2014
    Location
    Cape Fair, MO, USA
    Posts
    264
    #10
    Quote Originally Posted by jv83 View Post
    Update: I plugged all of the holes on the 25 Fury. Ventilation issue was slightly better but still noticeable. I couldn’t get the RPMs much above 5500. I guess a 24 Fury will be on order. Thanks for the help!
    A Bobs hydraulic jack plate will help you out a bunch. You raise it to take off and just as the boat breaks over lower the jack plate to prevent blow out. Then raise the plate and trim to your running speed. I have the same boat and motor came with a 25 Fury with no plugs. The exception is I put a Bob's Jack plate on it which allows me to tune the over all running of the boat.. We're turning upwards to around 6000 rpms at 75 mph and it'll beat that if I can ever control the chine walk..
    2019 Bass Cat Eyra
    Mercury 250 Pro SX
    4 Stroke 2B591496


  11. Member
    Join Date
    Jun 2004
    Location
    Baytown Texas
    Posts
    1,090
    #11
    I have a 25 Fury with hydraulic jack plate and yes it will blow out if the engine is too high. Start out high and get on the jack plate to begin lowering as it starts to lay over. You should be able to control the ventilation by adding plugs. If your cavitation is only a second or so I wouldn't worry too much about it.

  12. Member
    Join Date
    Nov 2015
    Location
    Tuscaloosa , AL
    Posts
    379
    #12
    Agree with everything above. I'm on my 3rd BassCat (2nd Eyra). Both my 2018 with 250 ProXS 2-stroke & the new 2020 Eyra with a 250 ProXS 4-stroke will momentarily cavitate during takeoff right as she breaks over. Adding plugs for me just reduced the engine rpm's during the holeshot which kept the boat from launching hard (2-stroke info there, as I haven't tried plugs on the 4-stroke...and probably won't bother trying them). I have done some prop testing though.

    2020 Eyra. Merc 250 ProXS 4-stroke. Air temp 95 degrees. Water temp 87 degrees. Altitude 223'. 3/4 fuel in each tank. Live well empty. 2-people (225 +150 lbs). Ultrex 112, dual front graphs, 8' power poles.
    1) My Ronnie Gilbert 26p Fury 3 --- 77.5mph at 5770rpm. Tons of lift.
    2) Box stock 25p Fury 3--- 77.4mph at 5880rpm. Slightly better holeshot. Noticibly less lift. (Ran solo at 78.5mph---didn't get rpm)
    3) New stock 24p Fury 3----just received yesterday....will do back to back testing soon.
    2020 BassCat Eyra w/Merc v8 Pro XS (2b685615)
    2008 Triton TR196 w/Merc200 (1B505505)
    2024 Havoc Alum Duck boat w/ Mod Mercury 3-cyl 2-stroke
    0T899507 w/1B728726 powerhead (sleeved/ported/welded chambers, mod carbs/tuner &light flywheel)
    Previously owned:
    2018 Eyra w/Merc250 (2b525704)
    2015 PII w/Merc200 (2b115304)
    Brooks tunnel w/Merc 200 carb & CLE l/u motor (A913415)

  13. Member
    Join Date
    Jun 2019
    Location
    Ozark, MO
    Posts
    328
    #13
    I have a 2017 with a 250pro XS. Went thru 4 different props 25 and 26 Fury , a 26 Tempest, and landed on a Bravo XS 27 four blade. Boat had cavitation with all but the Bravo no matter what I did ( Manual Jack plate). Maybe if I had a hydraulic I could have worked it without slipping. The Bravo leaps out of the hole foot to the floor and never have to let off. Great lift and virtually no chine walk as long as I have a passenger or balance the load. Runs 75 all day and I can take my hand off the wheel for 5 sec at WOT. Only thing I’m working on is PtoP to get a little more rpm.

  14. Member
    Join Date
    Nov 2015
    Location
    Tuscaloosa , AL
    Posts
    379
    #14
    Update from 10/1/19 (air temp 101) 1 tank at 75%, other at 50%. Solo test with stock 24p Fury-3.
    ***80.1 mph @6150rpm. Excellent holeshot. 3-4 sec. rpm range during hole shot 3670-3980, vents momentarily to 4050 then grabs again at 3850.

    Original post 9/24/19
    2020 Eyra. Merc 250 ProXS 4-stroke. Air temp 95 degrees. Water temp 87 degrees. Altitude 223'. 3/4 fuel in each tank. Live well empty. 2-people (225 +150 lbs). Ultrex 112, 4-batteries, dual front graphs, 8' power poles.
    1) My Ronnie Gilbert 26p Fury 3 --- 77.5mph at 5770rpm. Tons of lift.
    2) Box stock 25p Fury 3--- 77.4mph at 5880rpm. Slightly better holeshot. Noticibly less lift. (Ran solo at 78.5mph---didn't get rpm)
    3) New stock 24p Fury 3----just received yesterday....will do back to back testing soon.
    Last edited by FastCat04; 10-02-2019 at 06:52 AM.
    2020 BassCat Eyra w/Merc v8 Pro XS (2b685615)
    2008 Triton TR196 w/Merc200 (1B505505)
    2024 Havoc Alum Duck boat w/ Mod Mercury 3-cyl 2-stroke
    0T899507 w/1B728726 powerhead (sleeved/ported/welded chambers, mod carbs/tuner &light flywheel)
    Previously owned:
    2018 Eyra w/Merc250 (2b525704)
    2015 PII w/Merc200 (2b115304)
    Brooks tunnel w/Merc 200 carb & CLE l/u motor (A913415)

  15. Member
    Join Date
    Jun 2018
    Location
    Gallatin TN
    Posts
    114
    #15
    I ended up going back up to the 25p Fury from the 24p. Holeshot slightly slower, but the 250 Merc 4s can turn that 25 with no problem. I think the handling is much better. Top speed north of 80mph at about 6100rpm. Cavitation issue fixed by backing off the throttle just slightly when bow is about to lay down after coming out of the hole. Pretty happy now!
    Bass Cat Eyra 2019
    Mercury 250 Pro XS Fourstroke

  16. Member
    Join Date
    Jul 2010
    Location
    Gilbert, AZ
    Posts
    421
    #16
    Had major cavitation on my 18 Eyra, didn't matter the prop except the Bravo I XS, but used ONE large plug in the Fury and cured it unless have the plate too high.
    2018 BassCat Eyra - 250Pro XS

  17. Member lpugh's Avatar
    Join Date
    May 2009
    Location
    Sacramento Ca
    Posts
    5,164
    #17
    If its not over revving, it is not a problem, partially lifting for a couple of seconds is all it takes to correct it. Motor may be slightly to high as well
    If it is just suddenly jumping up to 56 to 5800 and then hooks up. I call it shifting gears then that's perfect. That is my goal when setting up my boats
    Thank You Leon Pugh

  18. Member Louie's Avatar
    Join Date
    Dec 2009
    Location
    Charlotte, NC
    Posts
    1,060
    #18
    Quote Originally Posted by FastCat04 View Post
    Agree with everything above. I'm on my 3rd BassCat (2nd Eyra). Both my 2018 with 250 ProXS 2-stroke & the new 2020 Eyra with a 250 ProXS 4-stroke will momentarily cavitate during takeoff right as she breaks over. Adding plugs for me just reduced the engine rpm's during the holeshot which kept the boat from launching hard (2-stroke info there, as I haven't tried plugs on the 4-stroke...and probably won't bother trying them). I have done some prop testing though.

    2020 Eyra. Merc 250 ProXS 4-stroke. Air temp 95 degrees. Water temp 87 degrees. Altitude 223'. 3/4 fuel in each tank. Live well empty. 2-people (225 +150 lbs). Ultrex 112, dual front graphs, 8' power poles.
    1) My Ronnie Gilbert 26p Fury 3 --- 77.5mph at 5770rpm. Tons of lift.
    2) Box stock 25p Fury 3--- 77.4mph at 5880rpm. Slightly better holeshot. Noticibly less lift. (Ran solo at 78.5mph---didn't get rpm)
    3) New stock 24p Fury 3----just received yesterday....will do back to back testing soon.
    Bringing this back to the top to see what all props people have tested specifically on the Eyra/ new mercury 4s engines. I keep eye balling the bravo, possibly even the LT as the tube aids in hole shot as well. I'm willing to give up some speed for hole shot and lift. Don we used to talk on face book but I don't see you on there any longer. I sent you a PM.

    As for my current rig 2021/ eyra/ poles/ garmin force/ 4-31 series batteries. With both tanks around 40-50% hole shot is around 6 seconds, lift is fair, I ran it up to 76 with just me in the boat and I want to say rpms were close to 6000. If I tournament load the boat, full fuel, co angler, live wells full, the hole shots around 7-8 seconds (maybe more before she fully breaks over) I have a bobs and have played with it up and down and I would like to have more or less better hole shot and alot more lift at lower cruising speeds 20mph to 45 mph. I run alot of boat traffic and obstacles.
    "the head, the tail, the whole damn thing"

  19. Member
    Join Date
    Oct 2018
    Location
    Arizona
    Posts
    132
    #19
    I have a 2020 Eyra with M4S 250 and F24P, Highest speed for me alone 1/3 tanks empty wells but all compartments full was 77.2mph (removable console was in). I find Hole Shot improves about 1-2 seconds (its noticeable) starting the plate high and then lowering it. I have an Atlas JP, I start at 8 or 9 on the gauge, as the nose starts to pitch down, back begins to rise, i start running the plate down. Find top end is best with the prop buried right where the gauge turns from 2 to 1. I find Hole Shot improves about 1-2 seconds (its noticeable) starting the plate high and then lowering it.

    Am thinking about a Bravo XS 25P for my high altitude/high temp prop, but am happy enough with the 24p, even at 3600' elevation and 95F i can get up in 7-8 seconds and run 75 mph with out much effort.

  20. Member Louie's Avatar
    Join Date
    Dec 2009
    Location
    Charlotte, NC
    Posts
    1,060
    #20
    James_az I was out yesterday and per my buddy Adam's info and from Andrew down at ross.. I tried both their recommended jack plate settings. Adams and I run a bobs, Set it at 2 on the gauge, and drop it as the nose dips the boat gets up pretty well. I had 35% fuel on the right tank and 60% on the left. Which is probably how I will run this boat, it does not like being fully fueled. Nor having the livewells full. Per his instructions the boat go on plane around 5 seconds. Andrew said put it at 3-4 and drop it as the bow dips, its too high at that setting and ventilates like crazy and loses all bite/ propultion. I will probably send a spare prop to be worked by Ronnie and I will probably order a bravo, possibly the LT per Kensaku - Owner of SGD marine in Japan, he said it added alot of lift and hole shot to his Eyra but lake Biwa has heavy mineral content in the water so I'm not sure how that effects their boat performance over there. If I run mine fully loaded/ fuel /co etc... I would say the hole shot is about 7-8 seconds. I have seen 76 in the boat, I would be fine if it would run 75-77 with a 4 blade. Also with that bobs the boat does get alot more lift with the jack plate nearly all the way down, and gets the best speed set around 2 at WOT, but feels like it looses some stability/ rocks when hit by boat waves set that high riding normal speeds.
    "the head, the tail, the whole damn thing"

Page 1 of 2 12 LastLast