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  1. J

    2019 Z18 W/150 Proxs Four Stroke, Top Speed?

    Only time I saw 60+ on my 2018 Z18 w/150 4S was when it was brand new with no fishing tackle or electronics on it and a Fury 24P prop. Honestly, I just don't think it's a 60 mph boat when loaded.
  2. J

    2019 Z18 W/150 Proxs Four Stroke, Top Speed?

    Tempest 23P 3/4 tank of fuel. Live well empty and just me in the boat.
  3. J

    Fuel Mileage On A Z-18, 150 Four

    Mine was delivered with a Fury 24. It was awful out of the hole but ran much faster midrange and top end. I don't remember how it was vented...I think it was the medium plugs. So, you have a good hole shot with no venting at all? Please describe?
  4. J

    Fuel Mileage On A Z-18, 150 Four

    I put a TS 6" jackplate on mine set to 1 1/2". It didn't help the hole shot or the top end. Actually it probably ran the CG further aft. I experimented quite a bit with props also. The 4 blade has a better hole shot but suffered on top end. It also took a lot of steering inputs with throttle...
  5. J

    Fuel Mileage On A Z-18, 150 Four

    I just converted my trailer to tandem axle. It was so overloaded that one hub actually split. If the 4 stroke 175 had been available when I ordered mine, I'd have it. The 150 is fine after you get out of the hole but the Z18 is tail heavy and needs more horsepower to get it on plane. Especially...
  6. J

    New Nitro Owner

    A 1 1/2" scupper valve in the overflow line will stop the livewell problem. I need some parts for a 2018 tandem axle Z18 trailer but I need a serial number off one. Can anyone help?
  7. J

    Unintended Livewell Fill

    Had the same issue. Dealer went under the floor, beneath the batteries and installed a 1 1/2" scupper valve in the overflow line. It has never filled that way again. It was backfilling through the overflow line every time I dropped off plane.
  8. J

    2019 Merc 150 Pro Xs Prop?

    Copied from the other thread... Today I added the TH Hole Shot plate on my jack plate, put the large (12mm) plugs in the Tempest 23P prop and installed it and took her for a ride. Hole shot was amazing! Just popped right up on plane. Will certainly be a little slower with a passenger and full...
  9. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    I believe you Larry and thanks for all your replies. I just wanted to see if I could find that happy place before I drilled the holes in the foot of my motor. I hear the clamps for the hydrofoil kinda suck. Thanks!!!
  10. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    Today I added the TH Hole Shot plate on my jack plate, put the large (12mm) plugs in the Tempest 23P prop and installed it and took her for a ride. Hole shot was amazing! Just popped right up on plane. Will certainly be a little slower with a passenger and full livewell. That was with me (250...
  11. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    It all seems to come down to weight/drag vs. thrust. Want more speed, add more horses without adding a lot of weight. Mine ran 61 brand new with no rods, no tackle, no electronics and all the other junk we store for a rainy day. I don't run mine at WOT except occasionally. I cruise 4000 to 4500...
  12. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    Nope, 5500 to 5600 at WOT and full trim.
  13. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    OK, Put the Trophy Plus 23P on. It came with the 12mm plugs in it. I tried that and had a lot of prop slip. I changed it to the 7mm small plugs and it bogged down around 3500 RPM. I put the 9mm medium plugs in and it has great power out of the hole, about the same mid range performance as the...
  14. J

    2019 Merc 150 Pro Xs Prop?

    My 2018 Z18/150 4S came with a Fury 24. Hole shot sucked but it ran 61 with a tank of fuel and just me in it. I hung 2 Talons on it and it was REALLY a dog. Nitro sent me a Tempest Plus 22. Better hole shot, top speed 56, but the mid range lagged behind what I wanted. I tried a Tempest Plus...
  15. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    Call me crazy but I ordered a Trophy Plus 23P 4 bladed prop. We'll see what this does for the hole shot and top end. All the literature claims it's the best thing since the jelly worm. I'll know by Saturday...
  16. J

    2018 Z18 W/ 150 4-stroke (won't Get On Plane) Help!!!!

    I'm curious too. My 2018 Z18 with the 150 4s has two Talons on it. It came with the Fury 24. I put a 6" jack plate on it at 3" experimenting with a Tempest 22 and 23 pitch. Still a slow hole shot...agonizingly slow with 2 people and any water in the live well. I also get porposing at anything...
  17. J

    Z7 150 Merc Hard To Plane

    I pulled the plugs out of my 150 4S with 23P Tempest yesterday. Prop blows out at 4000 RPM and cavitates. Gotta go find new plugs now...
  18. J

    New Z18 Owner Question

    It is definitely the overflow for the livewell. They are installing a check valve in that line for me right now to stop water from backflowing into the livewell.
  19. J

    New To The Board.

    Signed up today. 2018 Z18 with 150 Four Stroke I've owned for a year. Tempest 23P tops out at 56 on the GPS. Midrange is awesome. 4000 RPM = 40, 4500 = 45, etc. Running dual 12' Talons and dual Helix 10s and dual consoles. It's in the shop right now having a check valve installed to stop the...
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