Serial Number # 3B102791
13x24
1:85:1
24P Tempest Plus
Recently received my Triton 18 TRX with 200hp Mercury ProXS. Passed the 2 hour break in and when I try to run open throttle for 1 min I am only getting to 4300 rpms and 50mph. Do I need to get past the 10 hour break in to have it checked on the G3 for demand linear or should I take it in now? Prop to pad is 3”in on a 6 inch manual Jack plate. The hotfoot hits the stopper at the 4300 rpm mark. I know them he engine has alot more in it.
Last edited by acoberhauser@hotmail.com; 10-28-2021 at 06:07 AM.
You need to get it adjusted now, break in requires WOT runs for short periods
2018 TRX 18. 2020 Mercury 200 Pro XS V8
Something is way off. The dealer should have addressed that before you ever took delivery. I would start with the hotfoot stop adjustment.
Also your prop is two sizes too big. You need a 22 tempest.
Make sure the RPM figures are coming from a Smartcraft Instrument (analog instruments are notoriously inaccurate). That being said- those numbers are a believable combination (not an appropriate one, but a believable one).
First place to start is having the Demand Linear and throttle cable (also hotfoot if equipped) checked and verified. You MUST be able to reach 100% demand linear every time the hotfoot or throttle is depressed fully (whether it's fast, slow, up and back down, etc). See the FAQ Section- there's a step-by-step there that may help (keep in mind, some techs would be happy to have it, many may be offended or put-off if you offer it). Either way, that's what needs to happen.
THEN get a suitable propeller. 24P Tempest Plus is going to be too steep for that setup. I agree with Dave- start with a 22P Tempest Plus.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Another vote for a 22 P Tempest Plus or a 24P Bravo FS.
I have both props and they both perform about the same although the Bravo will carry weight better.
2020 Triton 18 TRX
Tournament Fishing Package
2020 Mercury 200 Pro XS V8 Serial # 2B588923
Minn Kota Ultrex 80# I Pilot Link
Hi Jacker EZ 6" Jack Plate
Bravo 1 FS 24 Pitch Prop
Humminbird Helix 7 SI GPS CHIRP G2 Bow
Humminbird Helix 7 CHIRP MEGA GPS DI G3 Console
Trick Step Boarding Steps
RMP Engine Support
Thanks for all the info, all the data provided came from the Vessel View Mobile. Going to bring it up to the dealer to have it tested and will look into getting a different prop.
He has the 1.85 lower not the 1.75TM, and on this rig and engine combo, it is what Triton specify in their standard rigging
Last edited by thommo59; 10-28-2021 at 06:39 PM.
Even with the 1.85 it’s too big of a prop.
Tried to upload the data sheet from Triton that’s recommends a 22 Tempest for the 1.75TM and the 24 Tempest for the 1.85 but I can’t get the file to resize small enough
I'm not sure I would agree with that data, even if it's on a "sheet".
1.75R to 1.85R equates to 200-250 RPM increase. 22 to 24 pitch equates to 300-400 RPM decrease.
Net LOSS of RPM's, on an engine that needed to spin MORE RPM's. For my sometimes feeble mind, this does not compute.
Keep the same prop it had at 1.75R for starters, the 1.85R will raise the engine RPM's. THEN see where it's at.
IMPORTANT: ALL of this is in vain if the engine isn't reaching 100% Demand Linear.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Again thanks for all the info. Taking in in next week to get the demand liner checked and verified. Will work on the other items discussed after. Will update when I get the info back.
Any update on this?
Dropped it off at the dealer today to get looked at. Said it won’t be until next week when they are able to get it done. He did say they are seeing quite a few Tritons and Rangers coming out of the factory that the hot foot is not setup correctly. Was able to track down a 22 P Tempest Plus to test when I get it back.
Got a call from the dealer and boat is ready. It was only getting 75.2% demand linear when they tested it. It is now at 100% and goes back to zero when the hot foot resets. Going to get it back out on the water this Sat and see what the numbers look like.
Last edited by acoberhauser@hotmail.com; 11-11-2021 at 12:57 PM.
Hopefully you meant to say that it is "NOW" at 100%.... if it's really "not" then I wouldn't bother until it's right.Originally Posted by acoberhauser@hotmail.com
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
It was a typo and is at 100%
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Can’t believe so many dealers send out boats and don’t check for 100% throttle. I really think they don’t check anything, just get them out the door to a customer as fast as possible.
Got out on the water today. Top speed this morning was 65.6 MPH which is when it started walking a little bit. That was also with a 22 P Tempest plus and full tank of fuel. I do need to load everything back in the boat, the front was pretty much empty. Need to learn to drive it but glad I was able to get the demand linear worked out. Will start making adjustments to get it all dialed in. Thanks for all the tips and advise!
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