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  1. #1
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    high RPM low speed Merc XR6 150, prop issue?

    I just bought a 2003 Triton Tr-185 DC with a Merc xr6 150 has a manual jack plate and a 3 blade 21" pitch prop. I can only get 47 mph (gps) and is running high rpm's abour 6300 to 6500. just looking for some input if I should have a 23" pitch or higher prop, or lower the jack plate??? Thanks

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  3. Member SkidMark's Avatar
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    #2
    I would think a 23-24 Tempest Plus. WAAAAY too many rpms to worry about lowering JP that much. Try a 23 then worry about the JP.

  4. 1/2 of ' team catfish ' ol man river's Avatar
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    #3
    if youre hitting 6500 rpm, id go with a 24 tempest..thats waaay to many rpms….a 24 shold take you to approx 58-5900 rpms with a lot more speed….get the rpms close first, then fine tune it with the jackplate...

    Those who don't learn from history, are doomed to repeat it.

  5. Member
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    #4
    thanks for the input I have been getting the same response from alot of people...

  6. Member
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    #5
    I have the same boat minus the jackplate. I am running a 23" pitch prop on my motor (Merc. xr6 150hp). I am turning about 5400 rpm's and running in the low 60's. I wouldnt lower the jackplate until I tried a different prop. JMO.
    "Montani semper liberi"

  7. Member
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    #6
    I bet your tech is off but you do need to get a 23 Tempest Plus. Does the XR6 have a rev limiter? I would think that would not allow you to hit that high?

  8. Member
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    #7
    thanks everyone got a 23" and now getting 59 MPH @ around 5500 rpms not a Tempest but it was $250 less and I get to try it out for 2 weeks to see if I like it. It is a turning point any feed back on that brand?

  9. Member marshall256's Avatar
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    #8
    Yes...23" Mercury Tempest as recommended above. The Tempest has PVS plugs that will aid in tuning your hole shot...plus it's a prop that has been used extensively on this size rig with good results.

  10. Member
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    #9
    Quote Originally Posted by dblume View Post
    I bet your tech is off but you do need to get a 23 Tempest Plus. Does the XR6 have a rev limiter? I would think that would not allow you to hit that high?
    24 tempest plus was fastest on my TR186 with 150...62-63 gps consistant

  11. Member
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    #10
    I have a 03' TR185 with with a 150 XR6. With 6" JP and the prop shaft about 2-3/4 below the pad I'm turning a 24p Tempest plus 5850-5900 and getting about 62 gps.. incredible holeshot to. so I'm wanting to try a 26p-27p tempest to see if I can get more top end or at least a 25p tempest has anyone tryed this prop on a TR185?

  12. Member
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    #11
    I used to have a Tr-186 w the same motor and mine was a 23 tempest + and i'd hit 61-62 at about 5900 rpm's. Your rpm's are extremely too high to be getting only 47mph. I'd recommend a new prop. Lowering the JP at those rpm's would pretty much be useless. Just my two cents.

  13. Member MercuryMan's Avatar
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    #12
    I think he should be measuring his prop to pad and what is the water pressure?