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what rpm do you cruise at
#11730167
07/19/16 02:24 PM
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Joined: Oct 2012
Posts: 1,925
smooth move
OP
Extreme Angler
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OP
Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
my engine was carboned up and the tech told me i wasn't running it hard enough. it's a f 200 in line yamaha. out of curiosity, i called yamaha tech services and they told me the same thing. i'm running a 20p 3 blade prop and getting around 52 to 5300 rpm wot. he said i should be getting 6000 rpm at wot and that i was over propped. i have a 20p 4 blade that will rev up a little higher, guess i'll switch props. what do you cruise at?
es le bon ton roulet
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Re: what rpm do you cruise at
[Re: smooth move]
#11730182
07/19/16 02:31 PM
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Joined: Feb 2006
Posts: 3,774
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,774 |
I run 6000 all the time on my old Merc Black Max 150, still all original after 36 years! It hates cruising under 5700 rpm.
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: what rpm do you cruise at
[Re: smooth move]
#11730501
07/19/16 04:58 PM
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Joined: Mar 2007
Posts: 16,339
forkduc
TFF Guru
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TFF Guru
Joined: Mar 2007
Posts: 16,339 |
4500 FX21 250SHO But make sure you run it WOT for a mile or more sometime during the day!
Last edited by forkduc; 07/22/16 06:52 PM.
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Re: what rpm do you cruise at
[Re: smooth move]
#11732131
07/20/16 12:09 PM
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Joined: Nov 2014
Posts: 23,428
SteezMacQueen
TFF Guru
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TFF Guru
Joined: Nov 2014
Posts: 23,428 |
Eat. Sleep. Fish.
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Re: what rpm do you cruise at
[Re: smooth move]
#11732216
07/20/16 01:01 PM
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Joined: Dec 2014
Posts: 1,665
Muzzlebrake
Extreme Angler
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Extreme Angler
Joined: Dec 2014
Posts: 1,665 |
My Merc EFI 150 2.5L redlines at 5600. Seems my motor has a sweet spot right about 4800 to 5200 where it runs the smoothest. I do know that extended idle like trolling and running structure scan will eventually foul the plugs. 2 stroke motors like to be run hard but not over the limits. The faster you can run it without over heating and dropping water pressure the better it will be is what I am told.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!
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Re: what rpm do you cruise at
[Re: smooth move]
#11732292
07/20/16 01:44 PM
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Joined: Mar 2015
Posts: 1,192
Anchorman
Extreme Angler
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Extreme Angler
Joined: Mar 2015
Posts: 1,192 |
You can run it as slow and easy as you want. Just blow it out good (wot) every so often. I never ran my boats hard. I like to cruise 45 mph or so. But the boat will tell you it's sweet spot. I always take it to wot before heading to the ramp. I never had a fouling issue.
If it ain't yours don't mess with it! Need a friendly place to talk hunting? www.talkhunting.com
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Re: what rpm do you cruise at
[Re: smooth move]
#11732692
07/20/16 05:02 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
TFF Guru
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TFF Guru
Joined: Oct 2004
Posts: 38,822 |
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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Re: what rpm do you cruise at
[Re: smooth move]
#11732704
07/20/16 05:09 PM
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Joined: Feb 2006
Posts: 3,774
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,774 |
The motor should be propped to run the max rpm for that motor at WOT, then run it WOT fairly often to clean out the carbon. Its also a good idea to run Ring Free or Seafoam at least every other tank no matter how old the motor is.
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: what rpm do you cruise at
[Re: smooth move]
#11732721
07/20/16 05:20 PM
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Joined: Apr 2004
Posts: 14,087
Stump jumper
TFF Guru
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TFF Guru
Joined: Apr 2004
Posts: 14,087 |
5000 TO 5400 with my v175
2200 Bay Champ/200 Mercury Optimax 2017 Tundra TSS 4x4 Crewmax 5.7L
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Re: what rpm do you cruise at
[Re: smooth move]
#11736613
07/22/16 05:37 PM
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Joined: Aug 2012
Posts: 3,541
DCmac
TFF Team Angler
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TFF Team Angler
Joined: Aug 2012
Posts: 3,541 |
I never paid any attention to it. I guesstimate maybe 3000-3500? Being a pokey old faht, as soon as I get on plane I throttle down to just stay on plane.
Fishing, a man knows a serenity of soul and peace of mind that he finds in doing nothing else, and it makes no difference whether or not he catches anything. The mind of a true fisherman is not on petty subjects.
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Re: what rpm do you cruise at
[Re: smooth move]
#11736750
07/22/16 06:47 PM
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Joined: Jun 2012
Posts: 635
El Skeeter
Pro Angler
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Pro Angler
Joined: Jun 2012
Posts: 635 |
Yamaha HPDI 250, 25T 1, around 4000 after getting to first spot at WOT, Also WOT to ramp at day's end. Tournament day WOT all day. FYI 65-69 mph at 5000-5200rpm which according to YAMAHA is within its recommended 45-5500 WOT RPM chart. Hopefully you'll solve your problem, with the input on this site I'm sure you will.
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Re: what rpm do you cruise at
[Re: smooth move]
#11737097
07/22/16 10:13 PM
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Joined: Oct 2012
Posts: 1,925
smooth move
OP
Extreme Angler
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OP
Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
well, i got the boat back today and put my 4 blade 20p prop on. took it out for a run and the best ratio i could get at WOT was 5100 rpm and 48 mph. will try again tomorrow with the 3 blade 20p prop.
es le bon ton roulet
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Re: what rpm do you cruise at
[Re: smooth move]
#11737109
07/22/16 10:25 PM
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Joined: Feb 2006
Posts: 3,774
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,774 |
I'm thinking a 17p may be better, there is about 200 rpm per inch of pitch difference. If you were closer I have a 17p Vengeance for sale that you could try.
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: what rpm do you cruise at
[Re: bronco71]
#11737303
07/23/16 12:42 AM
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Joined: Oct 2012
Posts: 1,925
smooth move
OP
Extreme Angler
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OP
Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
I'm thinking a 17p may be better, there is about 200 rpm per inch of pitch difference. If you were closer I have a 17p Vengeance for sale that you could try. thanks. i've got a 3/18p quicksilver that needs a new hub and a yamaha spline. i'll get er done and see how that works.
es le bon ton roulet
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Re: what rpm do you cruise at
[Re: bronco71]
#11737924
07/23/16 03:25 PM
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Joined: Oct 2012
Posts: 1,925
smooth move
OP
Extreme Angler
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OP
Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
I'm thinking a 17p may be better, there is about 200 rpm per inch of pitch difference. If you were closer I have a 17p Vengeance for sale that you could try. ran my 3/20p today. 5200/51mph.
es le bon ton roulet
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