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Jan 23rd, 2013
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running wot #12411887
09/03/17 02:07 AM
09/03/17 02:07 AM
Joined: Jul 2008
Posts: 3,007
Abbott, TX
J
joho5 Offline OP
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joho5  Offline OP
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Joined: Jul 2008
Posts: 3,007
Abbott, TX
Is it healthy to run your boat at WOT? Or better to find a "cruising speed"?

thanks

Re: running wot [Re: joho5] #12411893
09/03/17 02:12 AM
09/03/17 02:12 AM
Joined: Aug 2011
Posts: 2,847
Austin, Tx
B
Bob Landry Offline
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Bob Landry  Offline
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Joined: Aug 2011
Posts: 2,847
Austin, Tx
Do you drive your car with the pedal on the floor?


2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115

Bitter Gun Owner
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Re: running wot [Re: Bob Landry] #12411907
09/03/17 02:19 AM
09/03/17 02:19 AM
Joined: Jul 2008
Posts: 3,007
Abbott, TX
J
joho5 Offline OP
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joho5  Offline OP
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Abbott, TX
Originally Posted By: Bob Landry
Do you drive your car with the pedal on the floor?


no but my car is not a two stroke thats setup with drag like a boat. Cars have momentum that aid them and not 2 stroke motors. So i dont know if its a fair comparison.

Re: running wot [Re: joho5] #12412086
09/03/17 11:12 AM
09/03/17 11:12 AM
Joined: Mar 2015
Posts: 4,053
Jack County
T
TCK73 Offline
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TCK73  Offline
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Jack County
I have a 1982 Johnson 15 hp that has been run WOT most every trip for all the trip and somehow it has never failed. Now, my Yammy SHO gets run WOT for short periods every now and then. I usually run it about 4700 or so and cruise. I can't see much good running an engine at 100% all the time even though that little Johnson has lived thru it. You mentioned drag, and it made me thInk of my airplane which has drag all the time and I cruise with it at 65% unless I am in a hurry and then it's 75%. There are those that say 100% on an outboard is fine, but I personally don't see where that is benefifial. As long as the engine is running hard enough to keep the plugs clean, I think you should be fine, and your saving fuel as well.

Re: running wot [Re: TCK73] #12412172
09/03/17 12:50 PM
09/03/17 12:50 PM
Joined: Jul 2008
Posts: 3,007
Abbott, TX
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joho5 Offline OP
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joho5  Offline OP
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Abbott, TX
Originally Posted By: TCK73
I have a 1982 Johnson 15 hp that has been run WOT most every trip for all the trip and somehow it has never failed. Now, my Yammy SHO gets run WOT for short periods every now and then. I usually run it about 4700 or so and cruise. I can't see much good running an engine at 100% all the time even though that little Johnson has lived thru it. You mentioned drag, and it made me thInk of my airplane which has drag all the time and I cruise with it at 65% unless I am in a hurry and then it's 75%. There are those that say 100% on an outboard is fine, but I personally don't see where that is benefifial. As long as the engine is running hard enough to keep the plugs clean, I think you should be fine, and your saving fuel as well.


I think you are spot on. Just didn't know theory on 2 cycle engines and running them open. I think of a weed eater and how hard we run those things.

Re: running wot [Re: joho5] #12412177
09/03/17 12:57 PM
09/03/17 12:57 PM
Joined: Dec 2014
Posts: 1,664
Euless
M
Muzzlebrake Offline
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Muzzlebrake  Offline
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Posts: 1,664
Euless
2 stokes generally need to be run pretty hard to keep carbon blasted out. Prolonged lugging a 2 stroke is more harmful than good long WOT runs. I see no good reason to run a 2 stroke WOT 100% of the time but may be less harmful than operating a 4 stroke that way. 4 strokes are a different animal and running in the sweet spot which might be 60 to 80% of max rpm is fine as is extended low rpm operation. Too many moving mechanical parts in a 4 stroke and much higher compression to constantly run at WOT unless it's an all out built racing motor and there probably ain't no warranty on it anyway.

Last edited by Muzzlebrake; 09/03/17 12:58 PM.

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!

Re: running wot [Re: joho5] #12412332
09/03/17 03:14 PM
09/03/17 03:14 PM
Joined: Jul 2012
Posts: 1,265
Hill Country
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boocat Offline
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Hill Country
Yeah, I was thinking FAST cruise rpm would around 75-80% of wot.

Re: running wot [Re: TCK73] #12412354
09/03/17 03:36 PM
09/03/17 03:36 PM
Joined: Mar 2007
Posts: 12,317
Plano,Texas
F
forkduc Offline
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forkduc  Offline
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Joined: Mar 2007
Posts: 12,317
Plano,Texas
I run WOT to get on plane and then back off to 5000RPM on my 250 SHO. When lake is smooth,I'll run WOT for 10 minutes or so.

Re: running wot [Re: joho5] #12412696
09/03/17 11:32 PM
09/03/17 11:32 PM
Joined: Jan 2005
Posts: 6,064
Seadrift TX
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Pat Goff Online content
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Pat Goff  Online Content
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Seadrift TX
Two stroke motors are built to run wfo. Motors that are run hard life longer than motors that were babied their whole life.
Taken in way too many trade ins and it was way more than just a trend.


Pat Goff
Seadrift TX
[Linked Image]

Re: running wot [Re: joho5] #12413402
09/04/17 11:10 AM
09/04/17 11:10 AM
Joined: Nov 2002
Posts: 3,770
Yantis, TX
Gamblinman Offline
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Yantis, TX
Many a good 2 stroke motor has been ruined by improper propping. Prop your boat to run at WOT at the engines recommended RPM limit and you should have no trouble with a long life.

Re: running wot [Re: Gamblinman] #12413957
09/04/17 10:43 PM
09/04/17 10:43 PM
Joined: Dec 2014
Posts: 1,664
Euless
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Muzzlebrake Offline
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Euless
Originally Posted By: Gamblinman
Many a good 2 stroke motor has been ruined by improper propping. Prop your boat to run at WOT at the engines recommended RPM limit and you should have no trouble with a long life.


True dat! Over propped ain't good. Motors do better under a load but not overloaded which is what too much prop pitch does. Even slightly under propped is better than over propped.


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!

Re: running wot [Re: joho5] #12414375
09/05/17 03:04 AM
09/05/17 03:04 AM
Joined: Feb 2006
Posts: 396
Texas
Alumacraft 14 Offline
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Alumacraft 14  Offline
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Posts: 396
Texas
Only reason not to run WOT is to save gas.

Re: running wot [Re: joho5] #12417489
09/07/17 12:18 PM
09/07/17 12:18 PM
Joined: Aug 2006
Posts: 6,888
Quitman,Tx
steve@hydrodynamics Offline
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Posts: 6,888
Quitman,Tx
agree with pat and gamblinman.

worst thing you can do with a 2 stroke, is start it and hammer it.... LET IT WARM UP FIRST!!!!!

alum piston in a steel sleeve !!!! bring em up to 110 to 120 degrees, then rip it!!

Re: running wot [Re: joho5] #12417686
09/07/17 02:51 PM
09/07/17 02:51 PM
Joined: Apr 2015
Posts: 1,684
Grand Prairie Tx
Curtbass Offline
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Joined: Apr 2015
Posts: 1,684
Grand Prairie Tx
It don't hurt to warm up that lower unit a little too before slammin it. I start my mota, idle in gear till motor gets warmed up then I dont worry too much about going WOT. Then I'll run WOT about 8-10 minutes. Thats 9-11 miles) then back off to between 60-80% . T-bend,Rayburn,Amistad,Texoma,Falcon (when its got water in it) in Texas I may have runs like that, but MOST other lakes I'll just find a shorter ramp run if available. Really in Texas theres not that many lakes you can run 70+ or above on before you run outta lake.

Last edited by Curtbass; 09/07/17 02:54 PM.

92' ChampioN 201DCR Elite
13' Yamaha250SHO
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