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lloyds
Joined: 02 Aug 2005
Posts: 1724
City/Region: sublimity
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 22 Cruiser
Vessel Name: undecided
Photos: 1996 22 Cruiser (Lloyds)
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 Posted: Thu Mar 04, 2010 1:28 pm Post subject: twin engine alignment |
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| Here is an easy question for some of you. The boat I just purchased has twin Honda 35's. I am told by the mechanic that the engines should not be perfectly parallel, front to back, but slightly towed in in the rear. Has anyone else done this? If so, what should the difference in inches or fractions be between the steering bars in the front, center to center, and the prop shafts in the rear, center to center. I am told the distance across the back should be slightly less than across the front. Something about the prop wash and how it meets up on twins. |
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Chester
Joined: 04 Sep 2006
Posts: 1176
City/Region: home
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sold to lovely couple
Photos: Chester
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| Posted: Thu Mar 04, 2010 1:44 pm Post subject: |
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In my experience the motors need a small amount of toe in.
Our boat came with about 3/8" toe out and keeping a steady course was difficult. I thought it was the no feedback steering system and I hated it.
After a little research I gave the motors 1/4" toe in and the problem was solved.
These measurements were made from nose cone to nose cone and prop shaft to prop shaft. |
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NORO LIM
Joined: 24 Apr 2008
Posts: 875
City/Region: Olympia
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 23 Venture
Vessel Name: NORO LIM (sold 12/12/14)
Photos: NORO LIM
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| Posted: Thu Mar 04, 2010 2:45 pm Post subject: |
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There are several previous discussions on twin alignment. I think some toe-in is the norm. However, how much is dependent on several things including hull shape, prop depth, horsepower and engine spacing.
Do a Google search for "toe-in," with the site or domain restricted to "c-brats.com"
_________________
Bill, Formerly on NORO LIM
2001 CD 16, 2001-2006
2006 CC 23, 2006-2014 |
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lloyds
Joined: 02 Aug 2005
Posts: 1724
City/Region: sublimity
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 22 Cruiser
Vessel Name: undecided
Photos: 1996 22 Cruiser (Lloyds)
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| Posted: Thu Mar 04, 2010 2:47 pm Post subject: |
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| Thanks, I will give it a try. |
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lloyds
Joined: 02 Aug 2005
Posts: 1724
City/Region: sublimity
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 22 Cruiser
Vessel Name: undecided
Photos: 1996 22 Cruiser (Lloyds)
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| Posted: Thu Mar 04, 2010 5:16 pm Post subject: |
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| Now that I think about it, what does "toe-in, toe-out" mean? Front of engines closer together than rear, or vice versa? I read all the other links and couldn't come up with the answer. |
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colobear
Joined: 23 Jan 2005
Posts: 2154
City/Region: Denver
State or Province: CO
C-Dory Year: 2006
C-Dory Model: 22 Cruiser
Photos: C-Cakes
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| Posted: Thu Mar 04, 2010 5:45 pm Post subject: |
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I noticed that the engines on C-Cakes were not parallel and asked Les at EQ. He told me they were not supposed to be parallel and gave a logical reason (which I have forgotten  ) so I quit worrying. As to how much off parallel they should be, I don't know. Maybe Larry H. or Marc at Wefings could weigh in.
_________________
Patti and Barry
formerly C-Cakes, now
rving around N. America |
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Chester
Joined: 04 Sep 2006
Posts: 1176
City/Region: home
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sold to lovely couple
Photos: Chester
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| Posted: Thu Mar 04, 2010 10:16 pm Post subject: |
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| lloyds wrote: | | Now that I think about it, what does "toe-in, toe-out" mean? Front of engines closer together than rear, or vice versa? I read all the other links and couldn't come up with the answer. |
Put your feet on the floor side by side. If your toes are closer together than your heels think of that as toe in. If your toes are farther apart than your heels call it toe out. If you're built like me your toes are in the front...  |
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hardee
Joined: 30 Oct 2006
Posts: 12632
City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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| Posted: Thu Mar 04, 2010 11:17 pm Post subject: do I stand facing the bow |
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| Quote: | | "Put your feet on the floor side by side. If your toes are closer together than your heels think of that as toe in. If your toes are farther apart than your heels call it toe out. If you're built like me your toes are in the front... " |
Details, WOW  Now I'll have to go check and see what up with my twins. So when I'm checking if I have "toe in or toe out" do I stand facing the bow or the stern 
Harvey
SleepyC 
_________________
Though in our sleep we are not conscious of our activity or surroundings, we should not, in our wakefulness, be unconscious of our sleep. |
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Chester
Joined: 04 Sep 2006
Posts: 1176
City/Region: home
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sold to lovely couple
Photos: Chester
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| Posted: Thu Mar 04, 2010 11:46 pm Post subject: |
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Just like yer cars front wheel toe in, facing foreward. You want the nose cones 1/4" or so closer together than the prop shafts.
EZ to check, EZ to adjust. Well worth your while |
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lloyds
Joined: 02 Aug 2005
Posts: 1724
City/Region: sublimity
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 22 Cruiser
Vessel Name: undecided
Photos: 1996 22 Cruiser (Lloyds)
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| Posted: Fri Mar 05, 2010 11:37 am Post subject: |
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| Okee Dokee, now I have it. Makes sense. Thanks all. |
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Hunkydory
Joined: 28 Mar 2005
Posts: 2657
City/Region: Cokeville, Wyoming
State or Province: WY
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: Hunkydory
Photos: Hunkydory-Jay-and-Jolee
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| Posted: Fri Mar 05, 2010 3:41 pm Post subject: |
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| lloyds wrote: | | Okee Dokee, now I have it. Makes sense. Thanks all. |
Even if Milehog's correct it doesn't make sense to me, but will believe him unless someone else proves differently. Seems to me a 4 wheeled vehicle front being towed in keeping it in a more of a straight path would translate to the twin motors being trimmed in at the props also.
I know the Hunkydory steers straight and great so am going to take measurements on it.
Jay
_________________
Jay and Jolee 2000 22 CD cruiser Hunkydory
I will not waste my days in trying to prolong them------Jack London
https://share.delorme.com/JuliusByers |
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Hunkydory
Joined: 28 Mar 2005
Posts: 2657
City/Region: Cokeville, Wyoming
State or Province: WY
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: Hunkydory
Photos: Hunkydory-Jay-and-Jolee
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| Posted: Fri Mar 05, 2010 3:44 pm Post subject: |
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| Did the measurement and its just as I thought. Props at centers are 22 inches. Nose steering attachments at the center 23 inches. |
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cbgale
Joined: 07 Jul 2006
Posts: 123
City/Region: Calumet
State or Province: MI
C-Dory Year: 2007
C-Dory Model: 22 Cruiser
Vessel Name: Raton
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| Posted: Fri Mar 05, 2010 4:51 pm Post subject: |
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| That sounds like "toe-out" to me. In the automotive world, toe-in means that the front of the tires are closer than the back of the tires. In a boat, the thrust lines are convergent. There is not an automotive counterpart. |
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lloyds
Joined: 02 Aug 2005
Posts: 1724
City/Region: sublimity
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 22 Cruiser
Vessel Name: undecided
Photos: 1996 22 Cruiser (Lloyds)
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| Posted: Fri Mar 05, 2010 5:00 pm Post subject: |
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| Yep, I would guess toe-out as well, from what I have read in the thread. Heck, maybe it doesn't even matter. If I can get on the water this weekend I am going to try 1/2" toe-in and check the wakes. |
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Chester
Joined: 04 Sep 2006
Posts: 1176
City/Region: home
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sold to lovely couple
Photos: Chester
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| Posted: Fri Mar 05, 2010 5:30 pm Post subject: |
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| cbgale wrote: | | That sounds like "toe-out" to me. In the automotive world, toe-in means that the front of the tires are closer than the back of the tires. In a boat, the thrust lines are convergent. There is not an automotive counterpart. |
True, I was just trying to paint a picture of what toe in is. |
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