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Old 05-10-2005, 01:25 PM
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Default Throttle control tension adjustment thread?

Hey Sim,

You posted a throttle control tension adjustment thread a year or two ago, did that disappear, I can't seem to find it?**** You know, how to adjust the throttles when one is slipping slightly (backing down) while running.

My Stbd throttle needs tightned up and I forgot how to do that.
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Old 05-10-2005, 01:53 PM
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Default RE: Throttle control tension adjustment thread?

Hey Birdman,

Heres a link but the pics are red x'ed now. http://www.thehulltruth.com/forums/thread-view.asp?tid=33346&start=1*The picture links may be to the old THT.net days and*I have to edit
e-point them to my web server location.

Anyways.....hardest part is getting those little screws out without stripping them . Work them back and forth while taking them out since they strip easy.

Did you figure out your trim sensor's?

Andy
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Old 05-10-2005, 02:19 PM
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Default Re: Throttle control tension adjustment thread?

That was the thread, thanks. You be the man!! Haven't checked the trim sensors yet. I'll try to take a look tonight after adjusting my throttle friction.

Did Yami make a 4 HP 4 stroker that weighs in under 20*pounds yet?**
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Old 05-10-2005, 03:53 PM
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Default Re: Throttle control tension adjustment thread?

Come on........you still have not made the plunge? Take one of my F4's and be done with it!! Jk

Andy

PS. Are you out of Yamaha warranty? Those are YES covered parts too.

I also have those missing pictures on one of my machine's....I can email them to you if you want. I can't edit the*thread because its been frozen and because its on the main boating forum page. Maybe I will just copy and paste it*to a new thread...re-post the pics ect.
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Old 05-11-2005, 01:02 PM
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Default Re: Throttle control tension adjustment thread?

You can email those pics if you want, thanks!!*

Yea, I bought that Johnson 3.5, great looking little motor but I haven't tried it out yet. But I'll tell ya, they could make it about 1/2 the weight. I don't understand the manufactures with this little motors. For example, the tiller arm on it is cast iron steel about 1/2" thick. This thing has no real presure on it, why not make it out of a plastic composite. The lower unit should be all composite as well, why is it such a heavy metal.....

Sim, wanna design and market a light motor? Someday when I grow up and get a big boat, I'm going to buy one of your 4 strokes.
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Old 05-11-2005, 01:09 PM
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Default Re: Throttle control tension adjustment thread?

Even though they are supposed to be light they still have to be able to take some abuse from dropping the engine, little junior using it a swim ladder off the dinghy*ect.*If the stuff was all plastic it would break then people would complain about that. Also if the parts were a high tech composite thats going to up the costs of production and make the little engine to expensive to buy.

Well........thats my theory anyways.

Andy
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Old 05-11-2005, 02:56 PM
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Default Re: Throttle control tension adjustment thread?

No, composites are cheaper to manufacture.
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Old 07-26-2005, 05:06 PM
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Default Re: Throttle control tension adjustment thread?

Andy

I read through this and the included link and have two requests.

1) Please email me the pics since I think I will need them when you answer
2) What do I have to do to have the throttles be in alignment when the RPMs are in sync? My STB throttle revs higher than Port when the two are pushed forward the same amount.

Thanks (again)
Ken
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Old 07-31-2005, 01:19 PM
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Default Re: Throttle control tension adjustment thread?

I have asked dealer twice to try and match starboard and port to be the same through 4-5k rpm range. Starboard is still a tiny bit ahead. They say that with the cable being a bit longer you would have to adjust throttle and load to make equal but that would mess with idle and load on motor???? Mine are so close that I can live with it since all other settings are identical.
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Old 07-31-2005, 01:45 PM
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Default Re: Throttle control tension adjustment thread?

Quote:
PSW - 7/31/2005 12:19 PM* They say that with the cable being a bit longer you would have to adjust throttle and load to make equal but that would mess with idle and load on motor???? Mine are so close that I can live with it since all other settings are identical.
PSW,

The length of the throttle cable has a bearing on how much the engine control moves the cable back and forth? I would not think so.........

Whats important is at WOT that the engines see the same or close to the same WOT rpms. Trimed down. Then the other rpm ranges should fall into place.

Andy
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Old 07-31-2005, 07:07 PM
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Default Re: Throttle control tension adjustment thread?

When speaking load I am talking about the preload on throttle cable. We had adjusted to much which can cause port engine to stall under certain circumstances when at neutral. That is normally when docking and is not fun, trust me. The is best rationale I was given for why 3 different twin F 250 set-ups all experienced this issue once or twice over 20 hour stretch. When preload was matched to that of starboard motor all in life is good but there is the slight throttle difference at cruise. Were talking very slight. Any ideas I can try would be much appreciated.
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Old 08-01-2005, 08:43 AM
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Default Re: Throttle control tension adjustment thread?

PSW,

I will have to read up on the F250 throttle cable setup procedures. Maybe I am missing something.....

Andy
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Old 08-01-2005, 03:09 PM
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Default Re: Throttle control tension adjustment thread?

Quote:
SIM - 7/31/2005 1:45 PM

Whats important is at WOT that the engines see the same or close to the same WOT rpms. Trimed down. Then the other rpm ranges should fall into place. Andy
Andy
In my case WOT RPMs are 5500 on both. It's just that on the way there they are not aligned. Is there any adjustment that can be made?
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Old 08-01-2005, 03:52 PM
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Default Re: Throttle control tension adjustment thread?

Are the handles way off or just a little off?

At the engine end, under the cowl,*were the throttle cable attaches to the engines throttle mech, there is a black plastic cable end connector. How many threads can you see behind the locking nut on either engine?

Andy
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Old 08-01-2005, 11:26 PM
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Default Re: Throttle control tension adjustment thread?

Yeah we have adjusted the black plastic cable. That affects the pre-load on engine. If you turn tension to tight in attempt to match up it caused our port engine to stall a couple time during idle shifting while docking. Our controls are so damn close most would probably not notice but there is small difference. I just want to be able to grip like fist and have same now they are like 100-200 rpm different when same same.
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Old 10-03-2005, 10:27 AM
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Default RE: Throttle control tension adjustment thread?

Here is Andy's post, referenced above, with the picture links updated.. I need to do this soon so updated the links:




I get asked frequently how to properly adjust the 704*Yamaha Control handle friction settings. I was doing one for a customer today*so*I thought I would take some pictures of me doing it and post it here on the THT for Yamaha owners to see. I am not trying to promote myself, I just thought posting it here would make it available to more members. Wiley....... move it to my Vendors*forum if*you thinks its not appropriate here on the boating forum.

Step 1: Remove the 4 screws holding the black cover down. This is true for a single control as well as dual controls. Two on the front and two are aft. Some of you saltwater guys may have a hard time getting these off from corrosion. Try tightening them first, then loosen. Work them back and forth since they snap easily.*Make sure you anti-seize or grease them when installing.



Step 2:* There are four small dimple type pins Yamaha uses as a secondary cover holding method. Getting the cover to pop up is the hardest part of the hole procedure. You can kind of see them in this picture and there are four of them:



You will need to pry the cover off of them. Dont try pushing the dimple's*in as it does nothing. The cover must be pryed off. You can also try putting some masking tape down if you have a painted helm to protect it from the prying device:



Step 3:* The cover can now be lifted off forward to expose the adjustment screws. Turn them in(clockwise) to apply more friction to hold the handles from slipping back. Go out to make them move easier. Do not try to put it into gear when testing if the engine is not running. Push the nuetral button in on the side of the handle*to move the throttle handle forward for checking. Sometimes I will go out and run the boat to make sure its the correct friction setting before putting it back together.



Step 4: After you are done adjusting, install the cover and push down until you hear the dimples snap back in place. Put some lube on the screws and tighten them. Pretty simple. The hardest part of the hole job is getting the screws out if they are corroded and prying up the cover up*without screwing up the gelcoat or paint on your helm.



Step 5: Take the $35.00 you would have paid*your local mechanic to do this adjustment*and support the THT by joining or up-grading your Captains Club membership. Its money well spent!! You get a cool shirt and a wedgie thing for your favorite beverage.

As Trouty used to say.....Cheers!!*




-- Tom
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