Can you help me identify the hydrofoil that use to be on my motor?

[Bustedknuckle84]

I have a 200hp Honda outboard. I bought it with the holes in the lower unit and it didn't have the hydrofoil on it. Here is some of the info please help:
1)The holes are 4" apart from each other
2) The holes are about 2 inches in from the outer edge

Its not the attwood hydrofoil the holes didnt reach to the holes on lower unit.

 

[Beefer]

Re: Can you help me identify the hydrofoil that use to be on my motor?

Aren't they available without the holes pre-drilled? That's what I'd be looking for.

 

[chriscraft254]

Re: Can you help me identify the hydrofoil that use to be on my motor?

Why do you ask? I'd be looking for trim tabs instead! Have you looked at smart tabs yet? The reason it is removed is probably because it was useless.

 

[Bustedknuckle84]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I haven't found any, but if you know of some please send them my way. Good thinking!

 

[Bustedknuckle84]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I have trim tabs installed, however i have a hard time with them(new to them). But 5-8 knots the bow is alot higher then i would like.

 

[Beefer]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I haven't found any, but if you know of some please send them my way. Good thinking!

Go to the top of the page, and click on the iboats logo. That will take you to the iboats store. In the searchbox, just put 'hydrofoil', and you'll get what iboats has. I think most of them do not have the holes pre-drilled.

 

[chriscraft254]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I have trim tabs installed, however i have a hard time with them(new to them). But 5-8 knots the bow is alot higher then i would like.

You don't want to run a hydrofoil with trim tabs installed. What kind of tabs do you have, bennetts or Lencos? You can go to there site and learn everything you need to know about the proper operation and what to do when. the tabs will put you in the any attitude you really want. good luck.

 

[Mi duckdown]

Re: Can you help me identify the hydrofoil that use to be on my motor?

There is probably a GOOD reason why that thing was removed. don't worry about it. Go boating

 

[Bondo]

Re: Can you help me identify the hydrofoil that use to be on my motor?

There is probably a GOOD reason why that thing was removed. don't worry about it. Go boating

Ayuh,.... Ditto that,.... A whale-tail, and trim tabs will cause the boat to plow....


ALL the time...

 

[Bob's Garage]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I have trim tabs installed, however i have a hard time with them(new to them). But 5-8 knots the bow is alot higher then i would like.

Use your engine's tilt/trim function to adjust the attitude of the boat fore and aft, use your trim tabs to adjust lateral, side to side, trim.

Adjust your drive down or in to bring the bow down, the adjust it up or out to reduce drag and increase performance and economy. Make adjustments slowly to achieve the desired effects. The changes will appear minor until you get use to using the system. Then listen for change in engine sound and watch the tach, you'll see the difference there and the speedo, or gps.

You use the tabs to balance the boat to offset uneven loading, passengers and gear. Tab down on the low side and it will level the boat. Use small changes in the tab to make large changes of the boat.

You have the best of both worlds, learn to make use of them. Just remember you can't hurt anything by experimenting as long as you don't hit anything.

At the speed you are talking about, you are going really slow, like maybe a no wake, or min. wake zone. If you came down to that speed from planning speed your boat is plowing, throwing a "large" wake. (If I am wrong, ignore the rest.)

When coming off plane to a no, minimum, wake zone bring your boat off throttle, let it settle in the water (it will still be moving) but once settled put it back in gear and bring it to around 1000 rpm (give or take depending on you particular set up), and you will find your "other" 5-8 knot speed. You will now be in displacement mode instead of trying to "plane", no plowing, just skimming along.

 

[Bustedknuckle84]

Re: Can you help me identify the hydrofoil that use to be on my motor?

I have the bennett trim tabs. so let me make sure i understand you guys, if i learn to use them correctly i should be able to keep the bow down at trolling speeds 5-8 knots?
Im pretty good at the power trim on the motor, but right now im at a point where i cant go WOT for long before the boat is turning to one side unsafely.However I did buy the trim tab indicator system and installed that recently. Im thinking that will help me alot.

 

[Bob's Garage]

Re: Can you help me identify the hydrofoil that use to be on my motor?

You didn't say you were trying to troll. That's a different kettle of fish that someone familiar with troll may be able to answer.

But the other problem at WOT needs correcting as it is absolutely not normal. More information would be helpful.

 

[Bustedknuckle84]

Re: Can you help me identify the hydrofoil that use to be on my motor?

You didn't say you were trying to troll. That's a different kettle of fish that someone familiar with troll may be able to answer.

But the other problem at WOT needs correcting as it is absolutely not normal. More information would be helpful.

yes I would like to be able to troll comfortably. it had a large wake last time i was out at slow speeds. But i also had seen one tab was way furter down then the other.

Can you help me with these questions please:
1) I have a 98 bayliner w/a cuddy cabin, it seems like the cuddy cabin is way more stable then my center console. stable as in center of graivity ex: the center console dips down alot depending on which side of boat your on. Is this normal?

2) It seems like turning sharp @ over 20 mph is very difficult(unstable) to do in my center console, is this because im not operating the trim tabs correctly?

 

[Bob's Garage]

Re: Can you help me identify the hydrofoil that use to be on my motor?

yes I would like to be able to troll comfortably. it had a large wake last time i was out at slow speeds. But i also had seen one tab was way furter down then the other.

Can you help me with these questions please:
1) I have a 98 bayliner w/a cuddy cabin, it seems like the cuddy cabin is way more stable then my center console. stable as in center of graivity ex: the center console dips down alot depending on which side of boat your on. Is this normal? (yes)

2) It seems like turning sharp @ over 20 mph is very difficult(unstable) to do in my center console, is this because im not operating the trim tabs correctly(maybe)?

Again, I am not familiar with the procedures required to troll, so I can not speak to specific problem. Also, all boats are different with different characteristics but there are some general rules of thumb to go by.

1. Your cuddy is probably wider and flatter, specially at the stern, stern which tends to give better stability at rest. This means it doesn't tip as radically when everyone stands on the same side of the boat when you are relaxing at anchor.

The CC has a much sharper "deadrise" which gives a smoother rider as the hull will cut thru the waves and wakes easier. But, as there is less flat area on the aft keel area, the boat will tend to be more sensitive to weight on the sides when at rest and underway.

A malfunctioning trim tab will exacerbate the problem and can make operating dangerous, as you have noticed. (I do not run tabs so I am making an assumption here) If you are running your tabs in a full down position you may need to raise them to neutral before making a turn. Otherwise the inside tab may be down enough to "catch" and cause the boat to pivot on it. A sharper than expected turn and loss of control could follow. My advise would be to not use the tabs when you know you will be making a lot of at speed turns.

2. If you mean that the boat wants to resist turning and there is nothing wrong with your steering, then it may be the "tab" on the lower unit is out of adjustment. It also depends on you type steering, of course. However the tab is intended to off set the torque generated by the engine. The engines tendency is to turn the boat to the right (standard rotation) and the tab is adjusted to counteract this. (It's a small thing but really has an effect.)

I hope this helps and I hope the information is accurate. Someone else will help with the trolling.

Now for a commercial: A Power Squadron boating course, one that is proctored, will answer a lot of you questions and enable you to ask questions of other boaters in your area.

 

[Bustedknuckle84]

Re: Can you help me identify the hydrofoil that use to be on my motor?

1. The CC has a much sharper "deadrise" which gives a smoother rider as the hull will cut thru the waves and wakes easier.

2. If you mean that the boat wants to resist turning and there is nothing wrong with your steering, then it may be the "tab" on the lower unit is out of adjustment. It also depends on you type steering, of course. However the tab is intended to off set the torque generated by the engine. The engines tendency is to turn the boat to the right (standard rotation) and the tab is adjusted to counteract this. (It's a small thing but really has an effect.)

1. That was one of my questions as well, i do notice this boat slices through the waves better and not much splash into the boat.

2. your words "boat wants to resist turning" nailed it on the head. So i believe i have another issue then. the starboard tab when i come out of the water is always lower than the port side. I have hydraulic steering. But I have couter rotation though(honda bf200 motor)

This is really helping me alot thanks for the info!

Still would like someone to chime in on if trolling or even crusing 5-8knots should i get a hydrofoil to help keep bow down or the trim tabs can do the same job?

 

[Bob's Garage]

Re: Can you help me identify the hydrofoil that use to be on my motor?

With counter rotating the tendency is to go left easier than right, as in right now easier.

There is an accessory called a "trolling plate" that may help, google it. But it could be that all your weight is in the back during trolling and nothing will correct that except moving some of it forward.