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Old 07-19-2010, 06:41 PM
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Default Boat wont get on plane please help

Hey Everyone,
I just bought a new boat well new to me that is. Its a 2000 Four Winns 248 Vista. It is a full cruiser so it is pretty big 26.2 LOA. It is powered by a 5.7 Volvo Penta GS. I know this boat isint going to win any races but it wont hardly even plane out. This was our first weekend out on it except for our test drive. Which during that time it did seem to plane better slow but better. The only difference I know of is that we had the fresh water tank and heater full. That would be about 25 gallons of water in the back of the boat. Any way you floor it and the nose comes up and the rpms stall at like 4000 rpms it will ride like that for mabye 30 seconds to a minute and them mabye plane off. Once it planes the rpms will come up to like 4600 which is normal for this engine. I was hoping mabye it wasent proped right. It has a aluminum 4 blade that is 14.75X15. I called a Four Winns dealer and they said stock was a 3 blade 15.5X15 and told me it wouldent make much difference. The boat does have trim tabs but they dont seem to do to much. Could a hydrofoil possibly help this boat. I am definetly stressing about it. We love the boat but I dont want to hate to drive it beacuse its a pain. Its kind of embarassing also. Also once it is on plane it drives pretty good but you need to stay close to WOT it will start to come off plane at any lower so I fell im beating the engine. Which seems to run great otherwise. I look forward to hearing some comments mabye. Mike
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Old 07-19-2010, 06:48 PM
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Mike,

The number of WOT issues are everywhere. The issue I see first hand is fuel related, the fuel has degraded or caused damage to the lines, pumps, injectors, etc.

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Old 07-19-2010, 06:48 PM
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i had the same problem with my wellcraft when i took it out this weekend for the first time. the boat came with one of those new fancy 4 bladed composite ajustable pitch props, i'm pretty sure the pitch is way off, i did have alot of weight in the back, i'm going to throw my stainless prop on for this weekend see how that works, then move alot more of the weight towards my bow. maybe not throw a 300 lb man on a cooler in the back.....

i'd try to balance around your weight more balance it out, i heard trim tabs help too.... apparently your not cool on this forum unless you have trim tabs.... i missed out on that memo
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Old 07-19-2010, 06:49 PM
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Are you trying to plane with the outdrive trimmed all the way down or in?
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Old 07-19-2010, 06:56 PM
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ya I start out with the drive all the way down i dont really know that bad fuel has damaged anything
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Old 07-19-2010, 07:01 PM
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Sounds like the boat is over propped to me -- and that much water right in the back of the boat could make a difference too.

Also, how many more people were on your maiden voyage compared to your sea trial? And where were they on the boat?
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Old 07-19-2010, 07:06 PM
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when we did the sea trail there was three of us same at day one this weekend plus the water and a cooler in the back day to we had 5 people and i had to have them go sit inside to get on plane at all if not it just digs water and stays at 4k rpm if the stock prop was a 15.5X15 3 blade and it has a 14.75X15 4 blade is there much difference?
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Old 07-19-2010, 07:13 PM
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That's a lot of boat for a single 5.7 It weighs 5700# dry so with full fuel and water you are well over 6000# without adding people and coolers etc. That boat needs a big block or small twins. 26' is usually the size where twin v6s begin to be offered both for power and for the manueverability of twin engines.

Having said that, your prop could be a problem. Does it have any dings in it at all? Even a small ding can cost you some.

Engine tucked in, tabs down some and as much weight forward as possible. Only put as much fuel and water in as you need and try to keep the gear and coolers to a minimum. That's about all you can do. Maybe try a prop if the dealer or a prop shop will let you try out some.
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Old 07-20-2010, 09:20 AM
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My father owned a 23ft bayliner ciera that had the same type of symptoms your are having... I know your boat is much bigger and heavier but non the less, they are pretty much the same... First I would venture to say that your boat is way underpowered... Secondly, I would say that the prop is incorrect for your boat... 4600 rpms at wot sounds about 2-300 rpms too low..
We were able to find a happy medium with a prop pitched better for our boat but we were still not completely satisfied with the results.. We ended up putting a 25 gallon fresh water tank at the bow inside the cabin... We were able to put it to good use as a fresh water shower and as ballast... hope this helps
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Old 07-20-2010, 10:14 AM
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Quote:
Originally Posted by Giggity Goo View Post
My father owned a 23ft bayliner ciera that had the same type of symptoms your are having... I know your boat is much bigger and heavier but non the less, they are pretty much the same... First I would venture to say that your boat is way underpowered... Secondly, I would say that the prop is incorrect for your boat... 4600 rpms at wot sounds about 2-300 rpms too low..
We were able to find a happy medium with a prop pitched better for our boat but we were still not completely satisfied with the results.. We ended up putting a 25 gallon fresh water tank at the bow inside the cabin... We were able to put it to good use as a fresh water shower and as ballast... hope this helps
Some good comments above here. I agree, you are in the bottom rung of the acceptable power for that boat. You will need to down prop and keep an eye on how much load you have and where it is. The down prop will cost you top end speed but WOT is a rare usage anyway. You will be much happier at the low end and thru the mid ranges.
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Old 07-20-2010, 11:07 AM
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I have a 24.1 WA Proline with a Mercruiser 5.7 2BBL carb with a bravo 2 lower unit. I think the prop is a 16" with a 19 pitch. It has a 160 gallon gas and 25 gallon water tank and I have plenty of power. I have had 5 guys (two very big) gas tank full and had no issues getting on plan so I think you have something else going on. I had all 5 guys in the back and still had no planning problems.
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Old 07-20-2010, 11:29 AM
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Unfortunately I'll have to 3rd or 4th the under powered observation. The V/P 5.7 GS is a 250HP engine. My 24' (26' LOA) cuddy weighs about 4500 and runs a Merc 5.7/300 HP through a B3 Drive and I consider the 300 HP engine to be the minimum acceptable for my boat/weight. When I get 5 or 6 bodies and their stuff on board the increased weight is obvious. Of course, "acceptable" is subject to opinion.

So, assuming your 5.7 GS is running properly, I think your only options are to re-prop and/or watch your weight. Trim tabs will help.
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Old 07-20-2010, 11:30 AM
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Quote:
Originally Posted by fishingfun View Post
I have a 24.1 WA Proline with a Mercruiser 5.7 2BBL carb with a bravo 2 lower unit. I think the prop is a 16" with a 19 pitch. It has a 160 gallon gas and 25 gallon water tank and I have plenty of power. I have had 5 guys (two very big) gas tank full and had no issues getting on plan so I think you have something else going on. I had all 5 guys in the back and still had no planning problems.
A 24 WA is nowhere near as heavy as a pocket cruiser. This guy is borderline on power and will have to adjust to make it work.
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Old 07-20-2010, 11:36 AM
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I think you got sold a bill of goods. Whenever you sea trial any boat that might seem marginal in power, and a 26' boat with a single 270-300 hp 5.7 fits that bill, insist upon full fuel, water and a minimum of 1,200 lbs of people and gear.
A prop change might help, but usually to get help to go on plane guys will go to 4 blades from 3, which will cost some top speed, but help planing. The fact that it turns 4600 @ wot, means it is close to the right prop - the right prop is probably a 15.5 x 14.5 4 blade stainless.

That boat really needs an 6.2 or 8.1 to run right.
I had an uncle with the same boat (not sure of year) and power - he thought it was fine, but he never had more than 4 people and 1/2 tank of fuel on it. Imo, it was just slow.
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Old 07-20-2010, 11:49 AM
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This might be a stupid question, but does the boat stay in a wet slip? If it does have you checked the condition of the bottom? It might be fouled up with growth. Just thought I`d ask.
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Old 07-20-2010, 11:58 AM
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Did you check to make sure your drain plug's in tight? Maybe you have a bunch of water in the bilge?

Does your motor sputter? Last weekend, I replaced about 6 ft of fuel hose that was almost completely blocked from ethanol melting the insides of it. Well maintained 2004 Whaler too.
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Old 07-20-2010, 12:25 PM
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Your boat is so underpowered building and selling it was criminal. But this is what you have to work with. Someone already tried to help the hole shot with the 4-blade prop. You must start with tabs all the was down and the outdrive all the way in. Push in the throttle and as the boat starts to push over the hump start trimming the drive up. Leave the tabs alone until she has planed off. I would dump the water for now and leave your friends on the dock until you can get the boat on plane.

If it still does not plane out; and cruise at 3000-32000 rpms you have other issues in addition to being woefully underpowered.

Bad fuel
Marine growth
engine issues including timing, plugs, wires, ect

Maybe the stainless 3 three blade may do better on plane; but I suspect the 4 blade will give a better hole shot and more lift to the stern.

I had a neighbor who had a bad time getting his boat on plane. Drive down; tabs in and as you build speed bring the drive up. He just had to learn how to drive his low HP single engine bayliner. I suspect you will get the hang of it; but it will never be a load with fuel, water, ice, beer and a bunch of people boat.
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Old 07-20-2010, 12:36 PM
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Are all your plug wires in or does your oil smell like gas? Loose or bad plug wires can cause this
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Old 07-20-2010, 12:39 PM
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http://www.thelog.com/boattests/theboattest.aspx?x=3085

Not sure how different your boat is from this one but, according to this review, you have a larger motor that was available for your boat. They even powered these with 5.0's. Are you topping out at 45mph? According to FourWinns in that review, that would be your top end, depending on load. Cruise around 20mph?

They also said their 5.0 test boat took 8 seconds to plane, so yes, it's a heavy load but your 5.7 should push it. Maybe not as fast as you thought though.
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Old 07-20-2010, 01:16 PM
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You did not buy a bad boat, there were a lot of those made and a lot of folks are happy with them. Yeah, it would be nice to have a big block in it, but you will be ok. Not sure what your $$ situation is, but if you get a chance to borrow a Mercury Mirage Plus prop, you might want to try it. Expensive, but will give you a strong hole shot and still good top end, it is a 3-bladed prop.

Try to balance your load more toward mid-ship or toward the bow if you have a choice. When you have a lot of stuff at the rear, heavy throttle tends to cause the stern to just dig a deeper hole, so you want to keep the bow down as much as possible. NOTE, in heavy seas you will want to ignore this advice!

But under normal driving your goal should be to keep as much of the hull on the water as possible to achieve quicker planing speeds. Tabs all the way down. Visually check them to see if they are really down. Outdrive down heavy on the gas, boat should plane. If not check for the stuff folks mentioned above' growth, engine issues, etc.
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