NO POWER ON TAKE OFF
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: Common Questions
Forum Discription: Visit here first for common questions regarding your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=21412
Printed Date: November-24-2024 at 4:14pm
Topic: NO POWER ON TAKE OFF
Posted By: zx900rr
Subject: NO POWER ON TAKE OFF
Date Posted: April-21-2011 at 8:45pm
| I am new to this site, recently purchased my 1982 Ski Nautique 2001. Have done all the basic maintanace, fluids, impeller etc. Took her out to the lake today and attempted to pull a skier and she had very little power on take off, once the boat planed it seemed like a "powerband" kick in. I have no idea how to trouble shoot this any advice would be greatly appreciated. |
Replies:
Posted By: Bri892001
Date Posted: April-22-2011 at 1:26am
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Seems everyone is talking carburetors lately. Any possible issues will tend to show themselves when a boat had been sitting for a while.
Old, stale fuel is a possibility. Unless you have many skiers, the boat should have no problem, unless it's not getting the fuel it's supposed to (carburetion) If you have no skier, and you just hammer the throttle off the line, will it take off? Or will it bog, cough and sputter? Too steeply pitched a prop would be another possibility, but not super likely. The 89 and new boats mostly have a gear reduction tranny, 1:23 or PCM "Power Plus" as it's called. These trannies can run a steeper prop. If someone put one of these on your 1:1 tranny boat, it could really hurt you out of the hole. |
Posted By: skyway2k
Date Posted: April-22-2011 at 1:28am
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I would check to see you're getting a squirt from your accelerator pump when you open up the throttle. If that's not working, it will fall flat hard on its face when you gun it. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=5240&sort=&pagenum=1 - '91 Ski Nautique |
Posted By: QUEBEC
Date Posted: April-22-2011 at 2:10am
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Check the points-dwell-timing-fuel from accelerator pump- has the boat been sitting long /gas + gas filter - fuel pump / fuel pressure. ------------- NEVER EVER GIVE UP ON YOUR SELF YOUR FAMILY YOUR FRIENDS AND GOD THERE ALWAYS A NEW DAY |
Posted By: levinmark
Date Posted: April-22-2011 at 10:31am
When I bought our 96' last year, it had been sitting for 3 years. Carb had a lot of corrosion, and fuel only shot out of the primary jets and not the secondary when under a load. Idled fine and picked up power ok when gradually increasing speed. Long story short, ran like crap under load (stalling, sputtering), rebuilt carb, didnt work (secondary kept sticking, couldnt even turn by hand, replaced carb with new one, now runs like a bat out of hell!! By the way, I'm no mechanic and dont know the correct terminology or mechanics of a carb  This is what worked for me.------------- levin |
Posted By: Bri892001
Date Posted: April-22-2011 at 12:49pm
|
zx900rr,
There's no powerband, like a motorcycle (I assume that's your username). These motors are designed to make torque everywhere. If they're running right, they should. -Brian |
Posted By: horkn
Date Posted: April-22-2011 at 1:06pm
|
Brian, I'm pretty sure he meant the engines "sweet spot", and no power valve like you must be thinking. He did use quotes around the word "power band". For the most part sport bikes don't have power valves. Those are on 2 strokes, and aside from the early 80's, and a few non street legal race bikes, there are no 2 stroke sport bikes.
A zx900RR is a mish mash of kawasaki vehicle terms and not real production bike name. Take the R's off the end, and yeah, that works, or leave the 900 off and the ZX RR is the moto GP bike kawasaki had for several years. Typically ninja 900's are called zx9's or zx9R's. Back to the real issue though, I'm certain your carb has either a power valve or accelerator pump issue by your description of it not having power under load. It needs extra gas to haul a person out of the water. It does not sound like it is getting that extra fuel. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: zx900rr
Date Posted: April-22-2011 at 1:24pm
| Thank Y'all for the advice this is my first boat and am very happy it is a classic nautique. yes a Zx9r is the bike that i ride. Excuse my ignorance for the using the term power band, but i did not know how else to describe the issue i was having. I will check the accelerator pump, if it is not working correctly, should move forward with a full rebuild kit? additionally, is it a hard project to under take? i am mechanically inclind, but have never rebuilt/worked on a carb. |
Posted By: zx900rr
Date Posted: April-22-2011 at 1:31pm
|
if i have no one on the boat she takes off but not as strong as expected. my brother has a 88 and his freaken pulls and growls. that is the comparison i am using.
example, when pulling a skier and i have 4 people on board the boat seems to have no power initially. like is is being bogged down, then what i was discribing as a powerband effect, the power just comes back on the top end . totally just seems to have no power in the initial take off. |
Posted By: skyway2k
Date Posted: April-22-2011 at 1:36pm
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If you don't get two streams of gas squirting out of the accellerator pump nozzle for a moment when you advance the throttle, the best bet is the diaphragm is torn and needs replaced.
Take off the flame arrestor and watch the top of the carb when someone advances the throttle. You should do this without the engine running just to check. You should see two streams of fuel going in to the front two barrels of the carb. If you don't two streams of gas, you have a problem you need to troubleshoot. This would be the first thing I would check. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=5240&sort=&pagenum=1 - '91 Ski Nautique |
Posted By: horkn
Date Posted: April-22-2011 at 1:36pm
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Naw, you used the term power band correctly.:)
To do a real quick check, have the motor off, and preferably on the trailer, disconnect the throttle cable from the carb linkage, and take off the flame arrestor( air filter) from the carb. If gas does not shoot from the 2 squirters on the primary barrels ( the front 2 barrels of the carb) as soon as you engage the throttle from the idle stop on carb, then that's a good indication that it may simply be not adjusted right, or that you need to rebuild the carb. Rebuilding a carb is easy fro anyone that is mechanically minded. Go to holleys website, and watch the carb tuning videos. Those are priceless. While some things on a marine carb are different from an automotive one, the basics are the same. On boat, with all that water resistance, having the accelerator pump and powervalve operating properly are keys to a good running boat. edit, I see skyway posted at the same time;) you can do it yourself by taking the connector off the carb linkage, but you may simply need a new accelerator pump diaphragm, or an adjustment. You can just buy the AP diaphragm and put that on without rebuilding the whole carb. More than likely you would need a new gasket for the bowl as you simply take the front bowl off, and then the AP diaphragm is on the bottom of the front bowl. If there is a good squirt, from the AP, but it is late, that would indicate that it needs to be adjusted, but judging from your description, it's not a hesitation then it goes well, but rather it never kicks in, with more load on the boat. Not until it gets above that point where probably the secondaries kick in, or the carb is on a different circuit. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: Bri892001
Date Posted: April-22-2011 at 1:38pm
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Yeah, I would suspect your accelerator pump. If it's running fine on top.
If you take the spark arrester off, (with the motor shut off) Look into the primary bowls. Have a friend pump the throttle once or twice, you should see a little squirt come from the side and go in there. Also, make sure you're getting it as soon as the plates open. Even a moment too late and you'll have hesitation. Worth checking the timing as well. |
Posted By: Bri892001
Date Posted: April-22-2011 at 1:39pm
Jinxx!! 
|
skyway2k wrote:Posted By: Bri892001
Date Posted: April-22-2011 at 1:41pm
Oh man, I guess I didn't read the other posts. We all said the same thing. Of course, if he's getting a squirt, but it's just coming on too late, then he could adjust the accelarator pump linkage without a full rebuild. Wouldn't even have to take the carb off the boat. |
Posted By: horkn
Date Posted: April-22-2011 at 1:45pm
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LOL, we are all on the same page:)
We'll help you out as much as possible Santiago! ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: 8122pbrainard
Date Posted: April-22-2011 at 1:56pm
|
Tom,
Krones gave you Good Friday off? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: horkn
Date Posted: April-22-2011 at 2:37pm
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yessir! It is a good Friday;)
I did however have to use a personal day on that Blizzard Wednesday this winter when most of Wi and IL had a blizzard. Krones didn't call off that day, so I had to use a personal day. I don't know of any other business that isn't like a snow plow company that didn't pay their employees with no sick day required. Of the over 400 employees, only about 20 made it in to work that day, and all of those live basically across the street. So, in my mind this makes up for it. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: zx900rr
Date Posted: April-26-2011 at 11:01pm
| took her out today, did as told check the card with boat off and did see two streams of fuel when throttle was engaged, question does it make a difference if i engaged it in nuetral or in gear. i ran her today and had the same issue. she did spatter and back fire a bit, once again thank you for your help and advice. |
Posted By: Luchog
Date Posted: April-26-2011 at 11:28pm
|
did the boat ever run any better than this? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: zx900rr
Date Posted: April-26-2011 at 11:43pm
| Yes it did. When I first purchase the boat she had alot of initial take off power. I did replace throttle cable, basic tune up wires plugs etc. |
Posted By: Luchog
Date Posted: April-26-2011 at 11:52pm
what would "basic" tune up be? Did it evern ran good after this? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: Bri892001
Date Posted: April-27-2011 at 12:54am
Double... triple check that you didn't accidentally mis-route a plug wire. It can get confusing. It could still run, but you'd lose a lot of power with a plug wires mixed up. Separately, with the stream of fuel. Make sure that your getting it immediately when you open the throttle. The fuel stream needs to be hitting the moment the throttle plates open. If the stream is even a fraction of second late, you're going to get a big hesitation. The accelerator pump linkage can be adjusted to correct this. |
Posted By: horkn
Date Posted: April-27-2011 at 1:20am
|
Also, unless the accelerator pump diaphragm or powervalve has been changed recently, either of these could have eroded, and cause issues. But yes, adjust the accelerator pump as that is free.
Holley's website is awesome and has vids. I recommend those to anyone that wants to either DIY or simply learn more about them. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: Bri892001
Date Posted: April-27-2011 at 12:31pm
I wound up buying the Holley DVD which was really helpful as well. I also found this book useful for understanding basic principles:
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Posted By: C-Bass
Date Posted: April-27-2011 at 12:55pm
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Have you checked your timing yet? ------------- Craig 67 SN 73 SN http://www.correctcraftfan.com/diaries/details.asp?ID=6103" rel="nofollow - 99 Sport 85SN |
Posted By: 65 'cuda
Date Posted: April-27-2011 at 1:43pm
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Replaced the throttle cable? Are the throttle plates opening fully? ------------- Gary http://www.correctcraftfan.com/diaries/details.asp?ID=941" rel="nofollow - 1965 Barracuda SS |
Posted By: zx900rr
Date Posted: April-27-2011 at 2:22pm
| that is a great question i didnt check that, if they are not any advice on how to adjust them? |
Posted By: Luchog
Date Posted: April-27-2011 at 9:30pm
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unless you replaced the cable with a shorter one I dont see why you'd have a problem there.
What else did you service? Did the boat ever run good after it? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
Posted By: 82wake2001
Date Posted: June-02-2011 at 12:58am
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Zx looks like we have the same boat. I have almost rebuilt my engine. With a ton of help from here and friends. Pm me if you have any questions. ------------- Joe 1982 ski nautique 2001 "Lady of the Wake" |
Posted By: Bri892001
Date Posted: June-17-2011 at 5:20pm
| Where you ever able to fix the issue? Just curious. |
Posted By: zx900rr
Date Posted: June-18-2011 at 4:10pm
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i have been in and out of town. i will be taking her out on tuesday, i am hoping i can just clean her out and put some fresh fuel. i will keep you posted. thank you for the help!
saludos |
Posted By: WildH2OSkier
Date Posted: July-12-2011 at 11:13pm
|
Good luck and when you take her out get a cheap timing light and check that.
Also I have to second the check of the plug wires. I managed to have 7 & 8 reversed on mine. I also had problems that sounded quite similar to yours from a source that no here has mentioned yet..... how are your exhaust hoses? I had one that had a crack in it and basically I was reburning the exhaust gasses coming from cylinders 1 2 3 & 4. This was causing me to come out of the hole really weak because of the build up of carbon dioxide while idling but when the boat got up to speed enough air was forcing its way to clear out the motor box and give it enough clean air to run. |
Posted By: 8122pbrainard
Date Posted: July-12-2011 at 11:59pm
Please fill us in on this "carbon dioxide" problem. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: WildH2OSkier
Date Posted: July-13-2011 at 12:29am
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Whoops my stoopid pill must have kicked in really good there. I would go back and edit this but since you wisely chose to quote it I guess I shall accept the ribbing. Dioxide/monoxide, tomato/potato lalalalaaaah!!
I've got a correct Craft, I'm too blessed to be stressed. 
|
Posted By: Chris4x4gill2
Date Posted: July-13-2011 at 1:06pm
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I had a similair issue after doing a tunup over the winter (plugs / wires / cap / rotor / points / conds.).
After investigating, I found that my timing was off. I corrected the timing back to the factory spec and she runs like new. ------------- /diaries/details.asp?ID=4472" rel="nofollow - '89 Ski Nautique 2001 |