Prop spinning in neutral
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=47314
Printed Date: November-15-2024 at 12:27pm
Topic: Prop spinning in neutral
Posted By: bfootr
Subject: Prop spinning in neutral
Date Posted: April-02-2019 at 9:42pm
| Restoring a 89' SN that I purchased last Nov. It needed a lot of work. Engine was seized and after much work and numerous parts, we got the engine running. We haven't had the boat in the water yet. I noticed that while running the engine on the trailer (w/ water hookup), the prop will spin slowly (maybe 60 -80 RPM's per minute) in neutral. I am able to stop the spinning somewhat easily by applying some pressure on the trans coupler (w/ a 2x4). Trans seems to operate smoothly in and out of gear. The spinning will stop as I increase throttle in neutral. Is the spinning in neutral at idle normal? I would think maybe the spinning will slow once in the water with prop load applied. Appreciate any advice. Thanks! |
Replies:
Posted By: Kristof
Date Posted: April-03-2019 at 4:03am
|
So does mine. Has always done it. Never bothered to do anything about it. It's called a "dirty neutral"... ------------- - Gun control means: using BOTH hands! - Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
Posted By: KENO
Date Posted: April-03-2019 at 9:04am
|
Like Kristof said, it's referred to as a "dirty neutral" It's not really normal, but if you can easily stop the shaft with your 2 X4, I'd leave it alone, put it in the water and see how it acts, then decide if you need to do something about it.. Plenty of boats running around out there with a dirty neutral for years and years without any issues. In the link below are a bunch of threads about that "dirty neutral" Keep in mind that on an 89 you have the PCM 1.23 to 1 transmission when reading about this https://www.google.com/search?q=correctcraftfan+dirty+neutral&oq=correctcraftfan+dirty+neutral&aqs=chrome..69i57.12848j0j4&sourceid=chrome&ie=UTF-8" rel="nofollow - link PS hope you're wetting the strut and cutlass bearing when you're bumping it into gear on the trailer or you'll be putting undue wear on the cutlass bearing. Loud groaning noises will be your first indication of the shaft spinning in a dry bearing for very long. |
Posted By: Kristof
Date Posted: April-03-2019 at 10:32am
When on the trailer, I can stop the prop with two fingers... When in the water, I can stop the shaft with three fingers...  Mine has done so since I have the boat and also did so with the previous owner. and this without any issues. I even use the dirty neutral when I want to load her on the trailer at the ramp very, very, very, very, very slowly  ------------- - Gun control means: using BOTH hands! - Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
KENO wrote:Posted By: KENO
Date Posted: April-03-2019 at 11:11am
There's something inherently wrong with having fingers and a moving prop or prop shaft in the same location |
Posted By: 8122pbrainard
Date Posted: April-03-2019 at 11:16am
You haven't had the pleasure of meeting Kristof!  ------------- /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: desertskier
Date Posted: April-03-2019 at 12:28pm
| My '89 has an intermittent dirty neutral also. If I feel it turning I can give the throttle a little blip and it usually stops. It was worse when I first bought it but it also needed a dampener plate. After replacing the plate it seemed to get better but hard to tell since I hadn't run it very much. |
Posted By: JoeinNY
Date Posted: April-03-2019 at 12:50pm
|
While the typical dirty neutral is in due to internal issues, either minor or less so – this presumes that you have your control cables correctly adjusted. Its worth removing the cable to see if you can find a position with the transmission control level that stops the spinning. If you can time to adjust the cable end. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: 8122pbrainard
Date Posted: April-03-2019 at 2:29pm
Sean, That "blip" may be repositioning the trans shift lever. Do check your cable adjustments. ------------- /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: desertskier
Date Posted: April-03-2019 at 4:32pm
| Good idea. I will add it to the list. |