Home | Classifieds | History | Technical | Links | Store | About Us | Email
Topics Topics Edit Profile Profile Help/Instructions Help Member List Register  
Search Last 1|3|7 Days Search Search Tree View Tree View  

Graymarine 620 shifting hard

Old Marine Engine » Multi Cylinder Gas Inboards » Graymarine 620 shifting hard « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

frank_hurst
New member
Username: frank_hurst

Post Number: 1
Registered: 06-2014
Posted on Monday, June 30, 2014 - 08:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hello,

First time poster here. I was hoping someone could make a suggestion before I just start digging in. It is really hard to push the lever into gear on my '55 Lyman. It is also hard to pull it back to neutral and makes a cracking noise. The tranny says Graymarine right on it, so I think it is actually made by Gray, but not sure. There is a four bolt cover right on top of it. Does anyone know where I should begin with this? I am pretty mechanical. Hopefully it is a common simple fix. Your input would be greatly appreciated. Thank You.
Top of pagePrevious messageNext messageBottom of page Link to this message

speedboy
Member
Username: speedboy

Post Number: 16
Registered: 08-2007
Posted on Tuesday, July 01, 2014 - 09:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

It"s a clutch not a gear. The pressure plate is adjusted with to much load. remove the cover, then remove lock cap screw to back off adjustment 1 notch at a time and test. It may be tight because the plates are worn.
Top of pagePrevious messageNext messageBottom of page Link to this message

ned_l
Member
Username: ned_l

Post Number: 17
Registered: 08-2012
Posted on Monday, July 21, 2014 - 03:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The reverse gear (clutch) was made by Paragon. The easiest way to understand how it works and how to adjust it is to google 'Chris Craft engine manuals' and find a pdf for just about any of the flat head Chris Craft engines (these are much easier to find on the internet than Graymarine manuals). All these mechanical reverse gears are alike inside and adjust the same.

Too tight is better than to loose. Loose and you wear out the clutch plates

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Automatically activate URLs in message
Action:

Administration Administration Log Out Log Out   Previous Page Previous Page Next Page Next Page

Home | Classifieds | History | Technical | Links | Store | About Us | Email
&copy 2005 OldMarineEngine.com, P.O. Box 188, Forest Dale, VT 05745-0188 • Phone: 802-247-4864 • All rights reserved.
   Marine Engine Seloc Repair Manual Lookup Tool

marine gas engine repair and restoration