Return to MarineEngine.com's home page. Home Call MarineEngine.com or send an email message. Contact Info about orders, shipping and returns. Shipping/Returns View your shopping cart. Cart
Need help with your boat parts order? Call 800-209-9624 Monday - Friday 8:30 AM - 5:30 PM EST Order by phone (800) 209-9624
Monday - Friday 8:30 AM - 5:30 PM EST
Free Classifieds Discussion Forum
Topics Topics Edit Profile Profile Help/Instructions Help Member List Register  
Search Last 1|3|7 Days Search Search Tree View Tree View  

Overheated - Now starts hard, runs ro...

Discussion Forum at MarineEngine.com » Pleasurecraft Marine PCM » Overheated - Now starts hard, runs rough - Need Help « Previous Next »

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

Joe Shmoe
Member
Username: boomvang

Post Number: 5
Registered: 06-2008
Posted on Friday, June 26, 2009 - 01:05 pm:   Edit Post Delete Post View Post/Check IP

Well I guess I get to join the dummy club. My 1984 351 PCM (no elec ignition) got overheated the other day. When I realized it I idled back to the dock. I found a leak in the hose to the water pump (hence no water leaking when I checked).

The motor didn't seize, it ran fine idling back to the dock. When I got home and it cooled down, I started it briefly, seemed ok. The next day I changed all my hoses, new impeller (old one was destroyed). Now the motor is very difficult to start. Cranks like crazy, acts like it wants to start but can't "catch". Then when it does start, it runs very rough for a minute or two and then dies (like it's not getting enough gas).

One oddity - took off the distributor cap, cleaned up points and rotor, put cap back on and it wouldn't even TRY to start. Took the cap off, confirmed that I had put the rotor back on (I had), put the cap back on and it immediately changed back to the earlier symptoms of (hard starting, stalling). Seems to indicate that the distributor is somehow involved?

Sorry for such a long post. Thanks in advance for help.

Steve
Top of pagePrevious messageNext messageBottom of page Link to this message

thomas white
Member
Username: thomasj29108

Post Number: 8
Registered: 03-2009
Posted on Thursday, October 08, 2009 - 12:45 am:   Edit Post Delete Post View Post/Check IP

had exact same issue one day and did just what you did to get home. i had found out the next day that the head gasket had actualy faulted(not blown, just was weak between #1 and #2. replaced it and was good to go. hope this helps some.
Top of pagePrevious messageNext messageBottom of page Link to this message

makomark
Senior Member
Username: makomark

Post Number: 1630
Registered: 09-2008
Posted on Thursday, October 08, 2009 - 11:00 am:   Edit Post Delete Post View Post/Check IP

pull the plugs and look for water. if any found or any 'fresh' rust spots, very likely to be time for head work.

A leak down test can be used to verify the situation. To a lesser extent, a compression test can also help.

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

Username: Posting Information:
Only registered users may post messages here. Registration is FREE and easy, click on the REGISTER link at the top of the page. Thanks.
Password:
Options: Automatically activate URLs in message
Action:

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

Free Classifieds Discussion Forum
Home | Contact | Shipping/Returns | Cart
Boat Engine Parts Boat Motor Manuals Boat Accessories
About Us | Terms of Use | Privacy Policy MarineEngine.com, 184 Jones Drive, Brandon, VT 05733 USA
© 2009 MarineEngine.com, Inc. All rights reserved. Phone: 802-247-4700 | Fax: 802-301-1034 | eMail: info@marineengine.com