Need Help for Yanmar 18Hp locked up - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 07-24-2011
Junior Member
 
Join Date: Jul 2011
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
2000ModelHunter is on a distinguished road
Need Help for Yanmar 18Hp locked up

I just got our boat out of dry-dock new topside and bottom paint after tsunami and yesterday took her out sailing. Coming in she seized up with no warning, no over heat buzzer or warning light just shut down locked up in the bay coming in. We dropped anchor right away but drifted a bit to shallows while calling for a vessel assist. A big 52 footer there in Keehi towed us back to our slip where she's at now. I had to cut our anchor when the other captain was afraid he would hit shallows as well and wanted the tow line secured for the tow which I struggled to get both done at the same time. He got so close to us on a pass to throw us a line he hit the BBQ grill and came inches from scrapping us I had to yell at quests aboard to jump back as I thought a surf board he had tied on his stantions was going to come inside our lifelines as he passed. Very harry!

Anyway, I thought I would ask what anyone if they were me would do to see if we can get her freed up. My brother who is a mechanic on the mainland said we might pull the glow plugs and get oil on the pistons and she might be free. He said it sounded like the thermostat got stuck. Said it might be free this morning if its cooled down. There was over flow in the pan under the motor. And the overflow was low in the bottle at the top of the motor. Oil was full. And she did get real hot.

Hope someone can help.
Reply With Quote Share with Facebook
  #2  
Old 07-24-2011
bljones's Avatar
Senior Member
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,128
Thanks: 32
Thanked 70 Times in 63 Posts
Rep Power: 7
bljones has a spectacular aura about bljones has a spectacular aura about
Your brother is on the money as far as diagnosis. Then once you know what the problem is, you have to fix the problem. I think you're probably going to be pulling the head, which on a Yanmar is no big deal, and check the cylinder walls for scoring, but before that, if the engine will turn over, do a wet and dry compression test. If the crankshaft won't rotate, then you are going to have to yank the head at a minimum.
__________________
It's 5 o'clock somewhere:


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 07-24-2011
MedSailor's Avatar
Closet Powerboater
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 2,394
Thanks: 58
Thanked 50 Times in 42 Posts
Rep Power: 7
MedSailor is on a distinguished road
It does sound like you overheated, but don't miss easy and obvious stuff like catching something on the prop or a transmission issues instead of an engine one. I sucked a 12food rug into my prop and got it wrapped around the shaft once.

With the engine off put the gearbox in neutral and see if you can rotate the shaft by hand. If you can't, the bind is at the shaft/prop. If you can rotate it by hand, and the engine still won't turn over it's bound in the engine (as suspected).

Good luck.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 07-24-2011
TQA's Avatar
TQA TQA is offline
Bombay Explorer 44
 
Join Date: Apr 2009
Posts: 2,436
Thanks: 0
Thanked 33 Times in 29 Posts
Rep Power: 6
TQA is on a distinguished road
If a diesel gets hot enough to seize it will stink. Pull the dipstick and smell the oil. If it smells normal look elsewhere.

Did it stop with a clonk or peter out?

Could there be something round the propshaft and preventing the gearbox going to neutral?

Can you get a spanner on the crankshaft pulley nut and try to turn the engine?
Reply With Quote Share with Facebook
  #5  
Old 07-24-2011
davidpm's Avatar
Senior Member
 
Join Date: Oct 2007
Location: Madison
Posts: 3,656
Thanks: 162
Thanked 36 Times in 29 Posts
Rep Power: 7
davidpm is on a distinguished road
On our universal 2gm the PO got the engine hot enough to stop. Forgot to open the raw water thruhull.
Let it cool down and it ran fine for another season before selling the boat.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Perkins 18HP Catalina 270 Engine Won't Start Trescool Gear & Maintenance 21 11-20-2010 10:14 PM
Yanmar 18hp Exhaust Hose max-on Gear & Maintenance 2 08-25-2008 03:45 PM
Leaky Raw-Water Pump Perkins 18HP - Catalina 270 Trescool Gear & Maintenance 13 09-02-2007 07:45 PM


All times are GMT -4. The time now is 11:16 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.