Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 25-02-2010, 06:08   #1
Registered User
Atraxia's Avatar

Join Date: Nov 2008
Location: Spending a few seasons in the Med
Boat: Mikelson 51, a Becker 27 for summers in Sweden and a Dutch Tjalk from 1909 we call home
Posts: 143
Send a message via Yahoo to Atraxia
Perkins 4-108 1981

Dear forum members,
I am checking out a Mariner 39' 1981 which has a Perkins 50HP 4-108 engine. Apart from looking a bit neglected on the visual side and wiring it has a pretty load knocking noise when opperated. I am familiar with Yanmar and Volvo engines but don't know a thing about the Perkins. Is this noise acceptable? Is there anything I should pay special attention to? Oh, I forgot to state that the engine is the original and has never been touched (opened) and has some 3000 + hours. Another question - it has bronze seacocks which look ok but the sea water intake and filter look bad and leak and the rest are the boat's original. Should I replace them or just clean them up? Where can I find the seacock with the filter for the engine intake? Thanks in advance to all replyers. Ron
Atraxia is offline   Reply With Quote
Old 25-02-2010, 06:17   #2
Registered User
anjou's Avatar

Join Date: Apr 2009
Location: Malvernshire, on the sunny side of the hill.
Boat: 50' steel canal and river cruiser
Posts: 1,905
Are there any old aero start cans lurking round the bilge?

Most diesels of this era knock a little when cold but should stop after 10-15 seconds.
Stubborn starters are often adicted to ether once someone has got them hooked and that causes the knocking.
anjou is offline   Reply With Quote
Old 25-02-2010, 06:34   #3
Registered User
S/V_Surya's Avatar

Join Date: Mar 2009
Location: Sasafra river,MD
Boat: gulfstar ketch 41 Surya
Posts: 667
I have a 4107 and there is no loud knocking. Do not know about seacocks. Mine are brass and I serviced them last year and inspected. In assume they are plug valves. Do they turn easily, have they been lubricated, how do the hose attachments look?
S/V_Surya is offline   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Perkins 4-108 Steve Kidson Engines and Propulsion Systems 58 03-07-2016 12:56
Need: Perkins 4-108 rusconigiorgio Classifieds Archive 11 16-09-2009 09:04
Looking for used perkins 4-108 sailboatvern Classifieds Archive 8 30-10-2008 18:56
Perkins 4.108 cburger Engines and Propulsion Systems 13 25-10-2008 18:12
Perkins 4.108 cburger Engines and Propulsion Systems 8 11-05-2006 10:31

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:25.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.