1976 Irwin 37 cc with exhaust issues. - SailNet Community

   Search Sailnet:

 forums  store  

Quick Menu
Boat Reviews  
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Hatches and Portlights
Interior And Galley
Marine Electronics
Other Items
Plumbing and Pumps
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here

Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
Old 08-02-2007
Junior Member
Join Date: Nov 2006
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Irwin37mkIV is on a distinguished road
Unhappy 1976 Irwin 37 cc with exhaust issues.

My Perkins 4-108 engine manifold is on the port side. The anti-syphon loop is dry andcrosses over the transmission to starboard, befor water cooling is supplied on the downflow to the perolating muffler. The muffler discharge crosses back over the transmission to port goes below the hall floor forward to midship and then up to discharge midship on the port side at the water line.

This creates a lot of heat in the engine compartment because cooling doesn't take place immediately after the manifold, and also creates a wet loop after the muffler creating a fair bit of back-pressure. It is difficult to get at the exhaust thru-hull which has no sea **** as access is limited by a small hatch near the aft end of the port setee and to port of the DC electrical distribution panel. Servicing an exhaust hose leak in this area will be next to impossible in an emergency.

Was this the original exhaust configuration for the boat? Piping seems to have been altered in the engine compartment, and I can't tell if this was an attempt to improve the situation, or somebody's attempt at a repair?

I've thought of taking the exhaust to the stern, but this makes for an equally long run with a wet loop aft of the muffler. Discharging at midship on the starboard side at watter line to avoid all the cross-overs may also be problematic, as I have yet to figure out how to make it past the galley or aft washroom.

Discharging near the engine compartment will result in a thru-hull about 2' below water.

Has anyone with a similar boat tackled this issue, or have any thoughts on the matter? Replies welcome.
Reply With Quote Share with Facebook
Old 08-02-2007
sailingdog's Avatar
Telstar 28
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice

Sounds like a PO royally screwed the setup on the exhaust. Photos with a bit of a diagram of what goes where would help a lot... and then, maybe we can give you a bit more applicable advice.

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

óCpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
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

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
Irwin 43' center cockpit exhaust hoses access grsr Irwin 9 05-21-2008 05:11 AM
1967 Irwin 37 cc with exhaust problem Irwin37mkIV Irwin 5 08-02-2007 07:03 PM
Yanmar YSB8 issues oft Gear & Maintenance 7 09-24-2006 04:49 AM
Diesel Exhaust Systems Sue & Larry Gear and Maintenance Articles 0 11-07-2001 07:00 PM
Cat30 Exhaust riser blew up - Engine won''t start E_N_Z_O Gear & Maintenance 2 07-31-2001 06:55 PM

All times are GMT -4. The time now is 10:44 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.