Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Aftermarket Kits and Accessories

Reply
 
Thread Tools Display Modes
  #1   IP: 159.18.221.197
Old 09-04-2007, 11:02 AM
Bob.Griffin Bob.Griffin is offline
Senior Member
 
Join Date: Jun 2007
Posts: 46
Thanks: 0
Thanked 4 Times in 4 Posts
Indigo Crankcase Ventilation Kit

I already sent an inquiry to Indigo but thought I'd also check with the A4 community experts as well.
I purchased the Indigo kit and installed it last weekend, and it seems to work, although I havn’t tested it on a long engine run yet. However, there was one problem encountered during the installation. The spacer plate did not properly match up with either the carburetor flange or the inlet manifold. I tried to use the 2 replacement studs supplied with the kit but couldn’t get them both to fit due to an alignment problem of about a 1/16 inch difference between the carb, spacer plate and manifold (spacer plate is slightly smaller). When I ordered the kit I did indicate that I have an early model carburetor (cast iron with the ‘Zenith’ name running vertically down the main barrel, plus adjustable main jet) that someone before me installed on a late model engine (oil filler above the flywheel casing and on the manifold side). They also went to the trouble of installing the scavenge tube on this carb which runs from the bottom of the carb on the flame arrestor side, up to the inlet manifold. I’m wondering if there was a slight difference between flanges on both early and late carbs. Anyway, I temporarily fixed by using a smaller diameter nut and bolt instead of one of the supplied studs. I would obviously like to fix this by using both proper studs, any thoughts from anyone?
Reply With Quote
  #2   IP: 159.18.221.197
Old 09-04-2007, 03:49 PM
Bob.Griffin Bob.Griffin is offline
Senior Member
 
Join Date: Jun 2007
Posts: 46
Thanks: 0
Thanked 4 Times in 4 Posts
Don, I'm hoping you can comment on this anomoly. I just got a response from Tom at Indigo who can't understand why the spacer plate doesn't fit since it's the same for both early and late model carbs. Either the plate isn't to spec or I somehow have a hybrid carb and inlet manifold, both are unlikely. Tom suggested I use 2 x 1/4 inch nuts/bolts, which I probably will, but it's still a mystery.
Reply With Quote
  #3   IP: 38.118.52.41
Old 09-04-2007, 08:48 PM
Don Moyer's Avatar
Don Moyer Don Moyer is offline
 
Join Date: Oct 2004
Posts: 2,811
Thanks: 0
Thanked 183 Times in 124 Posts
Bob,

Sorry, but I can't solve the mystery. We've installed many Indigo Electronics crankcase ventilation kits on both early and late model engines, and we're not aware of any difference in the dimensions of the carburetor to manifold flanges. For what it's worth, I measure a nominal 2.25" center to center on the carburetor/manifold flange bolt spacing.

Don Moyer
Reply With Quote
  #4   IP: 159.18.221.197
Old 09-05-2007, 10:12 AM
Bob.Griffin Bob.Griffin is offline
Senior Member
 
Join Date: Jun 2007
Posts: 46
Thanks: 0
Thanked 4 Times in 4 Posts
Tom also indicated it was 2.25 inches between centres. I will check this coming weekend.
Reply With Quote
  #5   IP: 206.230.48.34
Old 09-05-2007, 01:26 PM
tenders tenders is offline
Afourian MVP
 
Join Date: May 2007
Location: Harlem YC, City Island, NY
Posts: 1,439
Thanks: 46
Thanked 259 Times in 170 Posts
"Centres?" What are you...Canadian or something?

(Not that there's anything wrong with that. I'm 1/4 Quebecois myself.)

Maybe you have a Stevedore rather than an Atomic Four? Seems to me I recall reading somewhere the difference is some sort of a restriction in the carb limiting the engine to 25 HP to avoid triggering a Canadian import tax or prohibition.....?
Reply With Quote
  #6   IP: 74.218.125.206
Old 09-05-2007, 10:43 PM
msmith10's Avatar
msmith10 msmith10 is offline
Afourian MVP
 
Join Date: Jun 2006
Location: Columbus, Ohio
Posts: 474
Thanks: 19
Thanked 62 Times in 46 Posts
Not a Stevedore problem

I don't know about Bob Griffin's problem, but I do know that it's not a Stevedore problem. The Stevedore used the same carb. There was a steel ring which was pressed inside the intake manifold which narrowed the diameter of the intake above the carburetor. The carb itself was the same as a regular A4.
Reply With Quote
  #7   IP: 159.18.221.197
Old 09-06-2007, 04:35 PM
Bob.Griffin Bob.Griffin is offline
Senior Member
 
Join Date: Jun 2007
Posts: 46
Thanks: 0
Thanked 4 Times in 4 Posts
Canadian and proud of it!

Definitely an A4, late model (1970) but previous owners did make several changes such as installing an early model carb and replumbing the oil pressure switch to combine with the oil pressure sender unit. I plan to check the centers (!) this weekend. All I do know is that when I screw the 2 studs (provided in the crankcase vent kit) into the carb flange, the spacer will not fit over the studs, but the new gaskets do.
Reply With Quote
  #8   IP: 66.161.32.165
Old 09-07-2007, 04:52 PM
luvmyi36 luvmyi36 is offline
Senior Member
 
Join Date: Jun 2007
Location: Carlsbad, Ca
Posts: 117
Thanks: 0
Thanked 0 Times in 0 Posts
[QUOTE=tenders;5939]"Centres?" What are you...Canadian or something?

Now that's funny!!!! About fell out of my chair laughing!
__________________
Jim
S/V Cayenne
1975 Islander 36
www.betterbmp.com
Reply With Quote
  #9   IP: 69.138.78.82
Old 09-08-2007, 08:10 AM
MikeB.330's Avatar
MikeB.330 MikeB.330 is offline
Senior Member
 
Join Date: Jun 2006
Posts: 247
Thanks: 0
Thanked 4 Times in 4 Posts
how about using a file to egg out the holes a little bit.
As long as the gasket seals against the manifold is should be fine. In a pinch one time I repaired a broken carb flange with JB weld. I still have that carb as a spare.
Reply With Quote
  #10   IP: 159.18.221.197
Old 09-10-2007, 09:19 AM
Bob.Griffin Bob.Griffin is offline
Senior Member
 
Join Date: Jun 2007
Posts: 46
Thanks: 0
Thanked 4 Times in 4 Posts
Don, I was at the boat on the weekend and measured both the spacer plate and carb flange, spacer plate was 2.25 inches between centers (note spelling!!) and the carb flange was 2.375 inches between centers, an 1/8 inch difference. I also confirmed the carb is a Zenith early model but no indication why it does not have the standard 2.25 inches between centers, the mystery remains. I drilled out the spacer plate holes until it fit over the studs and is now working as it should. Thanks for suggestions everyone.
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cabin fumes timbremac Aftermarket Kits and Accessories 51 04-10-2014 08:27 PM
Crankcase Vent Pipe Bob.Griffin Safety 2 08-19-2007 09:49 PM
Offer Indigo's crankcase ventilation system (or similar) tenders The Wish List 0 06-28-2007 11:44 AM
wanted: Indigo Propeller skhorleb Wanted to Buy - Engines and Engine Parts 0 06-25-2007 09:35 AM
PCV valve (Indigo) question Marty Levenson Aftermarket Kits and Accessories 1 02-18-2005 10:33 PM


All times are GMT -4. The time now is 05:34 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved