Yard Gnome
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=19677
Printed Date: November-21-2024 at 7:06pm
Topic: Yard Gnome
Posted By: flipflop
Subject: Yard Gnome
Date Posted: October-06-2010 at 3:02pm
|
Sorry if I'm wearing out my welcome, but its nice to get a post out there while i'm working on things to smooth out the process. Thanks for the help.
I am getting a noticeable white smoke at start up from the exhaust. This is new from my overheat two weeks ago. The air temps have gotten a little cooler, but I doubt thats the problem here in Florida. I am worried about the potential problems after reading Vondy's S.O.S. thread. . My exhaust manifolds are very hot. My temperature gauge reads about 170-180. I have the 160 t-stat, but plan on replacing with the 140 soon. I am getting good suction at my raw water pump from the bucket test. I was thinking about removing the exhaust manifolds this weekend, cleaning them up, and checking for leaks. They are pretty corroded by the exhaust ports. When does water usually mix with the exhaust? Is there a separate channel in the exhaust manifold for the water and exhaust? Thanks. |
Replies:
Posted By: 8122pbrainard
Date Posted: October-06-2010 at 3:52pm
|
James,
Water enters the exhaust after the manifold. Depending on the manifold style, after the manifold is ether a "riser" or a exhaust "elbow" and that's where the water enters. The manifold itself has different cavities for the water and the exhaust. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Gary S
Date Posted: October-07-2010 at 2:31am
|
James,have you or others been running in salt water? Those cast iron exhausts can corrode inside and start closing up the passages. You might buy some time on them by submerging them in acid after you take them apart.I don't remember what acid,but I'll find out by tommorow. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: flipflop
Date Posted: October-07-2010 at 12:06pm
|
It was on a private fresh water lake for the last 10 years, but I do not know for sure.
The corrossion is pretty bad. I'll take some pictures when I have them off. I'm also going to drain the block to see if there is any debris in there. I'm still getting inconsistent temp. readings. 160 - 180 + on the hose. Higher when I shut it off after its been running. Timed the engine the best I could without the tach working. Sounds better. |
Posted By: kapla
Date Posted: October-07-2010 at 3:19pm
|
you have a carb engine..if so the correcto t is the 143..it will lower the t to the 150-160 range...
As for t raising after shut off and restart I find it normal, as water stop circulating inside the engine and gets hot..See that after some seconds of restart t goes down inmediately.... My exhaust were pretty corroded and blocked even in the fresh water enviroment i use it..I used muriatic acid to remove the rust scum..and also a lot of scrubbing, wire brush, sandblast etc... 
------------- <a href="">1992 ski nautique |
Posted By: flipflop
Date Posted: October-07-2010 at 4:41pm
| Looks just like mine. Will probably be going down the same road. Thanks for the info. I have the same manifolds and risers. I will probably order a new gasket set from skidim. We'll see. |
Posted By: eric lavine
Date Posted: October-08-2010 at 10:05am
|
just to let you know, if the risers are leaking on the outside it means they are also leaking on the inside
i tore a merc set apart yesterday, sandblasted the sht out of them and then went to town on the belt sander on the gasket surfaces (benchmount not portable) works well and saved the entire set, the good thing about the bench top is you can really hog some material off the faces to get to a new clean useable surface ------------- "the things you own will start to own you" |
Posted By: eric lavine
Date Posted: October-08-2010 at 10:12am
|
to add, you need the gasket that blocks off the back port, someone can confirm or deny ------------- "the things you own will start to own you" |
Posted By: 8122pbrainard
Date Posted: October-08-2010 at 10:23am
|
Eric,
You need a mill!!  There are literally thousands of used Bridgeports available in the used market. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: C-Bass
Date Posted: October-08-2010 at 12:23pm
|
Yeah I would think you could snag a used Bridgeport fairly cheap. When I was up at IMTS a few weeks ago, I was shocked how many booths had new Bridgeports for sale...like that was cutting edge technology worth bringing to IMTS. ------------- Craig 67 SN 73 SN http://www.correctcraftfan.com/diaries/details.asp?ID=6103" rel="nofollow - 99 Sport 85SN |
Posted By: eric lavine
Date Posted: October-08-2010 at 2:40pm
|
Pete, i have one, to much set-up time on the manifolds...im built for speed. the belt sander is the cats ass, ------------- "the things you own will start to own you" |
Posted By: Gary S
Date Posted: October-08-2010 at 11:24pm
Yea Pete,it's not like he works for a utilty,time is money  ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: flipflop
Date Posted: October-10-2010 at 10:33pm
|
Update
My yard gnome made its first successful voyage today. About a two mile, 30 minute trip, w/ max speeds of around 30-35 mph. Didn't open it all the way up, but ran smooth with no problems. Can't wait for next weekend. Overheat issue resolved for now I found a ball of impeller debris on the intake side of the water pump. It was about the size of a penny. No way I overlooked that when changing the impeller. Not sure where it came from. Manifolds Going to wait on removing the manifolds for now. Steam issue isn't consistent enough to start removing a bunch of stuff. I'm going to wait and see if it becomes worse. Next step More tuning and minor trailer repairs. Other Stuff I'm kind of a mess at the dock. My steering is really stiff and its hard to navigate the boat onto the trailer. Maybe I'll get better with practice. Also, I added about 1/2 qt of Risole to the oil and fogged the fuel system with sea foam. I figured its been sitting for a while and needed some cleaning. My oil pressure dropped to 40-50 from 50-60. Will be back with more tuning questions. |
Posted By: TX Foilhead
Date Posted: October-11-2010 at 7:00pm
| Start reading up on steering cables, sounds like you might be needing one. |