Atlantic Marine
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=38151
Printed Date: October-07-2024 at 12:24pm
Topic: Atlantic Marine
Posted By: AussieRy
Subject: Atlantic Marine
Date Posted: February-22-2016 at 7:23pm
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Hey Guys, New to CC Fan, but seems like a great resource. Ive enjoyed watching from the sidelines for a few weeks. Here is the story.... looking for some advice. I recently picked up a 90 Ski Nautique that may need a new engine. If not now, then at some point down the road. I have a low cold compression in one cylinder, all the others tested great. The boat sat in Cali for a few years, but only has 300hrs total on it, so I remain hopeful. Im going to fire it up this week once I get everything ready on it, and am hoping to get a better reading after it runs a little. fingers crossed. Since I want to get up and running for the summer ASAP I am working my "plan B" which is to either restore the current engine through a local machine shop or purchase a remanufactured long block from one of the many I see online. I have seen comments on this forum about a lot of the suppliers (rapido, Jasper, Summit, US marine etc) but don't see anything about Atlantic Marine out of Florida. Does anyone have any experience with them? Looking for some advice so I can be back out on the river come March! Cheers, Ryan ------------- 1990 Ski Nautique |
Replies:
Posted By: 8122pbrainard
Date Posted: February-22-2016 at 8:39pm
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Ryan, Congratulations on your purchase. I suggest getting the engine running and then evaluate just how bad that one cylinder is. You didn't mention the actual results of your compression test but there sure is a chance you can run it as is. Then, when you have more time, pull the engine for a rebuild. Welcome to CCfan and since you have been with us for a couple weeks, you know we always ask for pictures!  ------------- /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: AussieRy
Date Posted: February-22-2016 at 8:55pm
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You're right, I knew that was coming. #6 is reading 70psi. The rest I believe were around 110-120 Here are some pics taken the day I picked it up. before it got a detail. Currently in the workshop. Cheers, Ryan    ------------- 1990 Ski Nautique |
Posted By: Gary S
Date Posted: February-22-2016 at 9:07pm
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Ryan it's a long way to California from Florida as you know, what happens if you run into trouble? I would google Atlantic if I were you. I have seen them at the Miami boat show,they have a slick catalog and presentation. Inboards are rare in the area here,I/O's even more so- so there is no one around here to ask. You might have a bad head or gasket and only require a head change or rebuild. A leak down test will help confirm better than a compression test. ------------- 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: AussieRy
Date Posted: February-22-2016 at 9:25pm
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Thanks Gary - good thought. I just assumed the rings due to the time it was sitting, but could be something else. can't wait to find out and get it right! Ryan ------------- 1990 Ski Nautique |
Posted By: 8122pbrainard
Date Posted: February-22-2016 at 9:47pm
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Ryan, Looks great. Thanks for the pictures. Gary's idea is a good one. Get back to us with the results. I'd also run the compression test again but warm. Do it once and then again with some Marvel Mystery oil in all the cylinders. Did the PO have any input on the bad cylinder? With very little time between now and when you want to put it in the water, I'd be inclined to use it as is no matter what you may find with the #6. ------------- /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: 63 Skier
Date Posted: February-22-2016 at 10:01pm
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Nice looking boat! That's a classic color scheme from those years, really like it. Yes, might as well run it. You may get lucky and the cylinder seals better with some running, but not likely to do any harm. Did you take a look at the oil, nice and clean and no milky look? ------------- '63 American Skier - '98 Sport Nautique |
Posted By: Orlando76
Date Posted: February-22-2016 at 10:08pm
Geez, I think you bought my old motor. I had the same compression numbers with 6 being my bad cylinder too on a 485 hour motor. i was amazed at how strong the motor ran with the bad cylinder, I never would've changed motors but it would vibrate just enough the be noticeable from 600-1200 Rpms, after that it ran like a dream. I ran it like that for 9 months. Bought a rebuild from Summit due to previous super experience with another motor I purchased from them. ------------- Please support The Cystic Fibrosis Foundation 1976 Ski Nautique 351 Escort 1993 Ski Nautique purple and black 351 HO PCM |
AussieRy wrote:Posted By: 74Wind
Date Posted: February-22-2016 at 10:14pm
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Cali. Ironic.....,a friend from California was just chastising someone for using that word that word at a party yesterday. Said (which I've heard before from others) Native Californians never call it Cali and it's a surefire way to tell a newbie......... Seems like a great chance to test the theory. Are you a native? ------------- 1974 Southwind 18 1975 Century Mark II |
Posted By: AussieRy
Date Posted: February-22-2016 at 10:28pm
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Its the curse of where I am from - Australia. We have a habit of shortening words. Although I have lived here for over a decade so I should know better. I think your theory holds water. ------------- 1990 Ski Nautique |
Posted By: tryathlete
Date Posted: February-23-2016 at 1:37am
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Welcome AussieRy! Keep us posted on that funky cylinder. Head gasket, rings a little rusty, sticking valve or lifter, none of this is very tough to fix. Sure one possibility is a bad cylinder, but that's only one possibility. Low hours bodes well for simple stuff. Get her out on the open water and use her for a few days. Run that compression test again warm like others are saying. Save up those frequent flier miles and come to Green Lake this Summer. |
Posted By: Duane in Indy
Date Posted: February-23-2016 at 7:01am
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I personally don't put much faith in compression checks. For one thing there is no base line number to go by. In other words all cylinders can check within 5 pounds and ALL could be weak. The best way IMHO is to use a leak down gauge as others have suggested. A compression gauge only shows how much the cylinder compresses the air (hence the name). It does NOT show how long the cylinder holds pressure. By using the leak down gauge it will check the condition of all the components within the cylinder. By listening to the leakage you can determine what the problem is likely to be. Hissing noise in exhaust is exhaust valve issue, in carb it is intake valve, crankcase breather hissing would be rings. We leak our Nitro Funny car after every pass. (Usually blown up but just maybe we only have to pull one head) Long post but this gives you an idea. Even cheap harbor freight gauges will work. Duane ------------- Keep it as original as YOU want it 1978 Mustang (modified) |
Posted By: 74Wind
Date Posted: February-23-2016 at 8:24am
Duh...I should have guessed it by the name AussieRy. ..  ------------- 1974 Southwind 18 1975 Century Mark II |
Posted By: ScottZ
Date Posted: February-23-2016 at 11:15am
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Nice looking boat. My brother had one identical to it. ------------- Scott Zuelzke Lake Mitchell , AL 1984 Ski Nautique 1972 Skier |
Posted By: AussieRy
Date Posted: February-23-2016 at 3:48pm
Unfortunately the previous owner didn't know about the cylinder, but also didn't let me know about a lot of stuff. ha ------------- 1990 Ski Nautique |
Posted By: AussieRy
Date Posted: February-23-2016 at 8:51pm
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Thanks everyone for your insight on this. I still want to run a leak down test to see where I am really at, but I did manage to get her started today and got the compression back too! Ran it for 2 minutes and read low 90s in the bad cylinder. Could not be more relieved and anxious to get out on the water. here is an attempt at a link to the startup. https://youtu.be/a8wpwvQgn68" rel="nofollow - link ------------- 1990 Ski Nautique |
Posted By: 63 Skier
Date Posted: February-23-2016 at 9:07pm
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Good news! I'd say after about another 1500 hours you ought to consider a rebuild! Hard to tell with the audio, but am I hearing an exhaust leak somewhere? First I thought it was a ticking sound, then thought exhaust, but not sure. ------------- '63 American Skier - '98 Sport Nautique |
Posted By: AussieRy
Date Posted: February-23-2016 at 9:11pm
yeah, i might have jumped the gun on the rebuild. ha ------------- 1990 Ski Nautique |
Posted By: Blamey
Date Posted: February-24-2016 at 10:02am
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AussieRy, I'm in a similar boat to you (pun intended). Last year I was looking at a 95 sport, did a compression test and numbers were very similar to yours. Mostly around 120 with one cylinder at 90. Got the advice on here that if it still runs well its not really a problem. Did a test drive and the boat ran great. Got it up too 43 mph, which isn't too far off what it would do new. So I bought the boat. Got it for 7k without a trailer. I got the boat last fall and have been sprucing it up with minor improvements. Cleaned and waxed it, got a few small replacement parts, adding perfect pass stargazer and got all the seat bottoms replaced. The boat wasnt being used much in the last few years and apparently wasnt used at all last year. I'm going to run it this summer then get the engine checked out again once I've put a few hours on it. I have driven the boat a total of about 2 hours before putting it away and can't wait to put it back in the water and get it going soon. ------------- 96 Super Sport Previously: 95 Sport Nautique, 1980 Ski Supreme |