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1976 Ski Tique |
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swifty 
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Joined: April-27-2007 Location: United States Status: Offline Points: 15 |
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 Topic: 1976 Ski TiquePosted: April-27-2007 at 6:26pm |
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Does anybody know what oil should be ran in a 76 302? And i noticed that when out cruising on the lake there is always a slight humming noise with the hull. Is this normal?
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8122pbrainard
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: April-27-2007 at 6:43pm |
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I run 10w40 in mine.
There are always harmonics in any boat but you may want to check your drive line to make sure it's aligned, the shaft is straight, the strut bearing is good and the prop is ok |
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nuttyskier2002
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Joined: September-28-2005 Location: United States Status: Offline Points: 669 |
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Posted: April-27-2007 at 10:17pm |
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When does the humming occur? At what RPM? Is it more like a churning sound or a buzzing sound? Do you have excessive engine vibration?
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95 Malibu Echelon w/Mercruiser 350 Magnum Skier
Former boats: 88 Ski Centurion Tru Trac II 59 Chris Craft Capri (woody) |
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acpskitique
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Joined: April-10-2007 Location: United States Status: Offline Points: 51 |
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Posted: April-28-2007 at 8:44am |
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Swifty,
I've got a '76 tique as well, and I have the same vibration issues. I'm in the process of checking my shaft alignment and prop. Do a search on "transmission alignment" and there's a good thread started by Eric Lavine with pics on how to do it. I would go with 10W40. These motors were recommended to run on 40W by PCM, however that was when multi-grade oils were not very good quality. Now it helps to have the oil a little thinner on start up, and that's what the 10w quality does. I put regular valvoline in mine. Don't go full synthetic unless you've recently rebuilt the motor. |
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'76 Ski Tique 302PCM
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swifty
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Posted: April-30-2007 at 12:03pm |
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The humming is any time past 10-15 mph. It is just a humm. If you put your hand on the side you can feel it but nothing to severe. Just wondering if i should worry about this.
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swifty
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Posted: April-30-2007 at 12:04pm |
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Its a buzzing sound.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Posted: April-30-2007 at 12:07pm |
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Never hurts to check the alignment. I even think Eric has said it's not a bad idea to check it every year after it's been in the water for a couple days.
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rudderdad
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Joined: April-30-2007 Location: United States Status: Offline Points: 44 |
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Posted: May-02-2007 at 11:19pm |
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Have had this before from a poorly glassed wood piece under the gunwale, behind the shifter. The looser it gets, the louder it gets.
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rudderdad
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