Recent content by backacres

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    How often should impeller be changed?

    Hi All - I've heard that the impeller should be changed every other year (Merc. 3.0 L w/Alpha I Outdrive in fresh water). How true is this? The reason I ask is because it's going on the "every other year" for my boat. I changed it when I first purchased it used--the owner told me that the...
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    Making My Own Boat Cover

    My wife has “volunteered” to make a new bow cover for our boat. I plan to purchase the Sunbrella marine fabric for this task. My wife is fully capable of everything on the sewing end, but we have no experience with the snaps. I was wondering if anyone had information on how to properly install...
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    3.0L rattling/knocking noise coming from the engine

    Hello All, I have an 87 3.0L w/Alpha I outdrive. The past couple of times out, I noticed a rattling/knocking noise coming from the engine (definitely the engine, not from the outdrive). It occurs under load, while pulling a skier for example. The engine performance seems unaffected though. The...
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    1987 3.0L Merc. Timing Specs.

    Could anyone please confirm that I have the right timing specifications for a 1987 3.0L Mercruiser, Engine S/N 0B647030:<br /><br />6 deg. BTDC @ 650 - 700 RPM in gear, <br />28 - 34 deg. Dwell<br /><br />These are from Service Manual #10. I beleive I have the right one for this S/N, but have...
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    Alpha One, Gen. II Questions

    Hi all -<br /><br /> I helped a friend with a pump rebuild and U-joint/spline shaft lube on a 98 Merc. Alpha 1, Gen. II this past weekend and had some questions. I have a Gen. I and noticed some differences other than the obvious (water pump).<br /><br />1) There was no grease fitting on the...
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    Shift Shaft Slide Stabilizer Tool

    Hi All - <br /><br /> I have promised a good friend of mine a water pump rebuild and a gimball bearing/spline grease job this spring in return for some favors. He has a 1998 Mercruiser 3.0L with an Alpha One Generation II.<br /><br /> I have done this job on my own boat (1987 Mercruiser 3.0L...
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    Anti-freeze sucking slowly into the engine

    I have an 87 Four Winns 190 Horizon (3.0L Merc. w/Alpha 1)that I have winterized myself for the past two years with no problem. After everything else is done, I start the anti-freeze process. I have a garden hose cut to a 3' length that I attach to the muffs and fill with anti-freeze prior to...
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    Water entering bilge.

    Hi Everyone,<br /><br /> I have a 1987 Four Winns 190 Horizon, 3.0L Merc., w/Alpha 1 outdrive. I have water coming into the bilge from the bottom of the transom drain. Reading some of the previous posts, I took the advice and got down in there w/a mirror and a flashlight and sure enough, I could...
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    What RPM should I be at when adjusting timing?

    Hi Guys,<br /><br /> I have a 1987 Merc. 3.0L and the manual states that the timing should be 6 deg. BTDC. I assume that I should be checking this at idle, but not sure of what the RPM's should be: 700-800??<br /><br />Thanks for the help!!<br /><br />Jeff :cool:
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    How oftern should you change the water impeller?

    Hi All,<br /><br />I was wondering how oftern the water impellers should be changed. I am a new owner of a 1987 Four Winns 190 w/Alpha 1 outdrive and have no idea when it was changed last. The boat runs great right now, and has no problems overheating. I was just curious if anyone had any...
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    Point Gap Specs for 1987 3.0L

    Hi All! I am a newcomer and found lots of valuable information on this site! I have a 1987 Merc. 3.0L, S/N 0B647030, and I am interested in finding out the point gap and timing specs. From the Mercruiser service manual #10 (Delco Distributor) they list the point gap at 0.022" and the timing at...
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