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  1. L

    What is this filter on the ignition power wire?

    I’m trying to chase down an electronic noise issue and I noticed this in the diagram and my wire has a butt-connector no filter. What is the filter? An inline cap? Resistor?
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    Doesn’t go straight, left to right back and forth at idle?

    So when I’m cruising around the canals at /no wake speed. The boat seems to hunt left to right constantly with no input at the steering. It more or less goes straight, but it’s like back-and-forth back-and-forth back-and-forth. I uploaded a video, but it is not quite as apparent with just me on...
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    3.0 popping ignition fuses, coil?

    Had a group out in the water and was underway at 75% power for like 15-20min and the boat just shuts off. Found the ignition fuse (#2 on sea ray 180) blown. Think it was a 15amp? Took me a few minutes to figure out that’s what it was, I installed a sniper efi recently so I thought that was it...
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    Serial number not correlating. What timing to use? Choke on power wire?

    I just got done installing a sniper efi on my 3.0l. Want to double triple check I have the timing dialed in. According to the book there are one of three to use. The trouble is I can figure out what my serial number translates to. It M023026 and that is nothing like the ranges listed. Also I...
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    Replacing shift cable. What are these parts for?

    I just got a GLM21450 shift cable kit and I’m a little unsure what these parts are for. The plastic watcher the little metal wire and the orange plastic piece.
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    At wits end Runs great for 20miles then knocking then sputtering 3.0

    I have a 3.0 that I’m ready to sink. Here is where I’m at. New plugs, wires, cap, rotor. New carburetor from national carburetors. New fuel filters, the big spin on one and the little one in the bottom of the fuel pump. New drive unit water pump. Timing has been set by the book. On my last out...
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    Bearing clearances and roller vs linked chain 5.7

    So I picked up a truck motor to replace a locked up engine on a project I have. It’s a 97 vortec 5.7. The truck motor had 170k on it. Im going to reseal it with a gasket set and putting new rod/main bearings and a new oil pump in. The old bearings are not terrible but they do have a few...
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    Advice on 5.7 mercruiser/vortec replacement

    I’ve just picked up a project with a bad motor. The story goes it started overheating and they kept driving to get back to the dock. Then it wouldn’t turn over after the shut it off. Just got the motor out and it’s full of water and it’s been sitting for about 6 months and it was brackish water...
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    2brl mercarb to Holley 2brl?

    Would some of you wiser folks know what the base flange of the 2brl mercarb for a 3.0 is based on? I’ve been looking at the Holley sniper marine 2brl conversions and thinking I might pull the trigger if I can find an adapter plate for it.
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    Engine starts to sputter/breakup/lose power after warm 3.0 ‘98

    I have a MerCruiser 3.0 that is giving me some troubles. For the first 5 to 10 minutes of Cruising at 75% throttle it runs great a smooth. Then it starts to miss a bit Then it starts to miss a lot and slowly loses power. When I pull power back it still does it at a lower speed once it starts...
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    Removing exhaust elbows without removing riser? 4.3

    Is it possible to remove the exhaust elbows without removing the risers? I’m not having any luck.
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    Importance of exhaust flaps 4.3?

    So I just got done fixing the shifter linkage in the gimbal and Drive unit. While I had it apart I found a piece of the exhaust flap from one of the exhaust headers down by the shifter rod in the exhaust exit. How important are these for operation? I’d really like to take the boat down to the...
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    Alpha one stuck in neutral?

    I have a new to me 4.3 mercruiser. Just got the motor fired up but and now on the drive. It’s stuck in neutral. I’ve read on here that if the cable is stuck to cut it at the bellows but I can hear the cable trying to move in the lower unit so I’m thinking the selector in the lower unit is stuck...
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    4.3 oil leak when running after changing exhaust manifolds

    My cousin has a new to him deck boat with a 1996 4.3 MerCruiser in it. We ran the boat prior to changing out the exhaust manifolds and it ran great with no leaks. My cousin replaced the manifolds and on the first test ride out the engine just seem to be dumping oil into the bilge. I wasn’t...
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    MerCruiser 3.0 valve adjustment by the book 0 compression

    Ive had a slight valve click so I thought I would go ahead and attempt to adjust my valves while “ Social distancing” I’m trying to do the valve adjustment on a 3.0 MerCruiser. I’m doing it by the book number one at TDC and adjusting intake and exhaust on the identified valves. Then turning...
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    4.3 one exhaust elbow hotter than other?

    I have a new to me 1996 4.3 L MerCruiser. The boat was given to me by an older gentleman who’s a friend of a friend that said he was told the exhaust manifolds were bad and that it had some electrical gremlins. I got the electrical sorted out and I got the boat up and running. The manifolds...
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    What’s this thing? 3.0 mercuiser coil/dist wire

    Is this like a resistor or a fusible link? I looked at just getting a replacement harness but they’re like 50 bucks. Is there any harm in just patching it with a piece of wire to get me out on the water?
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    A big thanks to the group that post here

    Several months ago I bought a smoking deal on a Sea Ray 180 for my son an I to fix up. Was described to have had a head gasket leak and ended up being a flooded motor that was run and resulted in a rod knock. Anyways a few nights and weekends later and several searches and post on here I took my...
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    Best pre war Chris craft runabout forum/resource?

    Just purchased my dream project and this forum has always been a great help with my various newbie questions. I've sone some googling on the subject but a few of the sites seem to be paid only sites (which I'm fine with) was just wondering if any of you seasoned pros could suggest a few of the...
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    Confused: 3.0 Idle adjustment w/carb disconnected in gear or neutral?

    So I'm reading the manual and on 5b-14 it says... With boat in open water, place remote control in forward gear, idle position. Disconnect throttle cable barrel from anchor stud. Be sure not to lose spacer on anchor stud. Adjust idle speed adjustment screw to obtain 550-600 rpm, in neutral...
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