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    Seized engine

    2016 383 stroker with 20 hours Last years I ran the boat from the marina to the ramp with no issue. brought the boat to the house drained the water from the manifolds, block and stored it. This is year the engine is locked up. Is that possible? I removed the lower unit and the engine is...
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    lower unit hose

    hello, I have a 1998 350 mercruiser with Alpha one outdrive I noticed the lower unit reservoir is empty and the oil is in the bilge. I saw the hose that connects to the lower unit from the reservoir (on the back of the engine) is loose. what's the best way to get back in there and make...
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    Distributor

    have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 When installing the distributor shaft do I want the engine on tdc or at 10 degree?
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    Stall at WTO

    Good afternoon I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 New rotor, new plugs and wires. The distributor was replaced last year It runs great at idle and when I slowly accelerate/rave it up in neutral. When at WTO it stalls and knocks. I believe the...
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    Motor and distributor rotation

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 Is it a right (clockwise) or left (counter clockwise) hand rotation? Thanks in advance Claudio
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    Timing and gap

    Good evening, I am in need of the following info: timing procedures and spark plug gap. I purchased ac delco plugs ( mr43lts) I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 Thanks Claudio
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    Performance

    I have a 1998 mercuries 350 EFI MPI Engine Serial Sterndrive OL153367 at the moment I have all stock parts but I would like to improve performance (top speed). what are some parts I should (if any) look in to changing?
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    Not getting out of the hole

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 the boat sounds great it runs good at low speed however this weekend I had two extra small people on the boat and it would not get out of the hole. when it was at full throttle it felt like it was only at 1/2...
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    Tps

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 Are there specific steps to replacing the tps? Is there an adjustment?
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    Fuel Injector

    1998 Mercruiser 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I lost number 7 fuel injector today. due to the upcoming holiday weekend I am afraid I will not be able to find one available. is there a car fuel injector that cross references? I know that's not right, but I need to...
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    timing issues

    1998 Mercruiser 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I have set the timing at 8 degrees from TDC. Getting the following symptoms: slow out of the hole from WOT and top RPM's are 4900. When I forced advanced the distributor cap about an inch (on the water, with no timing...
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    slow to reach 3000 rpm

    1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 On the water today, the boat was slow to reach 3000 rpms from WOT but thereafter the rpms climb was normal. she topped at 4800 rpm but I think it should have been in the 5200 rpms range. on a another note, she couldn't...
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    a little help needed

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I have installed two batteries using a blue sea ACR and switch (position Off, one and combined). I have the house hooked to the deep cell battery (numb. 2) and I have a starting battery hooked up to crank the...
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    red wire on the starter

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 there is a red wire (14-16 gage) with an inline fuse that connects to the starter selenoid. can someone tell me what's it for?
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    Timing question

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I set the timing this morning for the first time thanks to Don S instructions. I did everything as instructed. It appeared that every 3rd or 4th engine rotation the mark would miss the tdc. Is that normal or...
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    Plug wires and oil filter

    Hello I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 Can someone please advice original plug wire and oil filter stock number or a Sierra part number or an auto store part number that is the equivalent Thanks in advance Claudio
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    How to hook up an ACR to an inboard

    Hello, I need a little help making sure I do it correctly. I currently have a four position perko switch. Two batteries, one deep cycle and the other starting. I would like to archive the following, 1) hook up the house panel to the deep cycle battery and 2) use the starting battery only to...
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    Timing instructions

    Good morning, I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I will attempt to check my own timing this evening. Is there a bulletin on here that will help me? Also, what two wires do I need to bridge to put the engine in test mode? I've been told to set at...
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    Bogs down during take off and slow to get out of the hole

    Hello I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I recently had the timing set, changed spark plugs, rotor and distributor cap. During acceleration, I noticed she bogs down from idle thru full throttle which makes it getting out of the hole a little slow...
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    Tune up

    I have a 1998 mercuries 350 EFI MPI Engine Serial OL067176 Sterndrive OL153367 I recently had the timing checked by the mechanic and they said it was good and she was running good. I replaced distributor cap, rotor and plugs today and I will replace the wires tomorrow. The old spark plugs...
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