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    2001 mercury 15hp four stroke dropping a cylinder

    I have a mercury 15 hp four stroke 2001 15elh4st The motor will start right up run good for about 15-30 seconds then drop the top cylinder and eventually will stall out. So far it’s got good compression, cleaned carb, and did a spark test. Any ideas guys?
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    Johnson 50 four stroke won’t run

    Hey guys! I have a 2003 Johnson Four stroke Efi engine that won’t stay running. Model j50pl4sr Here’s the story. Motor was running great and all of a sudden it dies on me. Won’t start in neutral but it will start in high idle but will run rough and die instantly once put back into regular...
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    2008 Yamaha 90 efi is dieing on me

    Hey guys, I purchased a boat with a 2008 90 hp four stroke EFI and it ran good on the boat I purchased it from. I just installed it on a new to me boat got it all hooked up and took it to the lake, fired right up, got up on plain and ran good for about 30 seconds then bogged down and shut off...
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    No spark or fuel pump

    Great news! I found a couple grounds that were discontinued near the solenoid area. Connected them to ground and connected my kill switch back up properly and I have ignition! Only other issue I see is when I hook up to water I have water coming out of the block in three locations. I can only...
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    No spark or fuel pump

    Ok guys I’m back at it today. First thing I checked is battery voltage. I have 12.36 volts before cranking and it drops down to 10.2 volts while cranking. I have the kill switch wires disconnected. Can someone tell me if the wires need to be connected for it to run or disconnected. I know on a...
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    No spark or fuel pump

    Ok on the cover it does say EFI. Digital Ignition. When I turn the key the gauges come on but no beep, no fuel pump, and no spark. This is a new to me boat bought on auction that claimed to be running. The engine and Bay Area look to be never touched as it is very clean.
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    No spark or fuel pump

    Ok I can try to get engine info for you. Where is that located? Also is the kill switch bypassed by cutting the two wires and leaving them apart or splicing them together? I do not hear any sign of a fuel pump.
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    No spark or fuel pump

    Hey guys! I purchased a 2002 deck boat off an auction site that has a 5.0 liter mercruser engine in it. They claimed it runs and drives. Motor looks very clean. My issue. Motor will turn over just fine. It doesn’t appear to be getting any other power (no fuel pump noise, no spark etc. what...
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    Honda trim unit fit on a tahatsu engine?

    Hi guys, I have a 2019 tahatsu 90 four stroke engine. It has a damaged tilt and trim unit. My question is does the Honda trim unit of the same year am size work? They look to be the same thing. Anyone with some more knowledge than me please help!
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    No power to fuel injectors

    I’m in the process of disconnecting everything, cleaning and drying out and I noticed some sand and crud coming out of alternator. Could a faulty alternator cause any of the symptoms listed above? I will disconnect it and get it checked at a local parts store
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    No power to fuel injectors

    Yes, I just purchased the smart craft so it was not on the motor when submerged. Have good spark on all plugs. The thing that stumps me is it ran for a few minutes after I got all the water out.
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    No power to fuel injectors

    Guys any advice would be much appreciated! Here are some things if tried. I was able to get my hands on a used ecu with all matching numbers, Iv also replaced the main relay with a new one that Iv had in the shop. Also tried a new battery and switched out the main power cables coming in. If...
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    No power to fuel injectors

    I am getting a couple warnings from my smart craft monitor app. I will post pictures.
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    No power to fuel injectors

    They are two wire injectors.
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    No power to fuel injectors

    Ok I will hook up a new battery, clean all of the leads/grounds. I checked the injectors themselves and each one read 16.7 ohms. I also checked the plugs coming into the injectors with a volt meter and get nothing. Is there a better method? From my understanding there should be a constant...
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    No power to fuel injectors

    Yes, electric fuel pump will run for about 15-20 seconds then a click sound over by the solenoid/relay area. Fuel pressure at the shredder valve is 48-52 psi.
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    No power to fuel injectors

    Ok guys, I picked up a boat from the auction that was said to be flooded. Boat has a 2012 mercury 90 four stroke efi serial# 1b943661. Once I got the boat home I drained the oil (had some water), pulled plugs, sprayed fogging oil in cylinders, cleaned filters, cleaned tank where fuel pumps are...
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    1987 300 hp Johnson oceanic runner not getting spark

    I recently bought a 300 hp Johnson outboard. The motor came with the throttle and shift cables and the ignition but not the control box. I had to instal a new ignition because the key was not with the old one. I believe I have everything hooked up but it is not producing any spark? The motor...
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    1999 yamaha 1200xl starter just spins.

    Hi, I have a 1999 yamaha 1200xl that won't start. When I hit the ignition the starter just spins and doesn't ingage anything. I'm thinking the starter needs to be replaced? If it in fact does need replaced, how is the best way to go about it. I have read that the exhaust needs to be removed to...
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    2002 evenrude 225 Ficht won't start after shut off.

    Hello, I have a 2002 225hp evenrude Ficht outboard on my triton boat and it starts right up first start and runs perfect with no issues until I go to shut it off then turn it back on and the no oil, hot, and check engine light comes on and won't turn over. If I take the power cables off the...
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