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    Yamaha 15hp four stroke

    Good evening, It is an 2005 and I have had it about a year. It has always ran rough at idle. It was cutting off at idle until it was rebuilt the first time. It continued to idle rough but wouldn't die. Had a shop rebuild it again and now a new carb. Still idles rough but great other than that...
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    1999 Mercury 150

    I have a 150 that was originally an EFI. I was continuously having issues with and the computer ended up going out. I bought a 2000 200hp carbed engine and put the carbs on mine. I ran it with the rear bleed lines plugged off at the cylinder and it ran fine that night to test it. The next day i...
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    1999 150 efi

    I haven't been able to find anyour information step by step guide on removal of injectors. Any ideas?
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    1999 150 EFI rough idle

    I have had a rough idle since I bought it a month ago or so. I have replaced fuel lines, bulb, filters, VST filter, rebuilt the manual fuel pump, adjusted the idle timing to 8 degrees. What else could it be? I wanted to get the injectors cleaned but couldn't figure out how to remove them and the...
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    1999 150 efi

    I have this engine on a new to me boat. Ever since I bought the boat it has idled rough but fine after 1200 rpms. About a week ago it cut off in the river and there was no fuel in the bulb. Pump it up and ran no problem since. It cut off today and no fuel in bulb. About to have a thunderstorm...
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    Alpha one outdrive

    I took u-joint section out of the housing today to change the carrier seal. The bearings in side the upper outdrive section, are they lubed with the outdrive fluid or do you put grease in them like a wheel bearing?
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    Another oil question

    I am running a 4.3 out of a truck 10066011 block number. Do I run the 5w30 It calls for or 25w40?
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    Fresh Water Flush

    If I installed a "T" with a valve for a water hose, in the raw water line coming in from the transom to the engine, would you still be able to run the engine without burning up the impeller in the LU?
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    1991 4.3 flywheel

    Ok so I have found a 99 4.3 long block for my boat. My engine was originally a 1991. Will I still be able to use my flywheel as far as balancing goes? And harmonic balancer.
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    4.3 Mercruiser

    I have been having a ticking noise coming from the rear of the engine. Yesterday I was out cruising about 3800-4100 RPMs and all of a sudden it cut off and came off plane. I tried to restart it afterwards as it turns over, it clunks on every revolution of the engine. It wouldn't start up after...
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    4.3 ticking sound

    I recently bought a boat and installed a rebuilt 4.3 in it. Since I have had it on the water, there is a ticking sound coming from rear of the engine area. I have pulled the outdrive off and ran the engine and noise is still there. The noise hasn't got worse or anything it's just annoying...
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    1991 Mercruiser 4.3

    I just recently bought a boat that the engine was froze up in it. I pulled the engine and it was completely seized and full of rust. Now I have a new engine and I'm putting the accessories back on. I went to clean the manifolds and risers and notice when there laying on their side and I run...
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