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    2007 mercury 115 efi

    Hi there !As I attempted to change the water pump impeller i got very surprised,because when I removed the gear housing nearly a quart of engine oil leaked out.Should I have drained the engine oil beforehand,as obviously the driveshaft enters the oil pump.Thanks!
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    Gearhousing swap question

    Happy New Boating Year to all of you!I want to know will there be any problem moving the intestines of an 86 alpha lower unit into a 78 I believe #1 gear housing.I know that the units interchange as assemblies,but want to be sure that the older gearhousing will accept the later stuffing.Thank you!
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    lost the play in the prop shaft Alpha 1

    Hi everyone!After some welding on the top of the bullet on my lower unit I assembled it filled it with oil and tried it on muffs .It shifts and rotates fine but I noticed that the normal play for&aft the propshaft is gone .Where could`ve I gone wrong.Could it be that some leakege from the...
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    Alpha lower unit crack treatment

    Hi everyone!Let my girlfriend drive my boat and when I shouted her ~You`re too close to the shore !~It was already too late .Busted the lower unit gear housing,the gimbal ring ,the already soft transom and etc.A good friend of mine welded (sculptured) the missing bullet of the gear housing back...
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    1990 omc 3.0l Cobra

    Hi everyone!When winterizing I noticed that the gear oil was milky ,so i decided to reseal the drive.Took some time the seal kit to cross the pond to Bulgaria Europe.Did the job clean and easy but there is something that worries me-when I installed the drive back i noticed that when in gear I...
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    optimax 115 2007

    Hi everyone!I am trying to reinstall the engine oil tank of a 2007 3 cyl optimax,that someone has removed and quit.Should I disassemble the lower cowling and how ,since I removed the 4 bolts visible,but the cowling still seems to stay attached?Thank you!
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    2006 optimax 115

    Hi everyone!Need some info on 3 cyl. Optimax 115 that can`t start because of water in fuel and subsequent bad job at the local Mercury dealership.I managed to download service manual for the earlier 115 6 cyl Optimax,but I fear there may be some differences between the two engines.If anyone can...
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    Gen ! Alpha 3,7 lx

    Hi everyone!Just finnished the overhaul of my outdrive,renewed gears,bearings,seals etc.While test driving at about 3200 rpm I placed hand on the cap of the upper unit and it felt hot but still possible to bear.Took the boat out ,released the tension(took out a shim) of the upper bearing...
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    Shift cable or shift interupt switch?

    Hello everyone!Yesterday I was cruising at 3200rpm with my 20ftboat Merc 170 Alpha1 when suddenly the engine went out of gear and revved up.I shut it down,restarted again,but I couldn`t into gear any more.No forward or reverse.I couldn`t hear any atempt of the drive to engage.We were six grown...
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    garmin 300c and 400c

    I recently won a Garmin 300c fishfinder in a local tournament.They say it`s for the anglers who fish mostly freshwaters and I fish mostly salt waters .What makes the difference and will it be any good for bay fishing?Thank you!
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    2007 Optimax 115 problem

    HI!After salt water fuel contamination the VSTwas not drained for months,and now the motor refuses to start.New filter ,fresh fuel,high pressure pump engages,smart craft signals engine or fuel and engine icons while cranking.NO spark!Could water-in-fuel sensor in the VST(looks corroded) cause...
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    Outboard conversion

    Is outboard conversion possible on boats with integrated swim platform by modiffying the platform to acomodate large outboard?Has anyone seen such a thing?Thanks1
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    is that normal?

    My boat stood on a trailer for 8 months winterised.I started up the engine on muffs (Mercruiser 170 ) to check the alternator I just installed and noticed that the water that came out of the drive was dirty in the beginning .Did an oil change and when I started it again I noticed no flow.Shut...
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    93 omc 3.0 cobra

    After summerizing the boat started to overheat ,so I cleaned the riser,that was blocked and tested the thermostat.The next day I tested the boat and noticed something different from what was normal before.The engine relatively easy reached 180 degrees at full load and when idling dropped to...
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    94 Yamaha v4 140 problem

    Hi everyone,Ihave bought an Yamaha 140 with a problem.When on muffs it starts and idles fine,but when above 2000rpm it runs rough.Might be some electric problem,but since I don`t have a wiring diagram it`s hard to tell.Can somebody help me with an advice or tell me if an on-line diagram can be...
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    Summerizing issue

    Hello to all of you people of knowledge and boating itch-pain.When summerising the mid -nineties 3.0 liter OMC Cobra performed perfectly on muffs.Then in the lake (salt water)when put on load it started heating up and when the temperature reached 180 I switched it off and paddled to the...
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    Merc 4.3 problem

    I have a problem with the engine of my boat that is a Mercruiser 4.3 with an EFI the serial # is OM 341529.When I reach over 2000 rpm the engine starts to run erraticly and after a while it stalls.When not in gear it reaches over 4400,but then again it stalls .On the other hand it idles...
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    hissing noise

    I am still new to the current engine that I have,so the question that I`ll ask may appear stupid,but anyhow...When I start my Merc 170 I notice that some warm air is coming out of an opening at the rear top portside of the engine.When I shut the engine down that air with an audible hissing sound...
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    power steering pump

    Hello everyone!My power steering pump is leaking because of cracked reservoir and lost fittings in the back.Can I just remove it ,block the hoses and drive like that till I find a spare one?My engine is a Merc 170.Thank you!
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    Stering fluid leak

    I have a steering fluid leak coming from the lower back end of the steering reservoir\pump.It`s not the two hose connections .It seems to come from a recessed hole in that area.Can somebody point me out where to look in order to repair it?No one likes oily messy engines.Thank you!
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