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    Merc 260 5.7L overheating

    Regards to all ! I have a 5.7L Merc in my boat. When the engine is running the temp gauge shows 140-150. As soon as I stop the engine, temp gauge starts rising to 190. Risers and exhaust manifolds are very hot to touch. Water pump impeller was replaced before last season (30 hours). Out of the...
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    165 Merc will not go to WOT (stays at 2700RPM)

    Good day fellows, Prop has been changed from 21 to 19 pitch Compression tested (120) Engine runs fine, but will not go past 2,700RPM. What is next? Thanks
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    Mooring equipment requirements

    Good day all. I always kept the boat at the marina dock. Now, for the first time I got an opportunity to keep her at the spot designated by the local government. They have a requirement for boaters to have minimum mooring equipment. Can someone advise what I need? There is a mooring bouy...
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    Better gas mileadge by changing propeller pitch?

    On my twin 5.7 Mercs I run 14 1/4" x 17" pitch propeller. The engine runs 4700rpm at WOT which I know is within the manual specs range. If I were to change pitch to 19 or 20 would it be better on gas? The boat is an old 26' Formuila deep-v and weights about 6500-7000 lbs. Any advise is greatly...
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    Startron fuel additive

    My boat is sitting in the water without being used much this season. The gas I have in tanks is there for 8 month. I added "Stabil" gas stabilizer 8 month ago. If I run the boat on this gas, am I at risk of getting carbs clogged? Did anyone use "Startron" - enzyme based fuel additive? If yes...
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    Could I have killed both batteries ?

    Good day all,<br />I started the engine for the first time this season and here we go again :o : Did not notice that a positive battery cable is quietly resting on the alternator... The outcome was - lots of sparking and a damaged cable. I replaced cable and started engine. Now, a week later I...
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    Leaving block fully drained for winter

    Good day all,<br />This is quick... <br />I remember reading a few posts that during winter time some people leave their block and manifolds dry without antifreeze/water mix.<br />Will this cause rust??? <br />Please share your observations and experience.<br />Thanks,
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    Overheat while winterizing

    I started winterizing this weekend. The canister I had antifreeze in did not have a hole in the went cap. The pump sucked all air out of the can and by the time I noticed this the can was already deformed with the liquid barely comming out. To make things worse I closed the valve on the...
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    350 Mercruiser I/O exhaust risers are too hot

    Past weekend I noticed exhaust risers are too hot to touch. Drop of water on the intake manifold boils and evaporates. With all these symptoms temerature gauge reads 140-150 operation temperature.<br />Anyone could comment on this?<br />Risers are 2 years old.<br /><br />Thank you !!!
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    Alpha One water intake hose

    As I was replacing lower shift cable this saturday, I notice that my water intake hose has a bend in it. When the boat was in the water, it made me wonder why one engine was running about 30 degrees warmer then the other. Might have been not enough water was getting to it. <br /><br />I got a...
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    Engine running, impeller pumping raw water, but open/close valve blocks water fl

    I am sorry for kind of posting same type of question as on this Thread <br /><br />I want to make a flush system using a couple of open/close valves. I want to run the engine while flushing with fresh water.<br /><br />Question: <br />Will it cause damage to pump impeller or anything else if I...
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    Flushing I/O used in salt water (not with Perko Flush-Pro)

    I have read many threads about this. <br />Concluded that Perko Flush Pro is not something I would want to use. "West Marine customers" feedbacks are not that great to say the least.<br />MSD "Guardian" setup is close to $500 per engine, and I have two engines. Do not want to spend that much.<br...
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    Fogging engine and using same Spark Plugs

    My 350 Merc was fogged during winterizing time.<br />In Spring, I did not change the spark plugs.<br />How bad is it? <br />Are you guys changing spark plugs after winter and then reusing same set befor winterizing again?<br />Engines start good, idle smooth. <br />What am I loosing?<br /><br...
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    Stalls when shifting in reverse, also grinding sound

    I have pre 1986 Mercruiser 350.<br />Everything was fine for a few times I took her out. This weekend I took her out and as I shifted in reverse to back out of the dock, I heard a grinding sound on the PORT side for about 2 seconds, then PORT engine stalled. I started it again and shifted a few...
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    Onboard Battery Charger opinions

    Just want to get some feedback as to which charger is best.<br />I have my eyes set on MinnKota 440 - 4 banks charger. Outputs 10 amp per bank. <br />Any comments on MinnKota??? <br /><br />I run twin engine setup with 2 batteries per engine. batteries are isolated by "1,2,both" switch.<br /><br...
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    Starter clicking... Battery discharged?

    Good day!<br /><br />When I try to start my starboard engine, the starter just does a single "click" sound. <br /><br />When I pluged in battery changer and switched positioned a switch on charger to "50A", it "clicked" again and did not turn the engine. <br /><br />I took booster cables from...
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    Spraying Awlgrip paint

    I have read a few posts about painting with Awlgrip. <br />I have past experience spraying Interlux Brightside Polyurethane on my previous boat. This time I only need to match paint for the repaired area. I tried to match Interlux to the paint on my hull. I took white and added almond to it as I...
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    Lower shift cable on Alpha 1

    Changed shift cable last week. Put the drive back on. <br />Now, I tested shifting with engine not running and here it is:<br />I get good forward and neutral, but it is not going into reverse. It gets to the point where the control gets resistance. I did not try to force it...<br />What is wrong?
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    Need help with flooring, fiberglass laying, laminating

    I have read and read many other posts about this.<br />Some things I am not sure about. Please help me out figuring this out. <br /><br />I am in the start phase of a project for my 26' Formula. <br />In my deck there is a hatch to a storage compartment. The compartment floor rests between the...
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    Lower shift cable for alpha 1

    I have changed a lower shift cable on my alpha 1.<br />There is a little a little screw that threaded inside of shift cable slide. <br />I tightened the screw, but the slide has as little as 1/32" play.<br />Is this normal? If should be fixed, what should I do?
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