Recent content by gvarney13

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    1984 150 Mariner serial # ?

    I have a 1984 150 Mariner and I can't seen to find the serial # on the powerhead. I have it on the outdrive 6520375 but I can not find the plate on the top. Here are the #'s I have found A156832 and 8588346. Does anyone knkow if one of these is it? Thanks in advance
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    Is this too much Prop for this Boat?

    I have an 1984 150 Mariner, with a 8" Jack Plate, with a 25 pitch SS Prop on a 17.5' bass boat. Is this too much?
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    1984 150 Mariner V6 Idle Issues

    Good evening, I am in need of some guidance. I just purchased a new bass boat(new to me). It has a 1984 150 Mariner V-6. It starts up great, but when idling it jumps from anywhere around 800 rpm's to 1100 rpm's. I just ordered a book on it. Where should I start fixing these issues? Thanks in...
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    Oil and Filter

    Good morning, Does anyone know what other oil filters I can use besides Merc? Also what is the best oil to run, is synthetic OK?
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    Shift Issue

    Good evening again, I have another issue. I am having a problem shifting from forward to neutral. I have to put it in reverse, then put it in neutral and I am also having some resistance on the shifter. Sometimes I can wiggle the shifter and it will hit neutral. Any ideas
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    Backfire Issue

    Good Evening, I was out on the lake this weekend and a few times that I killed the engine, it back fired. First time this has happened. Carb been rebuilt recently. Any ideas?
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    Problems shifting in Neutral

    I was out on the lake this morning and I was having issues shifting from forward or reverse to neutral. I would have to wiggle the control to get it in neutral. Anyone have any ideas
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    Power issues 1987 3.0

    Good evening, I went out on the lake this weekend and I could not acheive more than 3500 rpms. In the last few months I have done a full tune up, changed to electronic ignition, and rebuilt carb. Any help is much appreciated.
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    Outdrive Gear oil from Shift Shaft

    Good Evening, I just noticed gear oil dripping from the shift shaft . Does anyone know what I can do?
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    Water Seperator

    Good evening Is it nessesary to have a Water Seperator on a 1987 GM 3.0? As of right now I dont have one but i am thinking of adding it. Thanks in advance
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    New Ignition Coil and Conversion

    Hello All I have just recently changed my 1987 Gm 4 cyl 3.0 from conventional ignition to electronic. I also changed out the coil but I need to disconnect the resistor if in fact it has one. Any ideas what to disconnect? Thanks Guy
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    Carb Rebuild Kit

    Does anyone know what the Part # is for a carb rebuild kit for a Mercarb part #1389-9562? My carb does not have the bent accelerator pump assemby. All the Sierra kits show to have the bent accel pump assembly. Thanks 1987 GM Inline 4 3.0L
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    Need help! Raw Water Pump Issue

    :mad:Good afternoon, I have a 1987 GM Inline 4 cyl 3.0L with a Alpha 1 Drive. I replaced the water pump, back flushed the system as Bondo stated and I am still not getting any reasonable flow out of the small vent hole at the bottom of the unit and I only have water flowing out the Port side...
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    1987 Mercruiser 3.0 water pump

    Hello all, I am new to to these forums. This seems to be the place to get all the answers. I have an 1987 GM Inline 4 cyl 3.0 and I just changed out the lower unit water pump. The impeller was shot. Well now I only have water coming out of the starboard side of the unit and there is barely...
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    1987 Mercruiser

    Hello all. I have an 1987 3.0 and I just changed out the lower unit water pump. The impeller was shot. Well know I only have water coming out of the right side of the unit and there is barely water coming out of the small hole on the bottom of the unit. Any suggestions
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