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    1996 70 hp shift linkage issue for a remote set-up

    I have been out a couple of times now and have been having issues with my engine not fully ingauging into reverse. As I move the shifter lever and sounds like it is starting to shift just continues to make the sort of grinding sound. I remove the engine cover to find the lever is not being...
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    Prop size for Tyee & Yamaha

    I have an aluminum Lund Tyee 16.5', boat is listed at 910 lbs with a '98 70hp yamaha. What would the best prop pitch be for top end for my boat and recomended RPM? Thanks
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    470 water pump/impeller question

    I have been fighting an overheating issue on my (1977) 3.7. I have the 4" heat exchanger and have now replaced the water pump impeller twice with no signs of damage or wear. The lower housing has been replaced and all water passages have been checked and no blockage. I reassembled the lower...
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    470 cooling question.

    What has been dones: upgrade frome 3" to 4" heat exchanger, last year new exhaust flappers (should not affect cooling) removed and cleaned riser - no restrictions new new rubber boot when replacing flappers new water pump impeller kit with new housing removed and inspected upper housing and no...
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    1974 15 hp Johnson performance issue

    I have been working on my dad's older 15hp Johnson and I have replaced the Thermostat & gasket. The motor starts and idles fine but once you put it in forward gear and run up to WOT after a bit it seems to bog down and then when you try to increase speed it seems to only run on one cyclinder. I...
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    1974 Johnson 15 hp thermostat question

    Can I bypass the thermostat on my outboard by replacing it with a washer with the same inside hole diameter as what the thermostat openning would be? How would the engine be affected? smaller hp johnson just have a small hose which shows water flow without a thermostat, is there a certain hp...
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    Lund Pro V SE with 150 Merc Opti

    My father has his 1900 Lund Pro V SE with a 150 Merc Opti on it with a 15 hp 4 stroke merc kicker. The problem is that he had some medical issues and the boat now has two year old gas in it about 30 gals. What is the easiest way to remove the gas from both the boat and motors. I figure I...
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    Merc 470 water temp question

    I have an old 470 which I replaced the water pump and lower housing in early summer last year, I have also upgraded to a 4" heat exchanger. When I run the boat on muffs the water temp verys from 170 to 185, drops when throtle is increase but slowley climes when in just idle. Is this a...
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    Fuel Issue for a 1978 merc 470

    This is not really a tread about my 470 but my fuel supply line no longer supplies fuel to the fuel pump. the pick-up hose either disconnected or became brittle and broke. I can pressurize my fuel tank and air will leave through both the vent and fuel supply line. My tank is in the floor...
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    Merc 470 cam water leak repair kit

    The water pump reseal/repair kit you can buy on ebay, does it have everything needed except the speedy sleaves and are they of good quality? Below is how it is listed on ebay. 3-7L-Water-Pump-Timing-Cover-Reseal-Kit-Mercruiser-3-7-liter-165-170-190-470-488 Thanks.
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    Merc 470, 4" heat exchanger end cap corrosion

    I have upgraded my heat exchanger to a 4" on my 470. After the first outing the temp was perfect and once I got home I took off the end caps and found a white crusty build up on both end caps on the inside. It looks like the end caps are aluminum and have the same manufacturing name on them as...
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    470 cam seals and speedy sleeves

    I have just updated my 470 to a 4" heat exchanger and now my weep hole is showing signs of bad cam seals. What are the part numbers for the two seals and the speedy sleeves, I have searched the forums but find everything but the part numbers. Thanks
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    MinnKota Power Drive 55 with Ipilot add-on issues

    This past weekend I was out using my trolling motor and it started acting up. It is a Power Drive 55 with the add-on Ipilot. What it would do is: Work great for 20 to 30 minutes while using the autopilot advanced setting along with cruise control, then it would loose teh satalite signal and...
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    470 Heat exchanger end cap bases

    How are the threaded bases, which the end caps screw into, on a 470 headt exchanger attached. The part I have questions about are on each end the the heat exchanger with the end caps removed. Are they brased on with a torch or is there some type of sealant holding them in? Thanks
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    Tilt/Trim pump issues

    I own a '78 Glastron with a 470. It has a single selenoid trim pump with the three button set-up. I have just recently replaced both tilt/trim senders as the wires were corroaded and shot. The tilt/trim was working great until we ran back to the dock to re-supply and head back out but the...
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    Tilt Trim sensor & limit sender wires

    I am replacing my tilt/trim sender on my 78 Glastron. My only question is where does the second wire from the trim position sensor (driver side of the boat) go to? The wires on mine were very brittle and one was broke, the other went to a terminal on the trim motor selenoid. I could not fine...
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    1978 Glastron SSV 175 with 470

    My boat has the 470 with the alternator update, the P/O had plumbed in two 3" heat exchangers but one would leak around the end caps. I did a total rebuild of the lower unit water pump and changed the heat exchanger back to a single. It runs about 160 on the muffs, so that should be good. I...
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    MC1 R lower unit water pump replacement

    I will be replacing my water pump in the lower unit, the serial number is 4789139. Can anyone tell my what parts I will need to do the job properly, thanks.
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    Possible 470 exhaust leak, yes I know what they say about them, run away.

    I have a 1977 Glastron SSV 175 with a Merc 470, I got it out of storage and just before I reinstall the heat exchanger end caps I fired her up and I could see exhaust smoke coming out of the uncapped heat exchanger. Does that mean I have an exhaust leak, bad gasket or a crack somewhere? My oil...
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    Trying to teach an old dog new tricks.........

    First a little history.. My father has always had a 14' Lund (red & silver) with a 15 hp Johson and loved to take his father along with myself and brother fishing. As we got older, moved away and his father passing, he bought a 1999 Lund Pro V 1900 with a Merc Optimax 150 with all the bells...
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