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    1976 Mercury 500 only runs for a few seconds

    Any advice is appreciated. My previously running 1976 Merc 500 will not stay running more than a few seconds at a time. If I give it some choke as it's dying, I can keep it running for a little while longer but as soon as don't choke it, it will die. I took it out to the river a few days ago and...
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    Spark Plug Picure - Diagnosis Please

    1976 Merc 500 - SN 4577xxx. This motor came with a 1959 Glasspar G-3 that I plan to restore some day but I thought I would get the motor running and put it on my 14' runabout. It has been sitting for a couple of years so here are the things that have been done to date. It was only getting spark...
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    Odd Mercury/Mariner Control Box

    I have been looking for a while to replace the deteriorating control box wiring for my 1976 Merc 500 with tilt/trim. I really didn't want to try and replace just the wiring harness (at $200.00 and trying to solder the connections) and I really never liked the separate 3 button trim/tilt switch...
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    Mercury Control Box With Trim Wiring Question

    I currently have a 1976 Mercury 500 with power trim with a period correct control box with a separate 3 button power trim switch. I just acquired a newer control box with a round 8 pin connector and power trim built in to the handle that I would like to use on this motor. Old power trim...
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    1959 Glasspar G-3 Restoration

    I'm not brand new to boats but this will be the first restoration that I have attempted. I have owned a 1965 Seaswirl p-14 runabout for several years and I have made some cosmetic repairs including paint, but nothing like the work that this G-3 needs. I Have split the deck from the hull and...
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    How to remove outboard with trim/tilt?

    I need to remove my 1976 Merc 500 with factory power trim/tilt. I would like to know if I need to remove the hoses at the trim motor or at the cylinders, and if the motor should tilted all the way up or all the way down? Will I lose any fluid and do I need to remove any fluid prior to removal...
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    '66 40hp Thermostat

    I was checking a new thermostat that I bought for my '66 Big twin by dropping it in a cup of boiling water and here is what I found. Initial temp reading with a barbeque meat thermometer in the cup of water measured at 197 degrees and was about 30 seconds after removing the cup of water from...
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    Transom Drain Advice Needed - Pics Included

    Just a few weeks ago I discovered a small stainless steel screw at the very bottom of my transom was a drain plug for the entire area underneath the deck of my 14' fiberglass runabout. After I removed the screw, I got about 30 gallons of water to drain out. I am attaching pictures of my...
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    1965 Seaswirl P-14 - foam question

    I have started a small restoration my 1965 Seaswirl 14' runabout. I was removing a few misc screws from the outside of the transom that some previous owner had installed. When I removed one of these screws from the very bottom of the transom a little water leaked out. I got a small...
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    '66 40hp severe flooding problem

    I just replaced all ignition components and installed a Sierra carb kit and now I have fuel dripping/running out of the exhaust when I try to start it. It had some pretty violent pops and tried to start a few times but there is just too much fuel. I have followed the instructions for setting...
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    Where does this wire connect? '66 40hp

    Motor is a 1966 Evinrude 40 hp electric start. I Just finished with replacing coils, condensers, points and plug wires as well as putting in a carb kit but noticed that I had this black ground wire that I don't know where it connects to. One end connects to the powerhead and it about 4"-6"...
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    Can a bad gasket cause low compression on bottom cylinder?

    My 1968 Merc 650 has the following compression on the cylinders from top to bottom, 120 , 125 , 120 , 105. Could there be extra air getting into the bottom cylinder from a bad gasket between the powerhead and exhaust plate? There does not appear to be any water in that cylinder. Thanks for...
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    1968 650 Ignition and Wiring Diagram

    I'm trying to determine the type of ignition and a wiring diagram for my '68 Merc 650. I have looked at all the diagrams on Maxrules and it seems to be a combination of the 650S breakerless with ignition driver and the 650 thunderbolt ignition. It has "lightning energizer" on what I thought...
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    Prop Identification

    Hi. I'm having a difficult time identifying the prop on my 1969 Merc 650. The only numbers on the prop are a 1 and then right underneath the 1 is 863R. Anyone have any idea on who the manufacturer might be? Thanks. Edit: After scraping off some grease on the hub, I discovered that it is a...
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    Merc 650 ignition

    I just recently purchased a 1968 Mercury 650 serial #2446837 along with a Seloc repair manual. According to the manual my motor should have a type III ignition but the switchbox in my motor is the same as in a type II as is the wiring. Is my Seloc manual wrong or is it possible that I have an...
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