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    Ready to give up on this 650

    I have had this 69 650 4 cylinder on a 14 foot glass runabout for about two years now, and have yet to get it to run well enough to plane in less than 30 seconds, if at all. I use it at 3700 feet elevation, it has a 15 inch pitch prop, and it starts and idles well. Boat and motor combination...
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    Could I have soaked foam?

    I have a 69 Merc 650 on a 14.5' fibreglass runabout of likely the same age. I have been trying to figure out why it takes forever or never to get the boat to plane and it has been suggested that maybe the foam is soaked. I scaled it today on the trailer, which I estimate is no more that 250-300...
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    69 650 "Dropping 1 or 2 cylinders under load"

    I've been trying to get this motor to run well for a couple years. Took it to a small motors mechanic who is more familiar with 25 hp and under, but he said he'd give it a try. Everything checked out fine on muffs, so he came with me in the water to try to "fine tune". With just me in boat, it...
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    Direct Charge or "Plain Vanilla" crossfire?

    I'm planning to have a mechanic friend do the "Link n Synch" procedure that I found in this forum, on my '69 Merc 650 ser.#2717403, and I need to know for sure, for obvious reasons, if it is a Direct Charge or Plain Vanilla crossfire. Can anyone help me out? Thanks in advance.
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    Telltale on 1977 6hp?

    A neighbour gave me a 6hp Evinrude (1977 by the serial #) and I got it running, but there was no water coming out what I assume was the p-hole at the end of a tube attached to cylinder and exiting at rear bottom engine cover. Is there a thermostat that may not have reached opening temp. after...
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    Correct Pitch for 69 Merc 650

    I'm starting to think about getting my old boat and motor ready for the ice breakup in a couple months. Last outing last year, I finally got the old girl to run reasonably well after getting carbs rebuilt and finally playing around with the mixtures long enough to get it to both idle as well as...
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    69 650 4cyl too lean to idle or too rich for wot

    I have been trying to get my engine to run properly and was told by a dealer mechanic to set idle by slowly turning in till falters and then back out 1/2 turn. When I do this it will idle fine but won't rev past about 1/4 speed or so even in neutral. If I crank them in, I can get it to run at...
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    Thermostat Replacement

    Can anyone tell me how big a job it is to replace the thermostat in a 69 Merc 650 4 cyl? Engine does not warm up even to touch until running under load for several minutes and I'm pretty sure this affects performance. I re and re'd the carbs myself and though it wasn't fun, I got it done. How...
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    Need help with wiring switchbox-69 650 4 cyl.

    I had the carbs rebuilt and when putting everything back together discovered that not all the labels I had put on the wires were intact. Can anyone tell me which wires go where? Serial # is 2717403. I have no spark. Based on other posts here, I think I have them right except maybe for a white...
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    Help With Switchbox Wiring 650 4 cyl.

    So I had the carbs rebuilt and got everything back together but a couple of the labels on the wires to the switchbox had gone missing. I put them back where I thought they went but won't even fire. All I have access to is an on-line Clymer "all purpose" manual which is not much help. Can anyone...
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    Carb removal 69 650 4cyl

    So I'm going to pull the carbs on my 69 650 and take them in for rebuild. It looks to me like the front plate, distributor, and coil will probably have to come off first. Anything else? Any pitfalls I need to be aware of? I've tried to find a manufacturers shop manual for my engine but have so...
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    69 merc 650 needs carbs rebuilt?

    I posted last year about my problem with my 65 hp 4 cyl. not being able to get my 14 ' fibreglass runabout out of the water without long delay and sometimes not at all at our cabin at 3700 ' elevation. I tried repropping with a 15" instead of 17". Made little difference. I had a mechanic check...
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    Shop Manual

    I am planning to try to get my 69 merc 650 4 cyl running properly before the upcoming season and I understand the 1st step is getting a genuine merc shop/service manual for my model. Where do I find such a thing? I've seen aftermarket ones advertised as well as what looks like genuine ones which...
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    Prop Install Question

    I just replaced the prop on my 69 merc 65 hp on the weekend, and after reading some other posts, I'm wondering if I screwed up. I ordered the prop through iboats, a Solas that was advertised as ready to bolt on. I even talked to a rep and was told the same. After reading some other posts, I'm...
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    Altitude Issues

    I am new to boating and have recently become the proud owner of a 1969 merc 65hp 4 cyl mounted on a 14 ft fibreglass runabout of probably the same vintage. The motor seemed to run reasonably well out of water on muffs when I purchased it at sea level. I took it up to our cabin at 3600 ft and it...
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