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    ‘91 merc 60hp overheating alarm buzzing

    So it just occurred to me that when I changed the impeller I did more of a quick job and just replaced the impeller and left the current impeller plate gaskets on because I was really just trying to trouble shoot the issue. Pumps water great but if one of the seals is leaking could this lead to...
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    ‘91 merc 60hp overheating alarm buzzing

    So it just occurred to me that I messed up and put that these numbers were after running when in fact they were before running dry cylinder. After running it my numbers were 127 top 131 middle 131 bottom. Seems fine to me.
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    ‘91 merc 60hp overheating alarm buzzing

    So I had a feeling my compression tester wasn’t reading correctly. Bought a new test and tested today (after running for 5 mins) Top- 126 Middle- 130 Bottom-125
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    1991 mercury 60hp clutch problems?

    Ya I was definitely planning to get one and measure the temperatures of each cylinder while letting it idle on the muffs with a hose. Water is definitely cold from hose this time of year so I wouldn’t be surprised if thermostat is even opening even if the block feels hot. Thank you will update...
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    1991 mercury 60hp clutch problems?

    Got it thanks. Well I replaced my therostat and rebuilt poppet valve. After idling on muffs for a while the head seems to get hot. I a, only able to hold a finger on it for a second before it gets to hot. The water comin from the tell is cold?
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    1991 mercury 60hp clutch problems?

    Ah I see I thought it acted like the older style clutch dogs. Also quick question when installing thermostat on these motors does it have to be positioned a certain way when installing I forgot to check mine when I removed it.
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    1991 mercury 60hp clutch problems?

    Yes just confirming that I was reading it correctly thank you
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    ‘91 merc 60hp overheating alarm buzzing

    it’s not looking like it has one just connected to block no head or am I wrong ?
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    ‘91 merc 60hp overheating alarm buzzing

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    1991 mercury 60hp clutch problems?

    So it’s supposed to ratchet when turned clockwise? it locks fine when turned counter clockwise.
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    1991 mercury 60hp clutch problems?

    So today I drained and refilled my lower unit while waiting for parts for another project. Noticed some amounts of metal shavings, not major like shards just more like tiny flakes and only a few. I then tested to see if my clutch was fully engaging. I put the motor in forward full throttle and...
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    ‘91 merc 60hp overheating alarm buzzing

    Did my model have no head gasket?
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    ‘91 merc 60hp overheating alarm buzzing

    Thank you this is very useful
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    ‘91 merc 60hp overheating alarm buzzing

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    ‘91 merc 60hp overheating alarm buzzing

    Thank you for the information on how the poppet system works. I compression tested each cylinder at about 110 on each cylinder so that’s good. Now I’m having an issue with the alarm just giving a constant beep at all times. Even after the motor sat cold for days, as soon as I turn the key the...
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    ‘91 merc 60hp overheating alarm buzzing

    Will be testing tomorrow. Does the poppet valve still allow water to flow through the engine at high speeds even if the thermostat is stuck shut?
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    ‘91 merc 60hp overheating alarm buzzing

    So to update. I replaced impeller and got a new t stat. I tested the t stat to see if it was opening properly and found that it was not opening at all. I never had the alarm go off at high speeds only at idle speed and it continued to pump water. I’ve had it out a few times before replacing the...
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    ‘91 merc 60hp overheating alarm buzzing

    I’m going to replace the impeller and thermostat and start there. Problem is I’ve had this boat out a few times so how can I also check for damage besides a compression test?
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    1991 60-HP wont trim down

    Yeah I noticed that when looking for parts
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    ‘91 merc 60hp overheating alarm buzzing

    Hi everyone so I have a ‘91 merc 60hp 2 stroke (elpto) and I have been running into an issue with the over heat buzzer going off. So at first the basics, alarm only goes off when at idle speed in gear (going through a no wake zone) the tell tale is pumping water well, the block does not get very...
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