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Evinrudej reacted to Chris1956's post in the thread ‘91 merc 60hp overheating alarm buzzing with Like.

Generally speaking, compression testers are often inaccurate. However, they are usually reliable. If all the cylinders read the same...

Wednesday at 11:53 AM
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Evinrudej replied to the thread ‘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-...

Tuesday at 5:58 PM
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Evinrudej replied to the thread 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...

Dec 25, 2025
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Evinrudej replied to the thread 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...

Dec 25, 2025
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Evinrudej replied to the thread 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...

Dec 24, 2025
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Evinrudej reacted to Texasmark's post in the thread 1991 mercury 60hp clutch problems? with Like.

That's the "overrun clutch" functioning. The rear of F gear is configured in a saw tooth configuration where R is vertical sided slots...

Dec 24, 2025
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Evinrudej reacted to Nordin's post in the thread 1991 mercury 60hp clutch problems? with Like.

Exactly as racerone and jimmbo says, the clutch dog has ramps at one side of the dog. Just normal situation.

Dec 23, 2025
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Evinrudej replied to the thread 1991 mercury 60hp clutch problems?.

Yes just confirming that I was reading it correctly thank you

Dec 23, 2025
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Evinrudej replied to the thread ‘91 merc 60hp overheating alarm buzzing.

it’s not looking like it has one just connected to block no head or am I wrong ?

Dec 22, 2025
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Evinrudej replied to the thread ‘91 merc 60hp overheating alarm buzzing.
Dec 22, 2025
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Evinrudej reacted to jimmbo's post in the thread 1991 mercury 60hp clutch problems? with Like.

Yes. The Forward Gear-Clutch Dog have Ramps that will slide in One Direction, but don't in the Other.

Dec 21, 2025
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Evinrudej reacted to racerone's post in the thread 1991 mercury 60hp clutch problems? with Like.

???-----Very normal and exactly the way it left the factory.----In forward the prop ratchets when turned clockwise.----It locks when...

Dec 21, 2025
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Evinrudej replied to the thread 1991 mercury 60hp clutch problems?.

So it’s supposed to ratchet when turned clockwise? it locks fine when turned counter clockwise.

Dec 21, 2025
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Evinrudej posted the thread 1991 mercury 60hp clutch problems? in Mercury & Mariner Outboards.

So today I drained and refilled my lower unit while waiting for parts for another project. Noticed some amounts of metal shavings, not...

Dec 21, 2025
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Evinrudej replied to the thread ‘91 merc 60hp overheating alarm buzzing.

Did my model have no head gasket?

Dec 21, 2025

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