Carb Replacement Questions

[stonyloam]

Not an expert, but I suspect that you have some crud in the needle and seat that is keeping the float from shutting the gas off when the bowl is full. Get yourself a carb rebuild kit and a gallon of carb cleaner (comes with parts basket) and take it apart and clean it. Follow the step by step instructions in the Merc manual and you should fine. Not that hard to do.

 

[nola mike]

Yeah, your inlet looks clean because all that crap is in your carb. Try rebuilding it yourself. It may or may not work, but you're no worse off if it doesn't. The merc manual really walks you through it.

 

[robinsbd]

Ok guys, I'm finally tackling the carb rebuild. I ordered a kit and should be arriving soon. I'm actually looking forward to it as I think I will enjoy it.

I just had a little concern the other day when I was running the engine and watching the carb. It seemed like my engine was hotter than normal. The temp gauge was reading just under 170, which seems normal, but man everything seemed hot. Even the cooling hoses seemed hotter than normal. Top of the risers were hot as well. I could put my hand on them, but not comfortable. Could this be because I was running the engine around 2K RPM for a while observing the carb? What really struck me as odd was how the cooling intake hose was so hot. Maybe this is totally normal, but I wanted to check with you guys.

 

[nola mike]

Were you running it on muffs? If yes, than 2K for an extended period could be more than the muffs can handle...

 

[robinsbd]

No, not on muffs. My boat is in the water.

 

[NHGuy]

2000 rpm out of gear creates very little heat in the engine. The cooling water pump runs same speed as the motor so it supplies water to the thermostat housing. The thermostat will hold back the water, it only allows enough water to keep the engine up to temp. Unneeded cooling water passes by the engine and cools the exhaust on it's way out. When there's no load the engine spins along making very little heat. The thermostat only allows enough cooling water to maintain it's prescribed temperature.
It's hard to tell temperatures with your hands. On a hot sunny day my engine feels hot too. When it's cold and crummy out it feels toasty.
If you need to verify, get yourself a laser temp gun. You can shoot it all over the engine to know what's hot and what's not. It's a very valuable tool and well worth the $30 or $40 they cost. I use mine around the house, boat, cars...everything that needs temps taken.

 

[Bondo]

The temp gauge was reading just under 170, which seems normal, but man everything seemed hot.

Ayuh,..... I Dare ya to put yer hand into a bucket of 170? water,......

170?,..... IS Hot,.... to the touch anyways,....

 

[robinsbd]

So true. You have a point there.