Mercury idle speed and temperature gauge

[KIRASIR]

1. I recent bought a boat with an 80hp 1980 Mercury motor. I haven't tried it in the water yet, but when I ran it on muffs it was idling at ~1900-2000RPM. Any idea what the idle speed should be for this motor? (It starts right away without any hesitation.)<br /><br />2. I also want to add a water temperature gauge. There is a plug at the end of the block called "block flush plug" (I think). Can I take it out and screw the temperature sensor instead?<br />(see the pictures)<br /><br /> plug and sensor <br /><br /> plug <br /><br />Thanks guys.<br /><br />Serge

 

[Rex]

Re: Mercury idle speed and temperature gauge

iF YOU WOULD THINK ABOUT SELLING IT LET ME KNOW.<br />tHANK yOU

 

[snapperbait]

Re: Mercury idle speed and temperature gauge

Idle RPM in forward gear should be approx. 700 RPM... In neutral arrorx 800 RPM... <br /><br />My Merc 60 Idles high (1500) on the first cold start for about a minute then it settles to 800-850...<br /><br />If the idle does not come down after warm up, then an adjustment is necessary... Check all the linkage and make sure the carbs are fully closing and opening in sinc...<br /><br />For the temp sensor, If the area behind the block flush plug is deep enough to accept the sender then go for it...

 

[KIRASIR]

Re: Mercury idle speed and temperature gauge

snapperbait:<br /><br />When I start it up it idles at about 1900 but I never ran it long enough to let it completely warm up. I guess I'll know in the spring. <br /><br />Thanks<br /><br />Serge