60 hp 1971 rough idle

[lastout]

ok, for those that may have followed my recent post, i found the problem with the studdering at top end speed, it was sucking a small amount of air around the fuel lines that feed each carburetor. but now i can't seem to get the engine to run at idle speed worth a darn. top end and low speed are fine. and in neutral the motor idles fine. but when i try to idle in forward, it runs rough and then will eventually die. the carbs are clean and i have been adjusting the low speed needles, but i just can't seem to make it work. any hints or is this something i'm just going to have to live with on this engine (60 hp 1971, 3 cylinder looper)? thanks guys.

 

[The Marine Doctor]

Re: 60 hp 1971 rough idle

When you are turning the needles...do they turn really easy..or do they seem tight?<br /><br />Are you adjusting them separately or with the sync rod?<br /><br />TMD

 

[lastout]

Re: 60 hp 1971 rough idle

they are tight TMD, i put in new d-seals when i cleaned the carbs. the rod is no longer on this engine so i am adjusting each carb seperately. now, my manual says to back the needles out 5/8 of a turn and then make minor adjustments from there. i am going to today try the 1 1/2 turn method that is often posted on here and see what happens. i will post later, but in the meantime if you guys have ANY ideas, i am open for ANY suggestions. thanks again for any replies.

 

[The Marine Doctor]

Re: 60 hp 1971 rough idle

The reference turn are for an engine will little or no wear. As the engine gets older..you will find that you have to adjust the carbs accordingly.<br /><br />TMD

 

[lastout]

Re: 60 hp 1971 rough idle

thanks TMD, i took to boat to the water this morning, readjusted the ss needles using the 1 1/2 turn method and now i'm idling fine. its a little rough running at slow speed but still alot better than it was. thank you guys so much for your insight. now i have another question that i must post. i will post it seperatly though so i don't miss any posts, but it seems i have milk in my carbs. check out my new post and thanks again for all your help.