88' yamaha 1.7L 130hp outboard rough idle problem

[gdpalumbo]

hello, and thank you for taking the chance to view this post, if you can help me I would really appreciate it. Ok, so the motor runs great and pushes the boat very fast, but I think the low jet needs adjustment and here's why. When the motor is at idle it seems like it is a little rough and sometimes it will stall either just sitting or when I go to put it in gear. The rpm's are at 500 when it is at idle. When I give it throttle you can feel it get out of the low jet and start to use the high jet (main jet) and it cleans up and sounds beautiful and smooth. I don't know if it is supposed to run like that at idle or not, but If I could adjust it so I never have to worry about it stalling when I put it in gear or when it is just sitting there at idle it would be great. Please let me know if you have a solution to this problem, thanks alot!!!

 

[New2me]

Re: 88' yamaha 1.7L 130hp outboard rough idle problem

The motor is still using the low speed circut when you give it a Little throttle,I belive the motor uses the low speed circut a little past idle then the high speed circut starts taking over,The RPMs need to be around 700 to 800 in gear,You may need to do a link & sync,But it sound like the usual trash in the carb.IF you decide to do a carb clean you might want to consider changing all the fuel hoses in the motor as the ethnol like to tear them up.MY 2 Cents

 

[gdpalumbo]

Re: 88' yamaha 1.7L 130hp outboard rough idle problem

thank you for your reply, but could you explain what you mean by a link and sync? Thanks