do two cycles idle rough???

[mcarlito]

Hello and I have a 1966 60hp Johnson. Just got it running and it feels real good to have completed all the work. Do two cycle outboards always idle rough?? AND I want to know how to adjust the idle on this engine . I have looked at the linkage and noticed on the carb there is an adjustment I can make to adjust the butterfly inside the carb. This arm coming from the carb has a tefflon wheel that rides on the external linkage cam. Am I looking in the right spot??<br />Again a big thanks<br />Mike and son Zach still digging it!!!

 

[Chinewalker]

Re: do two cycles idle rough???

Hi MHB,<br /> Actually, your V4 should idle quite smoothly. If it's idling rough it could be related to carb adjustment, or it could be a timing issue. I am assuming that after all your magneto adventures that you got the timing belt back to where it's supposed to be?<br /> I doubt it is related to your linkage. More than likely you just need to adjust the idle jets on the carb. I can't remember for sure, but I think you've got a couple of knobs on top of the carb that may help adjust that...<br /><br />- Scott

 

[mcarlito]

Re: do two cycles idle rough???

Thanks Chinewalker, <br />I did place the timing belt back to where it was supposed to be. But how do you fine tune the timing. I have manuals but they suggest equipment that I don't have. Yes I have two knobs on the carbs for adjustments and I will work with those as well. I believe you seat them, then back out 1-1/4 turns. Sounds right??<br />Thank you<br />Mike and son Zach

 

[fireman57]

Re: do two cycles idle rough???

Around 1-1/4 to 1-1/2 to start. Don't go more than an eightof a turn at a time and give the engine 5 or 10 seconds to respond. When it starts to flood out turn it back about 1/4 turn. Then slowly open it until you find your best spot. It will idle higher on muffs then if submerged. I seem to remember that it will be about 250-300 rpms higher on muffs. Joe Reeves has a great thread on setting the carbs. Do a search for it. If it still runs rough make sure that you don't have an air leak somewhere.

 

[mcarlito]

Re: do two cycles idle rough???

Thanks fireman57,<br />How do I set the timing?? and the idle speed??<br />thank you

 

[mcarlito]

Re: do two cycles idle rough???

Thanks again for the input, How do I set the timing and the idle speed??<br /><br />Thanks again<br />Mike

 

[fireman57]

Re: do two cycles idle rough???

On your low speed knob use the above method. For your timing look in your manual under link and sync or do a search at the top of the page. Like I said check out Joe Reeves thread on carb settings. It is excellent.

 

[mcarlito]

Re: do two cycles idle rough???

Thanks fireman57 I'll do my homework and get back to this posting.<br /><br />thanks again<br />Mike and son Zach

 

[mcarlito]

Re: do two cycles idle rough???

Well, I took the time to read the manual and found the link to Joe Reeves on tuning a carb. I reveiwed my work and link and syn settings looked good. I spent time with the setting the jets on the carb and it's now running very smooth. <br />One last question, where do I set the idle speed??<br />Thanks to all for you input<br />Mike and son Zach ready to launch.

 

[fireman57]

Re: do two cycles idle rough???

Set your idle while you are on the water. The backpressure of the water makes a lot of difference. fire it up and make sure you run it until it is warm. Maybe five or ten minutes of cruising. Back it down and use your low speed knob if it has one and turn it 1/4 turn at a time until you get the idle that you want. I always do this while I'm in gear so I don't get it so low that it dies when I put it in gear. When you take it out of gear it should not increase rpms substantially. Just find a nice smooth idle that you can live with. If memory serves, which it doesn't always, it should be around 6 to 750 rpms. If you have a tach it helps.

 

[mcarlito]

Re: do two cycles idle rough???

Thanks fireman57,<br />I don't think this engine has a low speed knob. Are you referring to an adjustment on the Throttle control by the helm?? <br />Mike

 

[fireman57]

Re: do two cycles idle rough???

You can try to use that if you want but that justs adjusts your throttle cable to give it a little more gas. When you "set the jets on the carb" one of them should be your low speed (idle) adjustment. I'm glad that you and Zack stuck with it.

 

[mcarlito]

Re: do two cycles idle rough???

Thanks fireman57 we're glad as well. It looks like this weekend will be launch number 2. I think it's been a learning experience for both my son and I. Now he said to me that he wants to build a tubine jet engine!!! I told him to do some research first cause I think you're in over your head. He got on the computer and found a number of links to people who have successfuly built them. Guess what I'll be doing for the next couple of years?? and you know it will worth every minute of it.<br />thanks again<br />Mike and son Zach (9th grade)

 

[mcarlito]

Re: do two cycles idle rough???

So my son and I finally got the boat in the water this past Wednesday. The start up was just great, pulled out into the water and waited until we were out past the 5mph zone, then I gradually moved the throddle forward and every step of the way the engine kept saying, let's go for it. We got it to plane and it was just the greatest. We throddled down and up a few times and I noticed that at a point where the stern was at its highest point (right before it planed), the motor wanted to spudder and it sounded like it was running rough, but as soon as it started to plane, the motor just began screaming. It's a great feeling. Is it best to throddle up slowly or to throddle up fast to get the boat to plane??<br />Thanks to all. and I'm still working on the idling jets, it still rough.<br />Mike and son Zach

 

[Solittle]

Re: do two cycles idle rough???

Your motor is working the hardest as you climb the step to get on a plane. I like to get on a plane quickly & then throttle back to wherever I want to cruise at.