Idle for Sportjet 90hp

[tmontano]

Hi, I'm new this this site.I just bought a 94 Sea Rayder with a Sport Jet 90 hp motor.The boat and motor are in perfect condion , it runs perfect in every way. I am the second owner, I don't think they used it much . The only thing is that it idles a little fast , is there an idel adjustment on the carbs. is the idle mix screw the same thing.

Thank, Tony

 

[MercFan]

Re: Idle for Sportjet 90hp

One of the experts will chime in soon to give you the correct location of the idle speed adjustment. But to answer your question, no, idle mix and idle speed adjustment are seperate.

 

[Frank Acampora]

Re: Idle for Sportjet 90hp

Don't mess with the screws on the carbs!

If it is like the outboard, behind the carbs on the starboard side will be the linkage tower that connects and synchronizes the triggers under the flywheel with the carbs. Somewhere near the middle to bottom you will see a cast piece with a screw that bears against the block at idle. Loosen the locknut and adjust the screw out (counterclockwise) about 1/8 turn at a time. A little goes a long way so don't get ham handed. After each adjustment, throttle up the engine then go back into neutral to see if it is where you want it (it will change slightly). Finally, re-tighten the locknut.

Ahhhhh--Mercfan--down there below the equator is starboard still the right side? LOL.

 

[MercFan]

Re: Idle for Sportjet 90hp

Hehehehe! Yes, and I don't know why they just don't call it the right hand side. It's not like it changes! ;-P

But a note on the mixture screws. You guys have techs that actually know what they're doing. If tmontano was in my neck of the woods I'd have him turn each idle mixture screw back in, counting the turns as he went, and atleast confirm that each screw is screwed out by the same amount of turns. On my motor the mixture screws across 3 carbs differed from 1 turn to 2 and half turns. The most important thing is to mark exactly where the screw is now so you can return to that setting.

Edit:
PS, sorry for invading you guys' board. Though I'm a Merc owner a woman emailed me a week or so ago. Single mom, with brothers and dad far away. She bought herself a boat with a Chrysler 105 that doesn't run. So I'm just trolling this section as well, trying to prepare myself for what's to come. Getting a motor going with a female on the other end 200 miles away. She'll be sending me pictures and a serial number soon so we can take it from there. There are a couple a technical minded guys there that are willing to help her, but they have no idea what to do. So I just wanna go over the basics with her. Most difficult part, if it's like my Merc, being the link & sync.

PPS, not that I think women are incapable of working on an outboard. She's willing and loves the challange. I just hope I don't leave something basic out that I thought she'd know and she fries the motor :-/

 

[Frank Acampora]

Re: Idle for Sportjet 90hp

You are not invading. We like Merc fans. They are SOOO easy to pick on.
At any rate, the 105 is almost dirt simple--depending on ignition system. If it has air spark and fuel, it's gunna run. --No magic to it. Start a new thread on it when you get specifics.

Just heard a politically incorrect woman joke: Why could Helen Keller not drive? --She was a woman! Ok girls, don't beat me up. Would not be married 37 years if I really thought that way.