performance issue

[tautog_33]

I just got home and unbolted airbox I pushed shifter handle all the way forward the butterflies on all carbs open about 1/4-1/2" only I then manually moved the linkage and they open all the way. McGillicuddy and Blue_heron you guys were right about the carbs butterflies. So I must of did something to the linkage when I slid the cables around under the console. Now I need to find a way to adjust this. I really appreciate everyones help it's nice to have guys who enjoy helping out a fellow seacraft owner. I will work on adjusting the cable and keep everyone posted after the next sea trial. Thanks again Tautog!

[tautog_33]

Hi Big i sent u a PM. Thanks.

[Blue_Heron]

Originally Posted by tautog_33

So I must of did something to the linkage when I slid the cables around under the console.

That don't sound right. If something came loose, or the cable broke inside the sheath, maybe... But if that's the case, you should be able to verify it with a simple test.

The throttle cable inside the motor attaches to the throttle control lever. It is the lower of two levers with a common pivot point. The upper lever controls timing advance. If you can move the throttle control lever without moving the remote control, something is broke or something came loose at the other end. Try it both ways; see if you can move the throttle control lever on the motor without moving the remote control, then try holding the throttle control lever while your six year old moves the remote control. If there's any slop, the problem is probably in the cable or in the remote control. This should be done with the engine off. Especially the part with the six year old.

If there isn't any slop, it may be that the set screw on the throttle cam roller loosened up when you were running WOT in 2'-3' chop. There is a linkage from the throttle control arm to the throttle cam. The throttle cam has a tic mark on it. The cam roller on the bottom carb's linkage is supposed to engage the cam at the tic mark. If it doesn't engage at the tic mark, loosen the set screw a little more, adjust the roller so it hits the cam at the tic mark, and tighten the set screw.

Of course this is all wild speculation on my part since I haven't even seen the motor. You do need the factory service manual, or more pics and guidance from Tim (Bigshrimpin). He's the resident Merc guru. I just made a lucky guess, so I'm sticking my neck out.
Dave

[McGillicuddy]

WTG, Glad you found a logical explanation. Blue Heron is right on - Bigshrimpin is a motor-geek. Notice the logic he presented in his assessment. Catches a lot of fish, too

The fuel issue didn't seem right because you had mentioned all the fuel work done so recently.

The throttle cable could have been stretched (maybe in moving) and thus toast, or possibly a connection or screw came loose as Blue Heron noted. Nice to have a little helper around to move the throttle for you. Good luck and let us know what you find. See you back at 5200 rpm in no time. PS manual on ebay out of NM for 19.95 or make offer ...

[tautog_33]

Hi McGillicuddy is the manual your'e referring to the one published by Clymer

[tautog_33]

Sorry about the last post i know now which one to look for Thanks.

[Fr. Frank]

something as simple as a bind in the cable can limit cable movement

[tautog_33]

Hi everyone had some free time today to investigate my controls. I found that the linkage was binding up on the plastic mounting block on the console. I was able to shave some of it down no more friction there. I also checked cables on the motor end, found that i have one inch of play on the bottom cable and half inch on the top cable. I was able to adjust it enough to get my carbs to open fully, but i cannot get them to open up full in reverse. I ran motor on muffs the idle is right where it should be and it shifts fine both directions. I will sea trial tomorrow to see if this works. I will keep posting my results. Thanks again guys!

[workinpr0gress]

Originally Posted by tautog_33

I also checked cables on the motor end, found that i have one inch of play on the bottom cable and half inch on the top cable. I was able to adjust it enough to get my carbs to open fully

Wowwwwwww. That's a ton, is the plastic cable end or adjusting collar or collar mount wallowed out? You need cables.

[tautog_33]

I didn't see any other worn areas. The linkage on the console end dug a groove into the plastic mounting block and the console too. All this tension must of stretched out the cable. The carbs were definitely being restricted. I do plan on getting new cables.