115 evinrude ficht throttle butterflies

[noelm]

I have a pair of 2000 115 Fichts and on both motors the port butterlies have started constantly jammed in the closed position, the starboard pair have never jammed, to fix I need to disconnect the linkage that joins the two and spray with WD or the like and work back and forth, now seeing as this has happened to both motors at about the same time it seems like there is a problem with this, has anyone ever heard of this? by the way the motors have done a lot of hours but there seems to be no wear in the shafts or throttle bodies.

 

[seahorse5]

Re: 115 evinrude ficht throttle butterflies

Because of the vertical throttle shafts, if any saltwater spray gets under the hood inside the engine, it could corrode the shafts and make the throttles stiff.<br /><br />You can disconnect the linkage and attempt to free them up with a penentrating oil. If that does not work, then replace the thottle bodies.

 

[noelm]

Re: 115 evinrude ficht throttle butterflies

that could be true, but, why only the port set on both motors and not startboard? also why only after 5 years?? may be complete dismantle and grease with some sort of OMC grease?

 

[marinemech]

Re: 115 evinrude ficht throttle butterflies

i haven't heard of a corrosion problem but one thing i've seen is the air box mounted to tight causing the linkage to jam<br />just a thought

 

[noelm]

Re: 115 evinrude ficht throttle butterflies

airbox not the problem as it is jammed when airbox removed, I think I will just strip down throttle body on one motor and pull out butterflies and shaft to make sure there is no corrosion and grease it with proper marine grease and see if it sticks again, it only sticks if not used for a couple of weeks, so, it must be seizing from lack of lubrication though I doubt if it would ever have been lubricated on such a part from new.

 

[rodbolt]

Re: 115 evinrude ficht throttle butterflies

noelm<br /> the shafts are not designed to be removed. I advise against it. it usually leads to broken screws. the screws are installed then peened over so to prevent them from coming out. if you attempt it, grind the end of the screw off first. use new screws on reassembly and peen them back over or you will see what a tiny screw can do to a piston/port. a regular 30 day spraying of the shafts with fliud film or a like corrosion inhibitor will prevent that, I think the service manual says a bit about spraying the power heads and the salt water intravel. no one ever does but it is usually there<br />most twin engines installations tend to be stern heavy, most people just chop the throttle and go from planing speeds to idle in one motion and the wave washes over the engines. then salt mist <br />enters through the hood air intakes. also some are mounted to low and the spray forcing upwards will enter the cowls drains. most the time excessive water under the hood is operator error or rigging error, but some hulls will swamp the motor, no matter what you try ,when slowing down. try removing the throttle body assy and soaking them in chlorox bleach for a bit. remove all rubber or plastic parts first.

 

[noelm]

Re: 115 evinrude ficht throttle butterflies

Hey rodbolt, thanks for that info, I guess when removed I would have seen that the screws are not removable,and I have seen what a small screw can do to pistons and cylinders, I will try a frequent spray and if that fails will purchase a new throttle body assy as the motors have been exceptionaly good but for this small fault, they are worth a few dollars to keep in top condition, I knew I would get some good info from this site

 

[rodbolt]

Re: 115 evinrude ficht throttle butterflies

noelm<br /> usually people realize the screw is not ment to be removed just after breaking them off. I have drilled a few out but its not cheap nor fun. my drilling price is a bit higher than standard billing price I was refering to the screws holding the butterflies to the shafts. try removing the body assy and soking in penetrateing oil or chlorox. chlorox will eat the salt and aluminium oxide but is hard on plastic and rubber.

 

[noelm]

Re: 115 evinrude ficht throttle butterflies

yep guessed that what you meant, I have seen butterfly screws peened before so I would have checked before using brute force, will give them a soak as well to see how it goes, before I take off throttle body, I assume there is a gasket or rubber seal of some sort? I will get a new one before taking it apart, again thanks for the info

 

[Basscat 1]

Re: 115 evinrude ficht throttle butterflies

I have had them drilled out and replaced by a buddy of mine who has experience in a machine shop. We used an industrial grade loctite upon reasembly. No big deal.