please help, gear problems????

[Shameless]

gear problems???

I just picked up another toy, a 1985 16 foot Checkmate with a 1985 Evinrude 115 on the back. Motor is set deep for the previous owner skiing and at the moment has a 17 pitch aluminum prop on it. Had it out on the water yesterday, coming back in at the end of the day and after only ruuning this thing for about 1/2 an hour since I bought it, it seems the lower let go on me. I was running 4800 rpms and all of a sudden the rpm's took off and boat came off of plane. I did not over rev the motor, so that is not a concern. At first, felt like I lost the prop, so I raised the motor and prop was still there. So with prop visible, I refired motor, put in gear and the prop did not spin.

So, is this my sign to repower?? What are your thoughts. I have been away from outboards for awhile and owne stern drive boats, so I am out of tune with this little Johnny-rude...

[Hottrucks]

I would find out for sure before I did anything it could be a cable adjustment broken drive shaft or stripped??? check the gear oil on it and see if it's full of water a lower is cheap compaired to repowering it???

[afr]

yep check it out real good first
let me know i can get you a replacement

[Shameless]

Linkage under the cowl appears to be ok, gear lube clean (new), no water or metal shavings in it, prop shaft outside gear case good.

[2.5_stoker]

spun hub?

[BadHabit 21]

Did you still have water coming out the pisser ??

[Shameless]

spun hub?


The hub does look like it is spun, but with the motor running on a hose, I put it in gear and the prop shaft still does not spin in forward or reverse.

[Shameless]

Did you still have water coming out the pisser ??


Yes, it is still pissing.

[2.5_stoker]

The hub does look like it is spun, but with the motor running on a hose, I put it in gear and the prop shaft still does not spin in forward or reverse.

hmmm...if its not something simple then i wont be much help...i was just taking a stab in the dark with the spun hub guess...good luck getting it resolved

[BadHabit 21]

Sounds like it might be a pinion

[Superbender]

i'm thinkin snaped drive shaft :nonod:I have one if you need it,with the motor NOT running turn the prop and have someone shift it see if you can feel it.

[Shameless]

i'm thinkin snaped drive shaft :nonod:I have one if you need it,with the motor NOT running turn the prop and have someone shift it see if you can feel it.

Thanks, i will try that Monday.

[Shameless]

hmmm...if its not something simple then i wont be much help...i was just taking a stab in the dark with the spun hub guess...good luck getting it resolved


I pulled the prop and saw the condition of the hub and thought I might get out of this easy until I fired it up and shifted it.

Thanks for the input!!:cheers:

[afr]

nee to go ahead and pull the foot off and look and the splines on the crank and the splines on the shaft

[Shameless]

nee to go ahead and pull the foot off and look and the splines on the crank and the splines on the shaft



It has been years since I have done that on an O/B. Can you refresh my memory please. Don't I need to put it in gear and for some reason I thought there was a pin or something I had to mess with on the upper part of the mid.

[benski]

Probably time to break down and get a manual for the darn thing. You might save $35.00 in time and grief alone! Just my $.02..

[Shameless]

Probably time to break down and get a manual for the darn thing. You might save $35.00 in time and grief alone! Just my $.02..



True, I have only had this thing for a week and I have about 45 minutes of running time with it. According the the dealer it came from, I should nothave had to worry about anything this quickly.

[benski]

I feel your pain. Hope you get it resolved soon!

[flabum1017]

disconnect the shift cable at the motor and try shifting it by hand.

[Shameless]

disconnect the shift cable at the motor and try shifting it by hand.



OK, thanks.

[Fast Fred]

think you will find a two part drive shaft set up in that unit, the second part bein inside the case, think she has let go right thare. cuzz, drive shaft is spinin cuzz she is still peein, gear oil was clean so nuthin burned inside.:cool:
she is shiftin but the power ain't gettin thare.

think thare is at least one on the shelf reddy to go:cool:

[Shameless]

think you will find a two part drive shaft set up in that unit, the second part bein inside the case, think she has let go right thare. cuzz, drive shaft is spinin cuzz she is still peein, gear oil was clean so nuthin burned inside.:cool:
she is shiftin but the power ain't gettin thare.

think thare is at least one on the shelf reddy to go:cool:


Thanks. I will by a manuel this week to help refresh mymemory on yanking the case off. Will yank the case off by the weekend and will let ya know if I need a shaft!!

Thanks for the input!!:)

[Fast Fred]

under the zink, get them bolts, shifter unbolts under the hood:cool:

[donmac]

take a look under the front of the block while shifting to be sure the shift shaft is moving with the linkage. if it is still pumping water the top end of the drive shaft is o.k. . if the shiftshaft is moving with the linkage and the hub is good you need to get the casing off. take the pin out off the shiftshaft under the carbs,remove trimtab and all bolts. 4 bolts on the side one inside trimtab. don't worry about forward and reverse but it will have to be in a position you can access the shiftshaft pin.

[Shameless]

Thanks, I could not remember about being in gear or not and it was the shift shaft pin that was not coming to mind. I guess I need to refresh my older o/b knowlege.

[Pro300x24LD]

Hi shameless

[flabum1017]

I have had the aluminum shift block (the part the screw attaches the shift rod under the carbs) break and cause the same problem.

[Shameless]

Hi shameless


Hey ROK!!!!!!

[Shameless]

Well, it was the dive shaft, broke just below the water pump housing. So, I have not picked a a manual yet...anyone care to give me a hint on how to get the shaft out of the gear case...

[flabum1017]

Well, it was the dive shaft, broke just below the water pump housing. So, I have not picked a a manual yet...anyone care to give me a hint on how to get the shaft out of the gear case...


If the driveshaft is original, it will be a one peice shaft, if it was replaced, it could be a two piece shaft.

If it is a one piece shaft, you will have to pull the prop carrier, get a wrench on the prop nut (the OMC wrench is reccommended), pull the upper driveshaft bearing carrier and try to loosen the pinion nut using a pair of vise grips on the broken shaft. If that does not work, then you will have to get a socket welded to the broken end of the driveshaft and use a breaker bar on it.

If it is a 2 piece shaft, take the upper driveshaft bearing carrier out, smack the broke driveshaft with a hammer with a single, good blow then use a pair of vise grips to pull the broken piece out.

[Shameless]

If the driveshaft is original, it will be a one peice shaft, if it was replaced, it could be a two piece shaft.

If it is a one piece shaft, you will have to pull the prop carrier, get a wrench on the prop nut (the OMC wrench is reccommended), pull the upper driveshaft bearing carrier and try to loosen the pinion nut using a pair of vise grips on the broken shaft. If that does not work, then you will have to get a socket welded to the broken end of the driveshaft and use a breaker bar on it.

If it is a 2 piece shaft, take the upper driveshaft bearing carrier out, smack the broke driveshaft with a hammer with a single, good blow then use a pair of vise grips to pull the broken piece out.

Thanks, it is a 1 piece shaft.