@#**!!! Sheared off bolts - now what.

[Britcheflee]

Just been one of those days. I have a 6hp Evinrude Fisherman 1968 rescued from barn.
It runs but after running it for about 10 mins or so on pond it seemed to be running extremely hot. This was used in seawater previously. I am thinking the impeller/water pump is not working - so, got it back on the workstand and started to take it apart to get to impeller and check. I am removing the 4 bolts which hold on the bottom part of the 'leg' two came off without a problem....the two on the other side I thought were moving but no, managed to shear them off.

I have a couple of questions:

1. Is the first part where the bolt goes in threaded? I am hoping that even if sheared off I can remove the bottom part...I gave it a good few thumps with a rubber mallet but it is not budging. If I can get that bottom part off maybe I can get the remainder of the bolt with some grippers and get it out?

2. If not, now what do I do? Looks like a tight spot to try to drill them out. very frustrating. However, I can imagine this is not unheard of...so one of you clever folk can give me some good advice?

Thanks,


Lee

 

[bernd64]

Re: @#**!!! Sheared off bolts - now what.

turn the motor over so the L/U and the bolds lock up take some P B blaster and spray it in the bold holes let it sit over night see if it get lose this way if not you need some heat from a torch to get it lose

 

[dwco5051]

Re: @#**!!! Sheared off bolts - now what.

If the heads of the bolts sheared it should slide down off the bolts and you can attempt to remove them with a pair of vise grips later with pb blaster, heat, prayers to Neptune, and all the other things necessary when working on a saltwater motor. Used in saltwater and having been stored in a barn for a few years could also mean the drive shaft is corroded and stuck in the crank. I believe this motor has an upper and lower shift rod. Did you disconnect the coupling first?

Good luck.

 

[Britcheflee]

Re: @#**!!! Sheared off bolts - now what.

No - I just removed the 4 bolts at the bottom - would much appreciate advice re shift rod and coupling disconnect.

Lee

 

[Oldyellow71]

Re: @#**!!! Sheared off bolts - now what.

I am not a lower unit expert by any means. Once these guys help you get that figured out I would also take a look at your thermostat and inside the housing. I had a 9 horse rude that was used in salt water as a trolling mtr. She was running hot even with a new impeller kit. I pulled the thermostat housing and the t-stat and housing was all corroded and had crazy white deposits blocking the flow. I replaced the t-stat and bead blasted the inside of the housing, then she ran l(and cooled)like a champ. If you are getting water to the top but the t-stat isnt opening its not doing you any good. Now as far as the stuck bolts I do that for a living. If you can turn the motor upside down and soak in wintergreen or deep creep over night. If the shank is out of the hole get some SHARP vice grips (I go through a pair every two weeks) on them and try to get them out. If that doesnt work, get some sharp drill bits and try easy outs.

 

[tx1961whaler]

Re: @#**!!! Sheared off bolts - now what.

No - I just removed the 4 bolts at the bottom - would much appreciate advice re shift rod and coupling disconnect.

The lower end will drop about 1/2" and you can see the shift coupler. Remove the bolt. There is a pin in the top of the driveshaft that needs to be aligned with a slot in order for it to come out. Rotate the flywheel until the driveshaft comes out.
Do not use EZ Outs. Heat and penetrating oil are your friends here, not hardened steel stuff that will break off and cause you real problems. If you can't get vise grips on them, then drill them out. Left hand twist, real cobalt bits are perfect for this, as sometimes they catch and spin the bolt out.

 

[Britcheflee]

Re: @#**!!! Sheared off bolts - now what.

Thanks, the lower end is not moving but I think this is because the shafts of the bolts are corrodeed into the housing - I am assuming they are not threaded through there but slide through and are threaded into the upper part of the unit - this poor thing has quite a bit of salt water corrosion - already had to replace the throttle control shaft in the handle which had corroded through and other parts have that white stuff on it - can only imagine what it is like inside.
Thanks for your advice.

Lee

 

[baitmaster]

Re: @#**!!! Sheared off bolts - now what.

Whaler had my suggestion. Have taken sheared off bolts out with reverse twist drill bits. Started small size and worked up. Then the ez out after some NutsOff or pen oil. I have had some bolts just back themselves out with the drill bit running in reverse while drilling. Just try to stay in the center of the bolt with the first bit.

 

[boobie]

Re: @#**!!! Sheared off bolts - now what.

Try mixing ATF and Acetone 50/50 and squirt that on them and leave it soak. Heat will help also.

 

[BonairII]

Re: @#**!!! Sheared off bolts - now what.

I once sheared off a bolt flush(on a dirtbike). I ended up using a dremel to cut a line in the sheared end and used a flathead screwdriver to back it out. Worked like a charm!

 

[Britcheflee]

Re: @#**!!! Sheared off bolts - now what.

There is very little room to get a drill in there unfortunately - hopefully oil, heat and a few thumps with a rubber mallet might move it - dread to think what is inside there.

 

[glengold]

Re: @#**!!! Sheared off bolts - now what.

There is very little room to get a drill in there unfortunately - hopefully oil, heat and a few thumps with a rubber mallet might move it - dread to think what is inside there.

that being said you should take a look. I'm not sure about your motor but I have heard that a good flow through the water indicator doesn't mean it is flowing well through the block. If you are having overheat issues I would get an infared thermometer and look for hot spots. 20 bucks will save you a lot in the long run, and you can focus your attention to the actual areas that are overheating. DON"T RUN THE MOTOR BEFORE YOU CHECK FOR HOT SPOTS!!!!

 

[BonairII]

Re: @#**!!! Sheared off bolts - now what.

How do you check for hotspots without running the engine? Can he blow compressed air thru the coolant passages to make sure they aren't clogged or isn't that possible?

 

[glengold]

Re: @#**!!! Sheared off bolts - now what.

well obviously he needs to run it to check for hot spots, just not run it all over the lake as if there is nothing wrong. run it on the hose for a minute or less if its getting hot. if you can't keep your hand on the block for a few seconds its too hot. if you drip water on the block and it evaporates its too hot. if you aim the infared thermometer at the block and it reads 200 degrees its too hot, turn it off. you probably have 10 salt shakers worth of crud up through the passages, pull the head and inspect. an infared thermometer can show you where the hot spots are. obviously the motor must get hot before you can find them. geez!

 

[baitmaster]

Re: @#**!!! Sheared off bolts - now what.

If I can get to the head of an old rusty corroded bolt I give it a few raps with a heavy hammer before I wrench on it. If its where i can soak it with a rustbuster spray, it gets that the day before. Don't forget the anti sieze for the next time. There are a couple dif kinds. One for holding a bolt that will prob never have to come out again, and one for maybe. I have never used the permanent one and never had a bolt work loose until I needed it to come out. Spark plugs and header bolts like this stuff, and you will too.

 

[Rick.]

Re: @#**!!! Sheared off bolts - now what.

http://forums.iboats.com/showthread.php?t=494666
This might help you confidence. Best of luck. Rick.