How do rams bolt into the motor.. (OMC)

[Franki]

Hi all, <br /><br />I have a 100ESL72 Johnson 100HP V4<br />I am trying to get my rams out to get them rebuilt.. and I have got the bottoms out.. (had to cut the metal and drill out the holes) but the tops have me beat,, they are stainless steel bolts, but they don't really have bolt heads, just 2mm thick head with only 2 flat sides.. what I need to know is are these threaded in or are the just held in by the nuts, I ask because I have the nuts off, and they are stuck fast, I figured I'd ask before I applied more force.. (going to try pressing them out..)<br /><br />any tips would be fantastic, I have to do this now since I have cut the bolts out at the bottom.<br /><br /><br />rgds<br /><br />Frank

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

I just tried hooking a hydrolic jack to force onen of the stainless bolts out.. I put most of 600 or so kilograms against it and it didn't budge.. so I am thinking that these bolts are threaded somehow?<br /><br />does anyone have a schematic of the rams and how they attach to the leg and transom bracket?<br /><br /><br />rgds<br /><br />Frank

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

Wow, don't all rush to answer.. <br /><br />Guess noone has taken the tilt and trim rams off their legs on an omc before?<br /><br />as an update, I used a 4 foot steel pipe and a spanner to try to turn one of the stainless bolts holding the top one of the rams, and even though must have been putting an massive amount of force on it, it didn't budge, if anything, I would have snapped the end of if I pushed it any harder.. so I am stuck unable to get the rams out..<br /><br />someone must have a suggestion for me?<br /><br /><br />rgds<br /><br />Frank

 

[ICEMAN]

Re: How do rams bolt into the motor.. (OMC)

Before you really start pulling your hair out. You should see how much it's going to cost to repair or replace the rams. Can you get them anymore? Anyway, The top bolts if I remember correctly, are held in by the nuts, they are not threaded into the hole they go thru. If you really want to get them out, Here's a way to do it, when I worked on one about 20 years ago. Take a drill and drill the head off the bolt(The part with the two flats)Then get the press set up to push the bolt in. Heat the area around the bolt,(not the bolt itself.) nice and hot. Push the bolt in about 3/4 of an inch. Cut the end of the bolt off, thats in the middle there. Heat and push and cut until the bolt comes out. Then do the same for the other side. You could try drilling the bolt, but that's a stainless bolt. Are the rams locked in place or are they just tight?

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

Thanks Mr Iceman, <br /><br />much apreciated..<br /><br />I knew about the nuts, took them off the first time I tried it,, thought it might be threaded as well..<br /><br />Guess its time to get out the propane torch..<br /><br />As for the cost of the rams getting rebuilt.. my brother in law works at a massive engineering firm that builds rams from scratch for mining and other uses.. they have all the equipment needed to make any parts it needs from scratch.. and this brother in law owes me favours.. so it aint costing me a thing.. <br /><br />I don't understand why the tolerances on these bolts were made so small.. and why some of them are made of ordinary steel.. this is an outboard, OMC should have known better...<br /><br />oh well. I'll let you know how I go..<br /><br />So far I have not gotten any of the bolts off whichout damaging/destroying them.. its most annoying.. but once I get this right, I'll pull them out once or twice a year and grease them up.. so I never have to go through this again..<br /><br /><br />Thanks again for your reply and insight..<br /><br /><br />rgds<br /><br />Frank

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

Hi Mr ICEMAN and all..<br /><br />I had an idea I am about to try, let me know if you had any thoughts..<br /><br />The two bolts that hold the rams in at the top have the shanks facing each other exactly and about 2.5 inchs apart..<br /><br />I have gotten 2 small bolts and a nut.. <br />Stick one bolt in each end of the nut, (tack weilding one bolt to the nut so it can't spin... and slide the works into the gap between the two ram bolts.. <br /><br />I should then be able to wind the nut around which will force the two bolts apart and hopefully out.. if I get it far enough, I can use a slide hammer or similiar to get the bolts out the rest of the way..<br /><br />does that sound like a feasable idea or am I wasting my time?<br /><br /><br />rgds<br /><br />Frank

 

[ICEMAN]

Re: How do rams bolt into the motor.. (OMC)

Sounds like a possibility, however will it actually push both bolts out. I think it would push the looser bolt, but not both. You mentioned you tried a jack in there and it didn't work. Will your two bolt tool be strong enough or will the threads strip. either way, it's not necessarily the way you do it, as long as the outcome is what you want.

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

I used the jack on the tilt lock plate bolts.. (different to the ram bolts) (the bolts I am trying to get out now also go througth the lock plates. hense my reason to try the jack in the first place <br /><br />If one bolt comes out.. I will jam a lump of steel in its place and tighten my makeshift bolt against that.. <br /><br />I'll let you know how I go..<br /><br />rgds<br /><br />Frank

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

I got them!!!!!!!!!!!!!!!!!<br /><br /><br />Heres how..<br /><br />I did drill the head off one of the bolts..<br /><br />then I got a big long bolt slightly smaller in diameter then the stainless ones..<br /><br />and I bashed the headless bolt all the way through... till it hit the other one..<br /><br />then I bashed harder,, (you have no idea how hard I had to hit this thing.) and slowly it pushed the other one out as well.. so I only need one replacment bolt now..<br /><br />One question I do have though.. one of the rams doesn't seem to have any hole for the hydrolic fluid to connect to, it looks like its just a shock absorber or something..<br /><br />Would a 100HP motor not have a trim and only have trim???<br /><br /><br />rgds<br /><br />Frank

 

[ICEMAN]

Re: How do rams bolt into the motor.. (OMC)

HI again. Yau mentioned that one does not have the hole for the hydraulic hose, Does this motor have an electric tilt? If it does, then it only had tilt and the other cylinder was a shock absorber or an assist cylinder.

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

Yup, I believe you are correct,, it only had tilt.. that is very annoying.. I always wanted a motor with trim and tilt..<br /><br />so now I guess I should start looking for a wrecking outboard with both tilt and trim and knick the whole works..<br /><br />I am curious, does anyone know if the bigger Johnsons of the early 70's ever came with tilt AND trim? <br /><br />Will the rams and pumps from a newer model work on this outboard???<br /><br />many thanks.,<br /><br />rgds<br /><br />frank

 

[crab bait]

Re: How do rams bolt into the motor.. (OMC)

franki, i've been followin' this story & i got to ask: what made these bolts so tuff to remove ?? corrosion, damage ( bent from the jump),, what ??

 

[Franki]

Re: How do rams bolt into the motor.. (OMC)

Hi Mr Crab Bait, ,<br /><br />All I can say is "age" I have no idea why they were so bad, none of the bolts holding the leg on were hard at all.<br /><br />I suspect its just a case of the ram bolts never having been taken off before.. since it was built 30 odd years ago.<br /><br />most of the bolts where stainless, so its not rust.. they had just locked together.<br /><br /><br />rgds<br /><br />Frank