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  1. #26
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by mark1961 View Post
    Personally not a fan of those clamps.....they seem to break very easily, a pain when you trying diagnose fuel related problems.....each to their own though.
    OMC (BRP) recommends using the ratcheting clamps as replacements to the 'zip' type strap clamps. They are more dependable on these smaller hoses, and are easier to install and don't need to be ridiculously tight to be effective. Besides, at $0.25 each, more or less, it's cheep enough to have a few extra on hand....

  2. #27
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Well, I haven't accomplished much on the 'ole Johnson since the last post, until just the last few days. My hose clamps arrived shortly after New Years, but I didn't get the hoses all installed right away. I did get fuel line from the local Auto Parts store, and got all the runners cut to length. 3/16" for the carbs, and 5/16" in and out of the pump. I have settled on not hooking up the VRO, as much as I would like to. I have read several articles on the correct maintenance of the system, and though I am a believer, I just can't take the chance. This is a 25+ year old machine, and I'm not going to risk my rebuild on it. That being said, all the fuel lines are all hooked up, and ready for fuel.

    CSC_0106.jpg CSC_0109.jpg CSC_0107.jpg

    I have installed the air box base, but have not yet put the cover on. I got a Factory service manual from *-bay, and would like to review my work compared to what the "other" manual says; if I need to, I will back track to make sure everything is as it should be.

  3. #28
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Over the week-end I got the "brilliant" idea to drain the lower unit, since I was pretty much at a stand-still and figured it was as good a time to get it done as any. Well, I gotta tell you, it wasn't one of my finer moments. No, I didn't spill anything, but the smell, oh, the smell! I don't know if it was just because it was old or what, (and I smelled my share of gear oil) but it pretty much filled the whole house with it's fine odor!! SWMBO was not happy with me at all; it took the rest of the day to air the house out. I have been warned within an inch of my life!! On a brighter note, however, the gear oil looked perfect!! A little dark, but no sign of water what so ever!

    DSC_0137.jpg

    DSC_0138.JPG
    The oil looks milky, but that's only because of the white background.

    The plug has a small magnet on it, and there was barely any residue on it at all. I was very pleased to say the least. Hopefully I won't forget to fill it before I try to start it or use it... I am keeping a punch-card list now, as I am nearing the end. Really sucks to be this close and have to wait 3 months or more before I can fire it up. Oh well, there is still more to do.....

  4. #29
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Well, today I got the rest of the parts that I had been waiting for. This evening I installed the timer base and stator. I put the flywheel on, and checked TDC as instructed in the manual. I made a piston stop tool by punching out an old spark plug and putting a 1/4" carriage bolt through it and locking it with a nut. It worked perfectly.

    DSC_0156.jpg
    It was only off by about 4°, so I adjusted the timing indicator as instructed. I also got the carbs sync'ed as much as I can without starting it. I don't think I'm quite dumb enough to try that trick in the house!!

    DSC_0155.jpg DSC_0152.jpg

    I'm thinking that this is almost "it" for now, but if anything else happens, I'll be sure to post. I appreciate any input, especially if anyone sees anything that I have over looked.

    Thought I would also add a picture of a few visitors I had on the front lawn this afternoon. We still don't have much snow, so they can go pretty much where ever they want. I love seeing them; seems they can get very accustomed to us.....

    DSC_0143.JPG

    ~ more later ~

  5. #30
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    .....
    Last edited by maineboat; January 17th, 2012 at 08:07 PM. Reason: post in worng place

  6. #31
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by maineboat View Post
    OK, I haven't posted in a while, but I have been "puttering" on the motor. Since the last post, I have miked the crank, and it was within specs. I also assembled the pistons & rings, and installed them in the block. I got the block back last Wednesday, and have been so busy with that and other things, that I haven't had a chance to sit down and type a note.
    Wanted to interject an editorial here that I forgot to mention at this point in the rebuild. I have always read about heating bearings to install them, and have tried on a couple of occasions with some limited success. Well, I thought I would give another try on the lower crankshaft bearing, since I don't think it would be a good idea to pound it on, no matter how carefully or gingerly I did it. What I did was to throw the crankshaft in the freezer for about an hour, and the bearing in the oven, set at about 175° for an hour. When I set the bearing on the crank, it slipped on with no resistance at all. I think that's the best I've ever seen that trick work!!

  7. #32
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by maineboat View Post
    I got a Factory service manual from *-bay, and would like to review my work compared to what the "other" manual says; if I need to, I will back track to make sure everything is as it should be.
    Factory Manual arrived today, and from what I have read so far, everything is good to go. I don't see any inconsistencies between the two. I will say, however, that the Factory Manual is definitely more informative and is more specific. Certainly worth the $20 I sprung for it....

    ~ more later ~

  8. #33
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by maineboat View Post
    Then I got to looking on the internet, and found this place that has ratchet type hose clamps for a very reasonable cost.
    http://www.aircraftspruce.com/catalo...erbieclips.php
    For less than a ‘tenner,’ I got all the clamps I need for all the interior hoses!! Now to wait for the Mail Man…….~ more later ~
    Marineboat: just wondering if you were happy with the quality of the clamps? I'm going to order some if the are of good quality.

    Thanks!!!

  9. #34
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by NoEcm View Post
    Marineboat: just wondering if you were happy with the quality of the clamps? I'm going to order some if the are of good quality.

    Thanks!!!
    Hey NoEcm, yes, I am very happy with the clamps. They are good quality, easy to install, clamp tight and inexpensive. AircraftSpruce didn't charge much for shipping either. The only difference might be on the smaller hoses. I replaced mine with after market hose, so the outside diameter may differ. The web site is pretty good with specifications, however.

  10. #35
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Thanks for the input. I've gone ahead and ordered ~50 assorted clamps just to keep them on hand.

    My local Ace Hardware wants ~$2.00 each for these clamps and the average price that I paid to aircraftspruce was ~40 cents each including shipping.

  11. #36
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Borrowed a compression tester this week end; 135psi top, 135psi middle and 134psi bottom. I'm very pleased, and gotta remember to write this in my service manual for future reference.

    Not much left to do now but wait for spring....except to refill the lower unit.

    ~ more later ~

  12. #37
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Well, I don't know about the rest of the country, but up here in Maine, Winter is breaking, and Spring is here!! Last week I moved the motor out doors; my lower driveway gets very muddy; not just mud, but soupy mud. The kind that goes 2/3 the way up you knee. So to advoid having to 'test fire' the motor in mud instead of a makeshift tank, I decided it best to get her out in the frost. All went well and she spent a few days on my small 4-wheeler trailer.

    DSC_0341.jpg DSC_0342.jpg DSC_0345.jpg DSC_0348.jpg

  13. #38
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Sunday afternoon, at his own suggestion, my son brought the boat over, and we set the motor on. I have not sealed up the transom or bolts, but I will before I splash her. He has a nice rig that worked excellent; I don't think it took us five minutes from the time we picked her up, till she was sitting on the transom. I am going to connect all the electrics (power, battery, pt&t, cables) and steering so I can test fire her later this week. If all goes well (and I have no reason to expect otherwise) then I will seal up the transom, and work on the other "customizing" items. Test results to follow; I will post pictures and maybe even a video!!

    DSC_0356a.JPG DSC_0358aa.jpg DSC_0359.jpg DSC_0360.jpg

    Pretty 'smart' looking rig, if I do say so myself!!

  14. #39
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by maineboat View Post
    Not much left to do now but wait for spring....except to refill the lower unit.
    Don't remember the exact date, but sometime last month I refilled the lower unit. Took exactly 22oz like the service manual says!!

  15. #40
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    I tend to agree with you . afterall, to remove .001 of an inch you'd probably have to rub on metal for about 5 minutes. think about it , tiny micro particles being picked up between the tiny micro gaps of 1000 grit paper . it all adds up to almost nothing . great post.

  16. #41
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    worked with my gimbal bearing . put it in the freezer for 6 hours and it slid right on like butter .

  17. #42
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    I tend to agree with you . afterall, to remove .001 of an inch you'd probably have to rub on metal for about 5 minutes. think about it , tiny micro particles being picked up between the tiny micro gaps of 1000 grit paper . it all adds up to almost nothing . great post.

  18. #43
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    So Friday evening my son comes over and we were talking about starting the motor on Saturday morning, but I wasn't sure I would have time due to all I needed to get done before an afternoon appointment. So he says, "why not now?"

    So...we hurried and got a couple of things done that needed to be done before it could be started, and here is the result. I should have been 'with it' enough to realize that after a couple of cranks, I should have pumped the fuel line primer bulb, but it started nonetheless, on the seventh crank, on one cylinder, and all three kicked in on the eighth.



    The garden hose I had in the water bucket kicked out, and was spraying a fine mist in the air. I wasn't sure were the mist was comming from, so I turned the motor off. I thought it might have been form a crack in the block or head that I had somehow missed.

  19. #44
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    The second video is after setting the throttle pick-up timing and idle rpm settings. We ran it about half an hour in all, most at a high idle, so only 9-1/2 break-in hours to go!! I think it sounds great, and as my son said, "can't wait to hear her screaming up across the lake!!"


  20. #45
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    she sounds great . so, your son likes screamers , eh ???,...

  21. #46
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Nice work. I wouldn't worry about the crank. I did a badly scored journal on 50hp 3 cyl Metro car engine crank with 400-1000 grit. The only difference is I didn't use a shoe string. It has 60k+ miles on the job and most of it doing a 100 mile daily commute running 4500+ rpms on the interstate. I've been meaning to drop the pan and check it but so far nothing is out of the norm...

    bp

  22. #47
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by Blacksting View Post
    she sounds great . so, your son likes screamers , eh ???,...
    apparently only in boats….

  23. #48
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by BillP View Post
    Nice work. I wouldn't worry about the crank. I did a badly scored journal on 50hp 3 cyl Metro car engine crank with 400-1000 grit. The only difference is I didn't use a shoe string. It has 60k+ miles on the job and most of it doing a 100 mile daily commute running 4500+ rpms on the interstate. I've been meaning to drop the pan and check it but so far nothing is out of the norm...

    bp
    Thanks, bp. I guess the best thing to do is (as it should be anyway) to break her in gently, then run it like you stole her. I can't imagine I did any damage at all. OMC cranks, so I've been told are harder than most, and come-on, 1000grit, really? and by hand to boot. I expect to get years and years of butt-kicking, tube flipping fun out of her!!

  24. #49
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Got the steering cable back in last night. I had taken it out because it was unusally stiff. I couldn't even begin to "palm" the wheel; almost took two hands to turn it. I hung it up, cut a small hole in the corner of a gallon zip-lock bag, slid it up to the rack, taped it off to seal it, and squirted light oil down through the rack, working it back and forth with the helm for about four weeks. I also took a bicycle inner tube, cut about an eight inch piece and hose clamped it to the motor end, after putting about four ounces of light oil in it as well. I think the oil at the engine end did more to free it up than the helm end. Makes me think that water had migrated in through the steering tube. Anyway, I can now turn it using the palm of my hand, though bending the cable to make the turns behind the dash and at the splashwell did seem to stiffen it up a bit. I also think it's about six inches too long, since the bends were quite tight in order to get the rack pushed far enough to the starbord side so as to match up to the helm. Tha cable says 13ft, 6inch, so if I do replace it in the future, it will be with a 13ft. cable.

  25. #50
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    Default Re: 1986 Johnson 70 Hp VRO Rebuild

    Quote Originally Posted by maineboat View Post
    Borrowed a compression tester this week end; 135psi top, 135psi middle and 134psi bottom. I'm very pleased, and gotta remember to write this in my service manual for future reference.
    ...
    ~ more later ~
    Nice rebuild!

    My guess is that the compression will be higher when the engine is run in.

    Good luck, Peter

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