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    J90MLCRD Port extension-Any value to this part?

    My '84 90hp was missing these when I got it. The one I do have came with some other parts I bought off eBay. Is it worth searching for the other one? I had a two stroke rocket as a kid. I put velocity stacks on the mikunis after jetting cuz that's what we did back then. Are these some kind of...
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    J90MLCRD-'84 90hp Broken exhaust bolt boss

    The pic wil do a better job of describing what I'm up against. I cannot be the first to have had to deal with this. It is a second hand block that had good enough cylinder liners to bore, but has been into before and was put back together with box store grade 3 garbage 1/4 20 exhaust cover...
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    1984 Johnson 90 crossflow J90MLCRD-No exhaust adapter to outer exhaust housing gasket?

    I have a new can of that for the build. Thanks again. I don't get on here much anymore. Life happens, I love motorcycles too. But it was good to see your name pop up again. I'm gonna need some help repairing a lower for my 60 at some point in the future. I've got to get this never-ending 90hp...
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    1984 Johnson 90 crossflow J90MLCRD-No exhaust adapter to outer exhaust housing gasket?

    In the process of putting this one back together. I have the full rebuild kit from WSM. There is no gasket for the exhaust housing adapter (part # 0324059) to outer exhaust housing (part # 0435318). It's a long story as to why this had to come apart. No need to go there. On the BRP parts catalog...
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    Old topic. I've searched. No model # on the disc.

    Racerone, there is no cowling. This is the bare block I just bought today with warranty. I'll include pics. There is a 6 digit #. It looks just like a BRP #. I've included it. 329819 But BRP parts search doesn't recognize it. There is another 5 digit # that looks like a date. 919 94 I've also...
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    Old topic. I've searched. No model # on the disc.

    I'm familiar with INTRODUCES. Familiar with how to identify by model #. This block, and it's only a block, only has a string of numbers under the stamped circled M on the little silver disc. Looks like a freeze plug. Some call it a welch plug. C2832834. Not the familiar J88TSLEOC. Right now I'm...
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    1984 J90 HP .060" over. Why not?

    There are dozens of Starrett inside mikes out there. Just depends on what. guy is willing to pay. Looks like a decent used set is around $100 or less.
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    1984 J90 HP .060" over. Why not?

    So... I've put everything on hold until a suitable block...3.529" bore wear or under can be found. It depends on who's reading the micrometer too. The hangup is the majority of ebayers don't post and won't warranty a block to come in under a specific range. One does, a guy from Washington, The...
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    1984 J90 HP .060" over. Why not?

    Ok... still learning about some of the finer points on these engines. I was lead to believe mild chamfering ports after a bore job lessened the chances of a ring hanging on them. Your thoughts?
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    '84 90 hp V4 Unknown hole in mount bracket. Zerk or no? Should it even be there?

    I was cleaning things up when I found this hole from the inside of the bracket. I cleared the crud out of it and it then went clear thru to the outside. It connects outside atmosphere or water directly with the pivot shaft keeper, which sits in a race of its own. What was grease inside of this...
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    1984 J90 HP .060" over. Why not?

    I have either gone through the cooling system ... or bought for it, new everything. Thermostat, connector hoses, not installed yet, water pump, including stainless plate, took care of that when I had the lower off. It's since been sent out to a retired JE genius for a complete reseal. But I...
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    Wont start. '89 evinrude 70hp

    I've got an '89 60hp. Almost a ringer for yours. If the kill switch wire is grounded with anything anywhere in the circuit, it will take out spark. Maybe an intermittent ground with the kill wire. I accidentally pinched mine in the control box one time after putting an ignition switch in. Took...
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    No aluminum model # plug on this powerhead.. Old 2 cylinder. How to identify??

    The riddle continues. The only definitive thing I could find that BRP parts search recognizes is the intake #. It was used on 1969 models. 16 of them. I found two more #'s. One tucked into a recess under the thermostat housing on the head. Which is actually cast into the head itself, not the...
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    No aluminum model # plug on this powerhead.. Old 2 cylinder. How to identify??

    Thanks for your reply. That is my concern. What is the hp rating? It makes good compression as it is. A 1/2" drill chucked to a socket on the crank flywheel nut won't turn it over. I realize that's a silly compression rating, it's just for info. I was trying to get a compression #. It does spin...
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    1984 J90 HP .060" over. Why not?

    I was posing the question as if there are no drawbacks. Overheating, warping, flex. etc. I'm not building a race engine. I bought this as a fixer upper. Cruising speed will not exceed 4K. My '89 60 hp I3 rumbles along nicely at 3500 to 4000 rpm. It planes quickly with a cupped stainless prop...
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    No aluminum model # plug on this powerhead.. Old 2 cylinder. How to identify??

    I bought this plain powerhead years ago to repower a '73 18 hp fastwin. The man I bought it from was a fixture on this forum, but he passed some years ago. Tashasdaddy. We called him TD. I can't find any info anywhere on this block with any #'s. There is no plug with the familiar model # stamped...
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    1984 J90 HP .060" over. Why not?

    If .040" doesn't clear the scoring on my block .060" over pistons are available. The walls would be thin. Ok... rings don't wear against anything but the sleeve walls anyway. Right now it looks a lot better than buying some one else's used block which will then have to be bored as well. It's a...
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    1984 J90MLCRD='84 90 HP Johnson- No sleeves??

    I got this one as a "project boat" It hadn't been in the water in 11 yrs. It's the right #'s. My compression rings didn't break. That itty bitty flange that holds the wrist pin snap ring in place broke. I was just saying according to Mr. Hayes, our local old time JE guru, compression rings would...
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    1984 J90MLCRD='84 90 HP Johnson- No sleeves??

    Thanks for the input guys. I've got the specs from an authentic JE service manual. Upper main journal 41.158", large center 55.563", lower 35.001". On another note. I've loaded a pic of the culprit piston. The one that killed this motor. What caused this? Ideas? I ask because one of the blocks...
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    1984 J90MLCRD='84 90 HP Johnson- No sleeves??

    Thanks, there are a couple, in the $300 range. There are others on the net in the $500 to $800 range. That's too steep for me. Absolute worst case is to sleeve it. The porting is the hang up. The machinist I talked to said he's done a bunch of these "back in the day". But he mentioned, "a lot of...
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