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    1979 Johnson 235 Blown Head gasket?

    I just built this engine and have been running it on the muffs to get all the bugs worked out. I pulled the head to replace the head gasket because I reused this one. This was a new head gasket and had an hour on it when I pulled it. It was pulled because I was having a over heating issue and...
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    Is it normal for one bank to run hotter than the other?

    I have a 1988 175hp (I am running a 1979 235 powerhead, but everything else is the 1988 175) This is a new engine build. My starboard side bank is running warmer than the port side. The port side is about 158 and the starboard is about 170. The starboard side was running about 190 and I changed...
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    1988 Johnson 175 stiff to shift at engine

    My 1988 Johnson 175 is stiff to shift at the engine. For those that have read some of my previous posts, this is the 1979 engine build. I have had a few issues and I know it is coming to a point where the lower unit will need to be rebuilt or replaced next year. Just a few goofy things it is...
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    Can't get linkage setup correct or reverse 1988 Johnson 175

    Ok, I have a 1988 Johnson 175 that I have put a lot of time in after building a new engine. The linkage setup was finicky with the last one and I may not have had it completely setup right the first time. But I have pulled the lower unit and have measures the shift rod to spec and setup the...
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    Can i use this carb

    The carb I have looks to be off of a 1988 XR150. part # 334330. I was rebuilding the carb and managed to stick the sharp tool I was using to punch out the disposable plug when it managed to perfectly land in the hole that sprays fuel in the carb. I tried fixing the hole but it managed to get...
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    Looking for a solution for Carburetor problem

    I currently am working on a Johnson 1979 235 block that I have just rebuilt (no serial #’s but matching case halves). I am currently using the intake manifold, carburetors (1-3/8) and electronics from a Johnson 1988 175. The engine originally came to me without VRO. It’s a long story and it’s...
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    Johnson 1979 235hp inner exhaust cover gasket question

    I have a johnson 1979 235hp and I am trying to put the inner exhaust cover gasket on the block. It also has two o-rings that are placed here as well according to the manual. The gasket I have that came with the set is not cut out large enough in the the spot for the smaller of the two o-rings...
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    Johnson 1988 175hp ignition coil silicone cracking (replace or no)?

    I have a Johnson 1979 235hp with Johnson 1988 175hp electronic and carbs. I am building a new engine as the old one had a connecting rod go through the block. While going through the electronics I have found one ignition coil that has a crack in the casing and needs to be replaced. I have two...
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    Johnson 1979 235 inner exhaust cover gasket and the two O-rings

    I have a 1979 235hp that I am building. I found a brand new block, so that is what I am working with. The inner exhaust cover gasket I have seems to have some questionable issues. some of the bolt holes don't completely line up when the majority of the other bolt holes do line up. Also when the...
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    1979 235 inner exhaust cover gasket and o-ring problem

    I have a 1979 235hp that I am building. I found a brand new block, so that is what I am working with. The inner exhaust cover gasket I have seems to have some questionable issues. some of the bolt holes don't completely line up when the majority of the other bolt holes do line up. Also when the...
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    Gel Seal 2 question for Johnson 1978 235hp rebuild

    I gel sealed my block today. The spray activator I used was a couple years old. I couldn't find anything as for information as a expiration date on this stuff but wanted some thoughts on this as well. Second is that I confused my torque specs when torquing the block. So I torqued it to 10 ft lbs...
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    Gel Seal 2 question for Johnson 1978 235hp rebuild

    I gel sealed my block today. The spray activator I used was a couple years old. I couldn't find anything as for information as a expiration date on this stuff but wanted some thoughts on this as well. Second is that I confused my torque specs when torquing the block. So I torqued it to 10 ft lbs...
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    Need help with a flywheel

    I have a 1978 235 using 1988 175 carbs and electronics. The Flywheel is off of the 1988 175. The flywheel I have needs to be replaced. It had to be forcefully removed due to pulled threads. It has four broken magnets and some dents that could be removed by a good machine shop and balancing, but...
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    What is the difference in Johnson outboard fuel pumps

    I have a Johnson 1978 235 I am building. I am using carbs and electronics from an 1988 175. I have fuels pumps with the Bottom pump part numbers 328-781 on the front with another # 393648. The Top pump part # is 343462 and the other # on it is a 438559. The original fuel pumps that i was using...
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    What is the difference in Johnson outboard fuel pumpsg

    I have a Johnson 1978 235 I am building. I am using carbs and electronics from an 1988 175. I have fuels pumps with the Bottom pump part numbers 328-781 on the front with another # 393648. The Top pump part # is 343462 and the other # on it is a 438559. The original fuel pumps that i was using...
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    Pitting or Casting Defect in Brand new Block normal?

    I have a brand new 1978 Johnson 235 HP Block. It was unused and still in the crate. It was a rare find for sure. While cleaning the block after honing the cylinders I found what looks like a possible casting defect inside the lower exhaust port of cylinder five. Looking at my old block, it looks...
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    Johnson 235 block with 175 carbs

    I could really use some help and advice. I have a 1978 Johnson 235 (235TXL78RJ5002998) block with johnson 175 (J175TXCCMR7824277) carburetors and electronics but NO VRO. Its a long story how this ended up this way but it is what I am stuck with now. I have just spent the last 2 years completely...
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