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  1. S

    hard start when cold 78 140

    Just got the motor back on the boat and am having an issue with cold start. I get a lot of cranking and some sneezing and eventually it will start. It smokes pretty good when it does which made me think it was flooded. Once it's running it runs great. No issue shifting, good idle, good...
  2. S

    77 Evinrude 70HP WOT RPM

    I swear I had this question answered but can not seem to find it. I put my back up motor (70 hp evinrude) back on the boat until I can get the 140 fixed but am unsure about the max RPM. It's been two seasons since I used it. The motor runs great and runs at 5400 at WOT. This is on a...
  3. S

    140 Johnson won't rev

    This is how it is installed
  4. S

    140 Johnson won't rev

    Can not get full engine speed under load. This is a new problem this season. Motor will not rung up to full speed. Three trips out so far and the top speed varied, one trip I could get 4200 for part of the day, another trip could only get 3000 all day. Boat was loaded the same, people...
  5. S

    how critical is float level

    78 Johnson 140. Fresh powerhead but it's not running right. Running on the muffs it will act as though it is loading up at high idle and occasionally "skip" accompanied by a good puff of smoke then clear up for a bit and do it again. Under load it ran pretty well but would not come up to full...
  6. S

    not sure what direction to take

    I pulled the 140 I've been fighting with for the past two seasons and tore it apart today. I was advised that the compression was a bit low and it was getting lower so I figured I needed to open it up. My hope was to do a refresh but I found it ingested something and needs a new piston and...
  7. S

    leak from water transfer tube

    After pulling the gearcase to reseal it, it seemed as though I was getting too much water out of the bottom of the midsection. It's always pushed water from the small hole in the back but I was getting water out the seam between the gearcase and midsection. After a lot of playing around with it...
  8. S

    Ignition problem I think

    78 Johnson 140. Was running great then last weekend it would not idle in the water but it ran on the muffs before heading out. After some messing around with it I gave up and called it a day. I found a chunk of debris in the fuel filter so I went through the fuel system for good measure and...
  9. S

    fusing rectifier

    I asked this question on another forum but the one response recommended I loom my wiring better. That is true but I need another opinion. The 140 in my signature had a tach problem that went un-diagnosed for a day out on the lake. Yesterday I found the tach lead had grounded in the control...
  10. S

    78 Johnson 140 idle jet size

    I'm cleaning the carbs of the 140 in my sig and noticed the idle jets are different from side to side. Both carbs are the same with a #34 in one side an a #31 in the other. Looking at the diagrams here tells me I need only one idle jet for a 140, which has to be a mistake, but at that it says a...
  11. S

    Is this an exhaust leak?

    New to me 140 in my sig. It has a lot of junk built up on the outside of the exhaust housing. This was accompanied by black goo in the transom of the boat it came off of. I assumed the mess in the transom was gunked up water leaking out when the motor was tilted all the way up for transit...
  12. S

    Which outboard to choose

    I have an opportunity to buy two different outboards. Both are late 70s models of similar HP ratings and will be used on a 24 foot pontoon boat. One is a Mariner inline 6 and the other is an Evinrude V4. The Mariner looks to have been well cared for but the more I look at it the more the...
  13. S

    Merc 115 things to be aware of?

    I've been looking for a 115 for the pontoon boat. I've run across a few possibilities for Mercs. These are all 70s era 6 cylinder "tower or power" motors. My limited OB experience is with my current Evinrude 70 and I'm pretty comfortable in evaluating an old Rude but I know very little about...
  14. S

    power head swap

    I'm looking for a 115 to replace the 70 on the pontoon boat. While reading threads about different motors, looking for what brands are better than others, I ran across of few guts that had swapped out powerheads onto different lowers. I found a guy selling a 115 Johnson with the gearcase in a...
  15. S

    77 Evinrude 70 cab problem

    I'm having issues with this motor idling in the water. IT idles fine on the muffs but does not want to stay running while in the water. I've been doing a lot of troubleshooting and today I was checking for vacuum leaks with carb cleaner. For good measure I shot a bit down the carbs and on the...
  16. S

    1977 Evinrude 70 fuel issues

    Let me start by saying that I'm new to Outboards but am very versed on engines. The engine in question came to me with a pontoon boat project and had sat for at least a year. The engine started but did not want to stay running and the fuel pump was leaking. My assumption was air leaks and I...
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