Recent content by MaPaHa

  1. M

    Leaking fuel Rail "O" Rings - 1995 Johnson 150

    I'm putting my Johnson 150 back in operation after a 2 year break.:)​. I noticed the fuel rails were leaking gas when I pumped up the bulb so I removed one side to repair it and I cannot find the O rings that fit it anywhere (its the weekend). It looks to be about 5mm inside dia. x 3mm...
  2. M

    1977 Evinrude 140 HP Bubble Back runs fine on hose but not in lake

    My '77 Evinrude 140 HP Bubble Back will run fine on a water hose attachment but wont hardly start and idle on the lake (it cranks over fine). If you trim it out high it will start and you can get it going but it has a severe loss of power taking off. Once it gets planed out it runs OK. As I...
  3. M

    Hydraulic / Power Steering Upgrade

    I'm thinking about upgrading my steering system to some type of "Power Steering" unit. Right now I've got a Tele-Flex anti-feedback single cable system that works well for no feedback but it's hard to steer when you get past cruising speed. My pontoon boat is a tri-toon with a 150 HP running...
  4. M

    Late 70's Evinrude 140 weak spark

    This is an update to another thread I had going but seems like it went missing. My problem (I thought) was that I had no spark at cranking speed on at least one cylinder. This is from what I remember from last year. I did a spark test on all cylinders one at a time and started the motor each...
  5. M

    Welding Strakes on Pontoons

    I had lifting strakes added to my pontoons and as I've mentioned here a few times, there are leaks that resulted from the welds that are behind the strakes. We have pressure tested the toons and sprayed them down with soap solution and there are no leaks that can be seen around any of the...
  6. M

    '78 Evinrude 140 no spark starboard side while cranking

    My '78 140 V-4 crossflow motor runs ok but it does have a little trouble at low speed. It takes off fine and runs out good. I bought a spark tester to use on another motor and got no spark at all so I wanted to test the tester. I put it on both plug wires on the starbord side of this motor...
  7. M

    Sealer for Heads on '96 Johnson 175 Fst Strike

    I can't get the OMC sealer locally for the heads that use O-rings on my '96 175 Johnson motor. Is there any difference in RTV silicon and Permatex #3? I've heard not to use silicon on heads but this is to seal the water passages the best I can tell. Ant tips on applying it because I've never...
  8. M

    Bad temp sensor on ?77 Evinrude 140 Cross-flow?? How to remove??

    I?m pretty sure I?ve got a bad temp sensor on the port side head on my 1977 Evinrude 140 ?bubble back? Cross-flow motor. After getting an alarm a year or so back I had the water pump replaced along with both thermostats by a reputable boat mechanic. After that I would still get an occasional...
  9. M

    Formulas for: Speed, Slippage and RPM

    Here are some formulas for manually figuring theoretical speed, actual speed, slippage and RPM: Theoretical Speed Equals: RPM / Gear Box Ratio x pitch x .000947 = Theoretical Speed 5,000 rpm / 1.87 x 17 pitch x .000947 = 43 MPH Theoretical Actual MPH Equals: Theoretical...
  10. M

    94 Javelin 17 foot + F/S with 78 Evinrude 140. Best prop?

    I have a 94 Javelin 17 foot + fish and ski boat that I just installed a 1977 140hp Evinrude 140 V4 cross flow ?bubble back? motor on and I?m trying to get the right prop. This motor uses a 13 inch to 13.875 inch dia prop with 13 spline small hub. I have three props I?ve tried and still...
  11. M

    Disable ?no oil alarm?. Mixing gas now ? older motor

    I have a mid 90?s javelin fish and ski boat that had a 150 Johnson with oil injection. I put the motor on another boat and installed an older 140 Evinrude in its place. The wiring harness to the engine was an exact match and the only wiring I had to modify was for the trim. Got it working...
  12. M

    Link & Sync ? 1994 Johnson 150 ? J150ELARV

    I?m rebuilding the carbs on this motor because of idle ? takeoff problems and have found at least two concerns that would cause the problem. The biggest problem is one of the O-ring gaskets between the throttle plate and intake is messed up so hopefully this will fix it along with the rebuilt...
  13. M

    Idle/Air factory setting 1994 Johnson - J150ELARV

    I?m cleaning and rebuilding the carbs and throttle plate on my 1994 Johnson 150 V6 loop charged motor and I?m getting conflicting information on the setting for the idle/air screw adjustment. During disassembly I checked the existing settings and all but one of the carbs was set at 5 turns out...
  14. M

    1995 Johnson 150 wont idle well, stalls on takeoff

    I have a 1995 Johnson 150 60 degree V-6 loop charged engine. When it?s cold and the first start of the day it will idle the best but still not great. When it?s been run a while and turned off for a bit and then restarted it?s hard to get it to idle and it stalls/dies when taking off. You can...
  15. M

    Using Industrial Grade Epoxy on Aluminum Pontoons

    Has anyone used the 3M Automix epoxy or any similar products such as Sem, Weld Mount, Fabrico or Norton on aluminum pontoons? These products seem to be very popular in the auto body repair business and I?ve watched several u-tube videos on them and the results are impressive. I?ve got a...
See more
Top