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  1. J

    Are my reed valves bad?

    Hello, I have a set of used boyesen reed valves for an evinrude v-4. I have been told to check them for any light passing through to determine if they are ok. When I hold them up to a bright light, a couple of them let just a sliver of light through, like less than the thickness of a playing...
  2. J

    How do I use tilt/trim?

    Hello. I have a question about the propper way to use tilt&trim. I have a 1970 KONA fiberglass 18' boat. It is low profile but the bottom isn't actually a flat bottom and have an evinrude 125 v4. I have a CMC Tilt&Trim. I never have a problem getting on plane with this boat. It always goes on...
  3. J

    What is a turbo prop?

    What is a turbo propeller? Is it the same as a cupped propeller and why does a turbo prop allow for higher top speed?<br />Thanks
  4. J

    Advantage of aluminum to SS propellers

    Hello. Can someone help me with a question I have? I have heard that SS props are better because they dont flex, but they are considerablly heavier. Does the nonflexing aspect 'outweigh' (ha ha ) the weight factor? And is the weight a factor? thanks..
  5. J

    How high should I mount my Evinrude V4?

    Hello. All I want is top speed. I have been told that the evinrude v4 (Mine is a '72 125) work best mounted on the highest notch. I have mine on the next to highest now. What should I do?
  6. J

    Advice for propeller size on an Evin. 125 '72

    Hello. Could someone please share some advice about a propeller I am looking for? First let me state that all I want is top maximum speed. I have an Evinrude 125 in good working order. I have found that with a 13 3/8x17 prop, I hit about 45mph topped out at 5500 rpm, then I tried on a 12 3/4x21...
  7. J

    Boysen Reed Valves, Should I Convert?

    Hi, I have an Evinrude '72 125 and have seen that the boysen reed valves are better than stock in areas of idleing and performance. I am considering a purchase. Can anyone give me any advice? Thanks.
  8. J

    Tech. question about 72 Evinrude 125 timing

    Hello, I have a question about my 72 125 Evinrude. After finding that my PULSE pack was bad, I converted the ignition to the points type from a '69 85hp motor I have. I switched the whole ignition system, even the alternator. It runs great, but I am wondering about something. On the stock 125's...
  9. J

    Making a starter pull string

    Hello, I have a '72 Evinrude 125 and want to make a pull string which wraps around the flywheel in its spool for emergency starting if the starter goes out. Can anyone suggest if it is better to use a strong rope, or cable, and how long should it be. I was just thinking that if it was too long...
  10. J

    Leaded or Unleaded Fuel?

    Hello. I have a '72 Evinrude 125 and have obtained the shop manual which says to use leaded fuel (underlined in manual to stress the point). I realize that was back before the ban, but would I be better off using lead additive? Also, is it ok to use octane boost in the fuel also for extra umph?
  11. J

    Revised question for Dhadley Thermo-switch

    Dear Dhadley, Thanks for the information about the Thermo Switch on my '72 125 Evinrude which I would have never have found elsewhere! I have bypassed it, but I still have the same problem which I didn't fully explain before. What is happening is that when the ignition is on, and engine not...
  12. J

    what is max allowable rpm's on a '72 evinrude 125

    Hello, I run a '72 Evinrude 125 hp motor on an 18' fiberglass Kona boat. The tag on the mounting bracket indicates RPM 4500-5500. I thought I saw somewhere where someone said it was ok to run up to 6000 RPM. Is this true?\Thanks
  13. J

    '72 Evinrude 125 compression is 125psi. is ok??

    Hello, I have a '72 Evinrude 125 with an even compression of 125psi. on all 4 cyls. taken with all spark plugs removed, WOT, and fully charged battery.<br />Is this within spec. for good operation?<br />Thanks
  14. J

    '72 Evinrude 125 "Choke/T ermo-Switch"

    Hello, I have a '72 Evinrude 125 and notice that, although I have the choke linkage ajusted correctly, when choking on a cold start, the solonoid (which I have changed out) dosent seem to quite pull the butterflies all of the way closed. It stops a little short so I actually have to manually...
  15. J

    Evinrude V4 Tachometer question (revised)

    Hello All. Sorry about the confusing question I recently asked about the tachometer. Here is a revised one. Is there an electronic circut I can build to use an automotove Tachometer on a 72 Evinrude 125 which is made for the alternator pick-up type tachometer. I use the correct alternator tach...
  16. J

    Older Evinrude V4 Tachometer technical question

    Hello. I have a '69 Evinrude 85 with the spark amplifier points ignition that runs a tachometer off of the spark amplifier and (forgive me for not knowing the correct terminology)I call it a heavy tach, because at the boat parts dismantler, there are heavier tachs with a switch on the back for...
  17. J

    Do they make premade upholestry ?

    Hello! I have a nifty 1970 Kona 18' ski boat but the upholestry is bad. It is tuck and roll. The seats are back to back, but not like the modern kind which look like 2 chairs back to back, they are kind of round bucket, like lounge style. Does anyone know what these type of seat are called and...
  18. J

    Evinrude flywheel balance question

    Hello, kindly requesting information from a knowlegable person. I have a '72 evinrude 125 which had the cd pulse pack. I converted it to a points type ignition system from a '69 85hp. All that has worked fine. My question is are thge flywheels on the Evinrude v4's balanced to the crankshaft or...
  19. J

    Whats differencem between 115 & 125 Evinrude?

    Kindly requesting information from knowlegable person about the difference between older (70-72) Evinrude 115 and 125. My literature shows the displacment to be the same at 99.6 cid. Is there a difference? Thank You!
  20. J

    85hp carbs:1 3/16 or 1 5/16?

    Hello, Could someone help me with a problem that I have with my '70 85hp evin outboard. I want to put the bigger 1 5/16 carbs on to get a little more power whereas I should have the smaller 1 3/16 on there now, but after totally inspecting the carburators on my bench, the only number besides a...
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