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  1. M

    2006 mercury 150 opti-Max

    I’m looking to purchase a 2005 Polar 2100CC - Center Console Boat with a 2006 mercury 150 opti-Max . Add says engine has 300 hours . Is that a lot of hours for that year and motor ? How many hours can one exspect to get out of that year opti max . What questions should I ask or checks can I...
  2. M

    2000 70 hp

    So the guy sent me some pressure readings this morning Original post said top to bottom 135, 130, 138 Yesterday after a second reading 135, 120, 130 Today he's saying 120, 115, 128. ( I see 118/119, 114, 130 ) I think it was power tuner he sprayed in the cylinder ( middle which was...
  3. M

    Engine cutting off high rpm .

    The guy spayed some stuff , forgot what he said it was , into the spark plug hole said it would clean some of the carbon on the rings and that it might make the compression go up right away . He tested it again and it was the same . He then said proper way to do it was to run it through the...
  4. M

    Engine cutting off high rpm .

    So since my last post I had a marina mechanic that works on Johnson’s run a compression test on my 40 hp . Numbers were 120 top and 95 bottom . I had my eye on another Johnson 70 hp and was told the compression was 135, 130, 138 . I Went to look at it today and the guy ran the compression...
  5. M

    2000 70 hp

    Oh he did run for a little while a few minutes with the muffs on, So those numbers were done 15 minutes or so after it was run . Also hmentioned something about that a low battery can affect the numbers as well . Hot or could the numbers should still be within the 10 % correct . How long...
  6. M

    2000 70 hp

    So I went to check out the motor eveything was going well til I asked to see the compression test . He had listed 135 , 130 , 138. After testing a couple times for me The last reading. Was 135, 120, 130. I didn’t like the 120. And was concerned it was more than 10 % difference and...
  7. M

    2000 70 hp

    Chicago area , seems like there is a few but no more than a handful of places/ guys that work on them within an hour ride or so at least From the searching I have done so far . $2750 . Guy selling it is a dealer/ outboard reseller . Seems to be very knowledgeable and to have checked...
  8. M

    2000 70 hp

  9. M

    2000 70 hp

    Is there a downside to not having a vro system and just adding the oil to the gas tank ?
  10. M

    2000 70 hp

  11. M

    2000 70 hp

    What would be a fair amount of Ben franklins to pay for this model and year in good running condition . ?
  12. M

    2000 70 hp

  13. M

    70 HP Johnson compression test

    Ok , got it . Still trying to navigate this forum . I did post a new one with some other questions regarding the 70 hp motor . Would you mind taking a look at it ?
  14. M

    2000 70 hp

    Looking to buy a 2000 Johnson 70 hp What are some things to check, questions to ask before I buy? The compression is 138,130, 138 . Looking to buy a 2000 Johnson 70 hp What are some things to check or questions to ask before I buy? Listed description is : The compression is 138,130...
  15. M

    70 HP Johnson compression test

    What’s this top secret file and and how do I find it ? Also is A compression of. 138 , 130, and 138 good on a 2000 70 hp
  16. M

    70 HP Johnson compression test

    What’s this top secret file and and how do I find it ? Also is A compression of. 138 , 130, and 138 good on a 2000 70 hp ?
  17. M

    70 HP Johnson compression test

  18. M

    Engine cutting off high rpm .

    I happened to look on the internet to see what a used motor would cost if I decided to go that route rather than fixing the 40 hp . Here is a listing I found. My boat says it can take up to a 75 hp motor . I figured a Johnson would be compatible with my boat . It’s a 2000 logic , center counsel...
  19. M

    Engine cutting off high rpm .

    I had a minute to check out the motor today . I removed the spark plugs , which were recently replaced back in November . They were very brownish black with a lot of build up on them . I can send a picture of the plugs if that would help diagnose anything. I tried testing the horn according...
  20. M

    Engine cutting off high rpm .

    Can a compression test be done cold ? Will it give me an accurate reading ?
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