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  1. jimmbo

    Good pitch to start with on motor/hull combo?

    In a word NO, the extra blade will kill your top end even more. You say you removed a quantity of wet foam, and did some hull repair. Did you at some point check the hull with a straight edge for Hooks or Rockers? A 1000lb boat with a V6 150 should really haul backside. Even for a tin boat a...
  2. jimmbo

    5.7 Volvo Penta GS Intake, Carb, Heads & Cam

    Look carefully at your intake. If your engine has the vortec heads, it likely came with a 4bbl intake with an adapter for the 2bbl Holley. While the 500cfm(378cfm when flowed like a 4bbl) Holley is a wee bit too small for a 5.7 turning 4800 rpm, it doesn't need much more. A small 4bbl(450 - 500...
  3. jimmbo

    Year-round oil weight for Mercury 50hp fourstroke???

  4. jimmbo

    Prop Pitch

    That is something a lot of people pooh-bah as uncommon. Propshafts bend quite frequently when SS props are used. My SS and Propshaft both were badly wounded on rocks at about 21-22 mph. So much for the much praised Rubber Hub saving the prop
  5. jimmbo

    Gt 150 gt

    Are you referring to the idle reliefs?
  6. jimmbo

    Gear oil questions.

    I was mistaken on the yr Hi-Vis introduced but here is a service bulletin
  7. jimmbo

    Year-round oil weight for Mercury 50hp fourstroke???

    This looks like it it might make you happy, it's not FCW certified, but Wally World has it, and it has thinness and thickness. Personally I wouldn't use it, but...
  8. jimmbo

    Evinrude manual says no “premium” oil??

    From the 1964 Johnson Brochure I'm in the process of looking for my 1965 90hp Owners manual
  9. jimmbo

    Adjustment advice (Pictures Inside)

    Auto Centering Rollers? The only places I've seen auto center rollers are on trailers like EZLoader
  10. jimmbo

    Bunk vs transom relationship

    Another pic of mine, taken immediately before the one above, it shows both the chine and outer strake both out of the water at the transom Where on the hull do the bunks make contact? From the keel to the strake, the hull should be straight, and the bunks should go to the transom. If the bunks...
  11. jimmbo

    Bunk vs transom relationship

    That molded-in Hook is along the chine. Many hulls have that, it helps plane boat quicker. As the boat speed rises the hull rises out of the water and the hook is no longer in the water, except when the hull banks on turns. If you put a straight edge lengthwise against the hull along the Keel...
  12. jimmbo

    New Memeber with a 1978 Merc 900 - Starting/Running Probs.

    My first merc was a 78 90hp, also on a 15 1/2 ft Crestliner Cruisader. 20 yrs after I traded it, it is still my favorite. A 78 would not have an inline fuel filter, it had a screen on the fuel pump inlet. An inline filter, if up stream of the fuel pump, can cause fuel delivery problems Try...
  13. jimmbo

    2001 Johnson 115 are they good or like the earlier 175's

    There were 115 FICHT Johnson's
  14. jimmbo

    Type C vs HiVis

    Type C was renamed Premium Blend in 1973
  15. jimmbo

    How do I remove 56 Johnson Javelin carb??

    FInal Hi Speed Mixture and low speed mix will need to be done in the water From a 1958 35 seahorse owners manual
  16. jimmbo

    How do I remove 56 Johnson Javelin carb??

    Hi Kathy Watching the second video, I will say you have the collar set to contact too soon. All the timing advance is supposed to be completed at the point of contact with the collar. The last paragraph on the page I sent you(post 88) explains the procedure. Here is here is a repost with the...
  17. jimmbo

    1985 90HP Merc Inline 6 Outboard - Opinions?

    That cowl says 86, the 85s had ugly brown stripes I had an 84 115, for 14 yrs. While it was far from trouble free(carb flooding, switchbox, trim pump motor, and bogging) it is still my favorite engine The 90s were great engines for low end torque. and you are correct bout them running out of...
  18. jimmbo

    How do I remove 56 Johnson Javelin carb??

    Reeds. Reeds don't break very often, when they do, the engine runs very poorly, like a dead cylinder type run, spits gas back out carb. They can also do a lot of internal damage, being a very hard metal. Regarding the sync issue. Here is a later 3rd party service manual excerpt Edit: Scott...
  19. jimmbo

    78 Johnson Trim Leaking

    You need to use a Tubing Wrench. it looks like a 5 1/8 sided box end wrench. These wrenches will prevent rounding of the Hex. You might have to do some customizing of the wrench to get clearances needed
  20. jimmbo

    How do I remove 56 Johnson Javelin carb??

    You have a RD-18, this page references RD 16 and up. RD 19(1957) is different http://162.144.28.33/lib/johnson/man...nson.html#/162 You may have accessed this manual earlier. If not you will find a lot of info. The cable end, looks like the set screws that grip the core cable came loose and...
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