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  1. jimmbo

    Mid1980's Mercury 2cyl 35hp Spark Plug Question

    While a lot of Oils(3rd Party) are said to Meet the TCW-3 Spec, that spec is over 30 yrs old. The Engine Manufacturers have Skin in the Game, and they know that if an Engine blows Up, throws a Rod, etc, People will cuss and swear at the Engine Brand, because to them Oil is Oil. I suspect the OEM...
  2. jimmbo

    25hp evinrude outboard

    The 25hp got the Bigger thru Hub Exhaust Gearcase in 1987. Pre 87 had the Gearcase shown in Post #3
  3. jimmbo

    Random change in rpm at wot...BIG CHANGE

    Without knowing what the WOT Rpm is, you can't arbitrarily claim a sweet spot. You do not prop for a Speed at a certain/preferred Rpm, regardless of how the Engine Sounds
  4. jimmbo

    1988 Merc 115 inline 6-Rough in low gear only after WOT

    My 1984 inline 115 didn't have a Low Gear. I wonder if the Idle Stabilizer was disconnected? I know a lot of People say to unhook it, but Mine never gave any Trouble, even after 14 yrs. My 115 used to get Stuck Floats quite regularly and would run crappy, but I could also see Fuel dripping out...
  5. jimmbo

    25hp evinrude outboard

    The 25 didn't get that Gearcase and Transom Bracket till a few years later
  6. jimmbo

    25hp evinrude outboard

    Those are Water Inlets, for when the Engine running in Reverse. In reverse, the Prop is pulling Water Away from the Regular Water Inlets, which are on the Front of the Exhaust Snout
  7. jimmbo

    1st Boat

    Because Evinrude no longer exists, I would pass the one with the E-tec, simply because the Engine is far less likely to be an Owner serviceable Motor, as in any Diagnosis, cause it is a Computer controlled DI Engine. The Older V4, which has a history of breaking Piston Rings, is a Simple to...
  8. jimmbo

    Mid1980's Mercury 2cyl 35hp Spark Plug Question

  9. jimmbo

    Mid1980's Mercury 2cyl 35hp Spark Plug Question

    It is. Mercury was sold in Merc Dealerships, while Quicksilver was available to Non Dealers, but these Days, all bets are off on that
  10. jimmbo

    J30JRSIE 30 hp Outboard - Carb Question

    Before you go ripping the Carbs off, see if you can get a replacement Orifice, install it and if the Problem(s) is solved. Might save you the Hassle of having to do a complete Link and Sync.
  11. jimmbo

    2008 Volvo Penta 5.0GL Carb Problems

    That is the Bowl Vent, on a Marine Carb, is shaped like that so any Fuel expelled by it, goes into the Motor, not the Bilge
  12. jimmbo

    Engine Oil viscosity mixing?

    The Oils are mixable, you will just end up with that is a Bit more Viscous when cold, and a little less when warm.
  13. jimmbo

    2008 Volvo Penta 5.0GL Carb Problems

    That Power Valve looks like it was was exposed to Salt Water, replace it with one of the same Value. Just don't assume if there is one in the Carb Kit it is correct That carb looks dirty where the Air Bleeds are. The Accelerator Nozzles are in plain sight, under that Big Philips Screw When you...
  14. jimmbo

    Engine Oil viscosity mixing?

    If Volvo specs SAE 30 Synthetic, they have their Reason(s). However, is the 25/40 syn a Volvo or Mercury/Quicksilver Oil? If so, I wouldn't hesitate to use it
  15. jimmbo

    2008 Volvo Penta 5.0GL Carb Problems

    Post a pic of the Covers you are trying to remove. Edit: you were posting as I was typing
  16. jimmbo

    2008 Volvo Penta 5.0GL Carb Problems

    You really need a Book that describes and shows what the Holley Fuel Circuits look like. I have searched Online for the Holley Idle Circuit Diagram, but can only find one, but is was for an International Harvester Tractor and had an adjustable Air Bleed(which permits fully closed Throttle Plates...
  17. jimmbo

    2008 Volvo Penta 5.0GL Carb Problems

    I know Holley used to put a Plastic, easy to remove, Cover over the Idle Mix Screws on the Metering Block. As for One Side Dripping Fuel, as they share a Common Fuel Bowl, is the Carb/Boat/Trailer Level?
  18. jimmbo

    1974 9.9 Johnson running problems. I can get it started but then runs very ruff.

    What did you mean when you said "Extensive Work done", and when was the last Time it was run, prior to the Incident you experienced?
  19. jimmbo

    13x19 Prop Vs 13.2x19

    based on Diameter and Pitch, no difference. However, if there are differences in Blade Area, # of Blades, changes in Rake and/or Cup, there might be a different outcome
  20. jimmbo

    1969 85hp starflite, low power and cutting in and out

    I believe you said you replaced the Rotor and Cap.
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