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  1. jimmbo

    Prop Advice

    The normal way of getting on Plane is to use Full Throttle, then back off the Throttle as the boat nears the desired speed. As for propping, it is desirable to prop in the upper half of the RPM Range, but going for the max at normal load opens up the risk of over revving at light loads if...
  2. jimmbo

    Safety chains are hot?

    Fuses pop when they are asked to carry more current than designed for. If the Safety Cables were indeed completing the circuit, they are large enough to carry more current than the Trailer would ever use. If the Hooks or whatever attaches the Cables to the Hitch, can flop around, they could get...
  3. jimmbo

    Crossflow 115 BIG issue

    3.500" for the 99.6 cu.in. 115
  4. jimmbo

    1986 90hp Merc pwr of twr lower unit disassembly

    At the front of the Propshaft, there is a Hole, that the shift plunger goes in to move the Clutch Dog. 3(I think) balls go in there to provide an antifriction friction surface for the Plunger when the Propshaft is spinning. This is not the case for your engine but the Propshaft assembly is...
  5. jimmbo

    1986 90hp Merc pwr of twr lower unit disassembly

    I will assume you mean Pinion Gear, not Planetary Gear. Once the Nut holding the Gear to the Driveshaft is removed, there is nothing but some friction of the splines holding the gear on. You say you found some pieces of Bearing in the gears? How do the Teeth on all the Gear look? If the Bearings...
  6. jimmbo

    Mercontrol problem

    Which control? Picture please
  7. jimmbo

    Timing curve for VP 7.4 with EST ignition

    I would be leery of putting more than 36 degrees into a BB Chevy
  8. jimmbo

    Demon 2bl carb getting too much fuel

    Demon is made by Holley and some Parts will swap
  9. jimmbo

    2005 VP 5.7 Gi-e, Rough Idle No Power to Plane

    Does the Boat have a Water Separator Filter? Perhaps those 50 gallons were not just Gasoline.
  10. jimmbo

    Lack of power

    Check the Firing Order, and verify that the Wires are going to correct Cylinder. Swapping a couple wires may or may not make a difference. However if you already have 2 swapped, 2 more can certainly kill the engine.
  11. jimmbo

    Misfire diagnosis

    Disconnect the Wire at the Spark Plug while engine is running, using insulated Pliers. That will show if that cylinder was firing or not
  12. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    I remember seeing that on the XD100 Label when it first came out. Last time I checked(a couple of years ago), that Caveat was no longer on the Label.
  13. jimmbo

    What brand of 2 stroke oil do you use for your Johnson Evinrude 2 stroke

    When I owned an Outboard, I always used Oils from the Engine Manufacturers(OMC and Mercury). They are Very Good Oils and don't cost much more than a 3rd Party Oil. As for the smoke, it will help keep the Mosquitos at Bay, and I really like the Smell of Burnt TCW-* Some will argue that any Oil...
  14. jimmbo

    1972 Merc 650E 3 CYL....fuel system Qs

    Wires can break internally unseen. I would be very surprised to find the Insulation uncracked, on that motor, as Mercury had bought enough wire with an insulation that didn't age well, to go to the Moon and back severqal times.
  15. jimmbo

    Does EFI solve the hard start/cranking issue?

    The Wires on the Lark went into the Exhaust Housing about 1/2 way down. If they were getting burnt, it was likely from not enough Water in the Exhaust. The Hydro-Electric case on the Triumph, would default to Forward any time there was no Power, going to the Shift Solenoids, and/or any time the...
  16. jimmbo

    1989 Mercury Classic Fifty 45hp Timing Screws Identification

    Oops duplicated post deleted
  17. jimmbo

    1989 Mercury Classic Fifty 45hp Timing Screws Identification

    On these engines, there is NO Idle Timing Spec, as the Timing is retarded to what ever it needs to be to get the correct Idle Speed. The Carbs are fully closed at Idle, and in most cases barley open until all the WOT Timing has happened. Pickup Timing refers to where the Timing has to be when...
  18. jimmbo

    1972 Merc 650E 3 CYL....fuel system Qs

    The number of Filters could be part of the Problem. Try removing the filters from the equation, Fuel Lines can break down internally act as Check Valves and Restrictionn. The bulb gets firm, when the Bowls fill up and the inlet valve(s) close. Sometimes, the valves can be forced off the Seats by...
  19. jimmbo

    1989 Mercury Classic Fifty 45hp Timing Screws Identification

    Have you got a Good(Factory) Service Manual?
  20. jimmbo

    Mercruiser 5.7 wanting to stall at idle after driving around

    It shouldn't be dripping like that. Is the Timing set correctly? If the timing is retarded, the throttle will have to be opened more to get the idle speed up, and the increased Airflow can result in the Nozzles feeding fuel. The little Clip you tossed, is there to lift the Needle Valve off the...
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