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  1. jimmbo

    1983 Mercury 150 Vibration and Noise

    All the wires to and from the Switchboxs didn't get scrambled when you were making other changes to the Ignition system? Do another Compression Test. I think 84 was the first yr where the Engine mixed the Oil into the Gas, so I hope you were running Premix
  2. jimmbo

    Late 70's to Late 80's - Worth shopping for?

    The 115 FICHT wasn't as High Risk as the 1997, 98, and 99 150/175 FICHTs
  3. jimmbo

    Late 70's to Late 80's - Worth shopping for?

    In 1978 and 79, OMC had 99 cubic inch 85, 100, 115, and 140 V4 Motors. In 1980 thru 1984, they were 90, 115, and 140 Motors. In 1985, the V4 Loopers were introduced, these V4 were called 120 and 140hp, the 99in Crossflow V4s were 90, 115hp. As the 80s went along, theses engines were also called...
  4. jimmbo

    Used or reman outboard

    In the Late 70s through into the 80s there were 3 inline 6s, a 90, a 115, and a 140. Although all of them were the same Displacement, and shared a few Parts like the Crankshaft,, there were many differences, Porting and Port Timing was different, in some cases there were what was called Power...
  5. jimmbo

    1988 125 HP Force Rebuild

    I wouldn't try to rebalance it, I would replace it
  6. jimmbo

    Used or reman outboard

    Some People, including some Mechanics, think every I6, or V4 Powerhead is Identical, despite there being a 50hp difference. After all, in their Eyes, it is just a difference in the Jets in the Carbs.
  7. jimmbo

    Johnson won't start

    When You said only a few Ounces drained out, but no Water, I thought I should ask, in case you had tried filling it from the Top. I still find it odd that no Water was in the Case. This is going to sound Pessimistic, while I like saving money by sourcing Parts myself, letting the Person doing...
  8. jimmbo

    Johnson won't start

    The last time you put Oil in Gearcase, how did you fill it?
  9. jimmbo

    1988 125 HP Force Rebuild

    After 7 years that Impeller is past its Best Before Date.
  10. jimmbo

    cooking

    Pork, Nature's Perfect Food
  11. jimmbo

    How to run twin 5.0s from portable outboard tanks

    I know my 5.7 Volvo Penta, can go thru 33 Gallons(us), in 90 minutes at WOT, so a 6 gallon potable tank would last about 16 1/2 minutes
  12. jimmbo

    1994 Johnson 60hp (J60TTLERS) - Rough Idle & Milky Plugs on All 3 Cylinders

    Is the Cooling System working Properly? Low Engine Temp, especially at Idle, can keep Water(a Product of burning Fossil Fuels) from Boiling off. Check Thermostat for proper Operation, as well as the Poppet Valve, for deterioration, and a weak Spring
  13. jimmbo

    Left side lean?

    Does the List increase as Speed goes up? Run a Straightedge on the Starboard side of Hull from the Transom forward, and look for any gap forming. I am suspecting that the Stringers have rotted out at the back allow the Hull to flex, creating a Hook. It is a 23 yr old boat, and I suspect your...
  14. jimmbo

    Prop questions

    Going from 4600 to 5500 is going to require quite a drop in Pitch, about 4 inches. I would make sure the Motor is performing at its Best too. Compression, Is the Timing Advancing fully, are the Carbs opening fully too Also is the Tach set correctly, and is it accurate? Is the Boat loaded evenly...
  15. jimmbo

    correct carb for ‘94 434A?

    The Holley 80552 is a Holley Aftermarket Marine Carb for replacing a Q-Jet. It came from Holley with what Holley called a Universal Marine Calibration. I have this same Carb. I had put it on my VP 5.7 back in 2007 for a few weeks. It ran fine with no issues, though I thought the Secondaries...
  16. jimmbo

    Engine stalling when you give it too much throttle on take off

    When you say "give it too much Throttle from a standstill", does that refer to how quickly you give it Throttle, or how much Throttle you give it? Does the Stall happen the moment the extra Throttle is given, or a few seconds later? When you "replaced the factory Ignition System", what parts...
  17. jimmbo

    Mercury 850 85hp. Good engine or stay away?

    Looking at the Cowl, that is a 1975 motor
  18. jimmbo

    115 6c TOP piston cylinder issue

    I doubt any Machinist would Hone a Cylinder out to 0.015 Oversize. It would take forever. 0.015 is the first Overbore Size. 2 Stroke Engines tend to have a unique Wear Pattern
  19. jimmbo

    115 6c TOP piston cylinder issue

    So you are saying only 2 Pistons need replacing? You can use the 2 Ring Piston as a Replacement Finding Rings for the 3 Ring Pistons might a Challenge, there are 1 set of 3 Rings here You might try calling Dealers in your area, as they may have a few NOS collecting Dust
  20. jimmbo

    1986 Mercury 9.8 110 outboard

    Oily walls would likely indicate that Gas and Oil were getting into the Crankcase, or someone had poured a bunch of Oil into the Cylinders. If they are broken, or stuck either of those would make them unable to seal. However, a badly scored Cylinder Wall could also do the same You say it was...
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