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  1. Bigjohn1

    Let's talk the Merc 115efi vs F115

    This is NOT about the current L4NA Verado-based 115efi. I am talking about the previous version, sometimes referred to by the nickname "Mercaha": We already know the powerhead is Yamaha and the lower unit is Merc. Aside from those differences, is the powerhead, fuel system, heads, valve train...
  2. Bigjohn1

    Significant prop end play - Flo-Torq III hub

    I have a Flo-Torq III hub on my Merc 115efi with a Mercury ss prop. Everything was properly installed and correctly torqued to specs (100lbft). The torq was re-checked after the first run also. The Delrin sleeve is not installed backwards and the correct thrust washer was used (the one that came...
  3. Bigjohn1

    Wahoo fishing

    Post your success with Wahoo here. What are your best lures, time of day, trolling techniques etc. For me, Braid Marauder, Yozuri Bonita, and Ballyhood.com's Wahoo Wacko trolled right in the prop wash at the crack of dawn. If I can't make it out that early, I make sure I will be out during the...
  4. Bigjohn1

    Thoughts on Stiletto Bay Pro I 4-blade

    Mercury 115 efi 4-stroke (2-07:1 gearing) Can anyone give me feedback on the Stiletto Bay Pro I 4-blade ss props? I am now running a 17P Merc Trophy Plus which has been retrofitted with a Flo-Torq III hub kit. I like the way this hub helps with the shift clunk and prop rattle my engine is...
  5. Bigjohn1

    Cost of gear ratio change?

    Any techs out there familiar with gearcase repairs, I would appreciate some technical feedback. Let?s say I wanted to change the gear ratio of my 115efi 4-stroke from its stock ratio of 2:07-1 to the 2:33-1. I know this requires a new forward gear with a price tag of about $350. My question is...
  6. Bigjohn1

    Life of timing belts

    Just throwing a question out - how many years/hours are people getting on their 4-stroke timing belts? Factory manuals are generally stating to check every few hundred hours (300 isn't it?). Mine is 3 years old with 550 hours and no signs of fatigue, oil contamination, or the like (04 115efi)...
  7. Bigjohn1

    Saltwater Proof Trailer Light Install

    Looking for those with trailer wiring experience. I have replaced my lights too many times (both incandescent and LED) after saltwater eventually trashed them. I am installing PVC guides on my trailer and will mount a new set of LED?s atop these guides where they never touch the water. I will...
  8. Bigjohn1

    Any 90hp Mercury 4-stroke owners?

    I am speaking of the pre-efi models with Yamaha powerheads running carbs. I think this includes model years 2000-2005 even though Merc discontinued the use of model years last year. If you own one of these models, how has it performed and have you had any carb problems with yours?
  9. Bigjohn1

    17P TROPHY PLUS TOO MUCH PITCH

    Boat: 17' center console heavily loaded and always used with bimini top up Outboard: Merc 115efi 4-stroke ('04) Gearing: 2:07-1 Current prop: Trophy Plus 17P Current max rpm: 5,300 Since I low-speed ocean troll alot, a 4-blade works better for me since it keeps the boat speed constant...
  10. Bigjohn1

    Shift clunk and Flo-Torque hubs

    I have an '04 Merc 115efi 4-stroke running a a Trophy Plus 4-blade prop. The loud clunking noise when going into gear is enough to make me want to switch back to an aluminum prop:^ I am using the Flo-Torque II hub but have been advised that switching to the later Flo-Torque III will quiet the...
  11. Bigjohn1

    Merc 115efi over-charging battery

    Engine: 2004 Merc 115efi. <br />Problem: Suspect regulator is allowing alternator to over-charge battery.<br /><br />300 hours of flawless running. Only problem has been regulator is allowing between 15.3-15.8 of charging voltage. While this is within factory specs, it is causing me have to...
  12. Bigjohn1

    Merc 60 4-stroke efi is a Yamaha?

    Is a new Mercury 60efi 4-stroke a Yamaha powerhead like the 90/115 are? Does this engine contain electric fuel pumps (high and low pressure) just like the 90/115 efi? I ask as I know a person who is going through what we think is a fuel delivery problem on his new Merc 60efi (4-stroke) and I am...
  13. Bigjohn1

    2004 Merc 115efi

    I have the above outboard and have logged over 200 trouble-free hours of use this past year as the primary power on a single engine center console. I am pleased so far with its performance and reliability and I perform my own maintenance at the factory specified interval. I am interested in...
  14. Bigjohn1

    any special precautions for de-carbing an efi?

    I am ready to perform the first de-carb of my 2004 115efi which now has 180 hours on it. The engine sees 95% of its use trolling at no more than 2,500 rpm's. The engine is still under warranty and the manual states that Power Tune should be used for de-carb. I have used this product for years on...
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