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Thread: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

  1. #256

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    the 115 is a higher revving engine(400rpm more), and so has a different ratio gearbox. not sure prop selection will counter that!

    Full Throttle RPM Range 75/90 HP - 5000-6000115HP - 5800-6400

    Gear Ratio 75/90 HP - 2.33:1115 HP - 2.07:1

  2. #257

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    I read a post by someone who had it done and said there speed increased noticeably they had posted results but i forget the numbers something like six mph gain at a low trolling speed, scream and fly in the US sell a programmer for $1300 USD a bit pricey but if i will be paying someone local the same price just to do a remap it might be worth buying i can sell the programmer on to someone else and recoup some money once the remapping is done

  3. #258

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Just realized i bought the 115hp power head for my 90hp, the 115hp has different cam shafts so if i remap where would i be?

  4. #259

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    it will be an interesting combination, not sure how they would re map it, being 90hp gearing and 115 cams. if the ecu still works, it might be a good idea to wait and see how how the power/torque curve is first?
    Or maybe you could put the 90hp cams back in?

  5. #260

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Yeah I'm not sure about the combination i don't want to run the powrhead lean on the 90 settings with the 115 cams i will swap the cams over

  6. #261

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    If you swap the cam over be careful removing and installing, it is very easy to break the camshaft, which will not be good.

  7. #262

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Not required
    Last edited by OrangeJaybird; 29-01-2019 at 08:28 PM. Reason: Quotes old message

  8. #263

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Not required

  9. #264

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Yeah i have never done a vertical cam i have done all horizontal cams i think the only worry will be getting the right clearance from a lobe to cam cap or however Mercury do measure the clearance also noticed these engines use buckets and shims so i will need to keep the shims in order for recalculating new shims if they are any different from different cams

  10. #265

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Forgot to add just arranging shipping now should cost just over $200 in shipping not cheap but it was the cheapest i found still ok tho $1200 powerhead i'm absolutly chearin

  11. #266

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    have you tried to source a second hand ECU, that would be the best outcome if its cheap enough!

  12. #267

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    in a car engine you replace bearings when replacing cams also lifters
    i play with mainly older engines with solid lifters and pushrods though

  13. #268

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Yeah i have Ericcs to hard to come by either i'll use my ECU if it still works or i will buy a new one from the US they are under US$500 or i can get mine repaired for US$130 but they don't replace the casing they only do chip work

  14. #269

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Well, i guess you can try and get it going with the 115 cams and the 90 ecu first. if the ecu is still in working order, then decide to either swap out the cams, or get the 115 ecu. i know what i'd rather have!

  15. #270

    Re: E-Tec, Optimax, 4 Stroke? Looking at 115hp range

    Quote Originally Posted by stevej View Post
    in a car engine you replace bearings when replacing cams also lifters
    i play with mainly older engines with solid lifters and pushrods though
    If i swap the cams and the old bearings have no wear they'll be going into the new head too

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