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  1. 02-09-2020, 04:45 PM #1
    tcesni
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    What is the proper torque for engine mounting bolts?

    90 hp Optimax mounted to a Ranger RT188, how much torque should be used on the mounting bolts?
    2018 Ranger RT188 SC Black/115 hp Yamaha SHO 4-stroke; Garmin LVS34 - north
    2018 Ranger RT188 DC Black/115 hp Merc Pro XS 4-stroke; Garmin LVS34 - south
    14' Mirrorcraft tin boat (ancient) with a 9.9 Mercury 4-stroke, no electronics; catches fish anyway
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  2. EuropeanAM
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    #2 02-09-2020, 06:10 PM
    Engine to Transom: 55 lbs/ft.

    Engine to JACKPLATE: 90 lbs/ft.


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  3. tcesni
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    #3 02-09-2020, 06:58 PM
    Thanks, surprised it’s not more so I’m glad I asked.
    2018 Ranger RT188 SC Black/115 hp Yamaha SHO 4-stroke; Garmin LVS34 - north
    2018 Ranger RT188 DC Black/115 hp Merc Pro XS 4-stroke; Garmin LVS34 - south
    14' Mirrorcraft tin boat (ancient) with a 9.9 Mercury 4-stroke, no electronics; catches fish anyway
    Reply With Quote Reply With Quote
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