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I am still looking for some feedback on re-powering my 2004 Montauk 170. I have decided on a 90HP E-Tec. My problem is trying to decide between the 90HP and the 90HP HO (high output). The 90HP is an inline 3-cylinder vrs a v 4-cylinder in the HO. The 90HP is quite a bit lighter and has an integral oil tank. The 90 HO has an external oil tank (space issue) and is heavier and larger. The 3-cyl is probably at bit rougher running than the 4-cyl. I am leaning towards the standard 3-cyl but the dealer has been really pushing the high output model. Has anyone re-powered a 170 with either the 90HP 3-cyl or the 90HP HO motor?

[Corrected Model name spelling]