Merc Sportjet 120 swapout for 175

[a44yroldkid]

I have a 1997 Bayliner Jazz with the 120 HP Mercury Sportjet. First let me say the engine runs fine and is amost new. It is, however, somewhat underpowered for two adults pulling a big teenager skiing. I have had several other boats with V8 inboard / outboards and wouldnt trade my little Jazz for any of them. I have searched for information on increasing the output of the 120 and cant find anything of a bolt on nature. I wish now I had opted for the 175 HP version of the Jazz when I bought mine. Sine there was a 175 HP Jazz offered the same year wouldnt it be a bolt in replacement.Did they use a different jet? The only difference I have been able to find is the 175 versions had a larger oil resevoir.<br />I would appreciate it. I should be able to buy the complete motor and jet from the factory and simply bolt it all in right? Any information would be greatly appreciated.<br /><br />Thanks in advance,<br /><br />Mark

 

[hondon]

Re: Merc Sportjet 120 swapout for 175

It woulld not be a direct swap as the 175 is a Merc based V6 and the 120 is a Force L 4.As for ease of conversion, why not just call Bayliner and ask.Merc consumer line can also help you.