mercury sport jet swap

barefoot53

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Joined
Jul 17, 2010
Messages
6
What is involved in swapping a 120 sport jet out and installing a 175 or 240? How much if any glass work has to be done to install the 175 jet housing?
 

kend301

Lieutenant Junior Grade
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Jul 4, 2009
Messages
1,005
Re: mercury sport jet swap

Well everything will fit but you are going to need all the cables , hardware and make some major mods the the engine cover , The only person I know who did this spent 5k total and boat went 52 mph and ate gas like the devil .. he sold it a year later for 4500.00 .... Your choice :D
 

barefoot53

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Joined
Jul 17, 2010
Messages
6
Re: mercury sport jet swap

Thanks for the imput. I have a sugar sand mirage w a 120 in and love it. A neighbor has a whaler with a 120 in with a burnt piston. He gave me the boat just figured Id upgrade if i was gonna do it. Doesn't sound like its worth it though. Any suggestions on a good source for a reman 120 powerhead?
 

kend301

Lieutenant Junior Grade
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Jul 4, 2009
Messages
1,005
Re: mercury sport jet swap

Invest a 1/2 hr of your time and pull the head and see how bad the block is , could be much cheaper to rebuild yourself. Post up some pics of the bad cylinder if you need help deciding .
 

barefoot53

Cadet
Joined
Jul 17, 2010
Messages
6
Re: mercury sport jet swap

will do. gotta wait til i can get the boat out of storage. thanks
 

kend301

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Joined
Jul 4, 2009
Messages
1,005
Re: mercury sport jet swap

Get going on it ASAP , I really want to see some pics of the motor as the rebuild could take some time if machine work is involved .
 

barefoot53

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Joined
Jul 17, 2010
Messages
6
Re: mercury sport jet swap

Got a quick look at the motor tonight. Im not sure what it has in it but its not a 120. Its a V motor. There isn't any cover on the flywheel or any cowlings for that part with any type of ID. Gonna go back tomorrow with a flashlite and see if I can find a serial number.
 

kend301

Lieutenant Junior Grade
Joined
Jul 4, 2009
Messages
1,005
Re: mercury sport jet swap

If it is a V motor you have a 175 . Very Lucky find . Heck if you do not want it I will drive there and pick it up :D
 

barefoot53

Cadet
Joined
Jul 17, 2010
Messages
6
Re: mercury sport jet swap

I didnt get there tonight had some bad storms. Been doind some surfing online, whats the likelyhood that it could be an OMC?
 

kend301

Lieutenant Junior Grade
Joined
Jul 4, 2009
Messages
1,005
Re: mercury sport jet swap

NONE , different crank splines , Unless he paid someone to custom machine a jet drive pinion shaft it has to be a sport jet .
 
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