juiced up 115 merc??

[yoder]

can you change the jets and idler arm to get more hp from this motor..like you can on some other outboards??

 

[dpfrost]

Re: juiced up 115 merc??

hey omek i have a 135 merc and changed the jets out from a 150. Gave me alittle more speed. I am not sure about a 115 though.

 

[Texasmark]

Re: juiced up 115 merc??

Once upon a time the 99 cu in sported 150 hp.....right before the V6 intrusion. Now a lot of folks will talk about porting changes and this and that, but I'd bet the main difference was carbs, and or just larger jets.....but what do I know.<br />The way to really know is to get a parts manual and compare part numbers for the different parts of several engines.<br /><br />Mark

 

[yoder]

Re: juiced up 115 merc??

thanks frost i know you change a 120 nissan(spellling)? to a 140 just by jets and idler arm ..texas that sounds good think i will do that first..

 

[Chris1956]

Re: juiced up 115 merc??

Guys, The inline 150HP had pistons with a power port, that the 115HP motors do not. Also, when comparing parts, start with the transfer covers. I would bet the 150HP transfer covers(and therefore the porting) are a bit different than the 115HP transfer covers.

 

[Texasmark]

Re: juiced up 115 merc??

Hey Chris,<br /><br />Are you talking about "Direct Charge"? Hence the power port? Well my '89 115 was Direct Charged.<br /><br />Mark