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#1
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Mercury inline 6 Performance tips
I am building a 115hp Murcury Outboard the stripes are silver and red and
says oil injected. I was curious what year this motor is. Does this powerhead have the boost ports in this year. I have two other motors. One motor is on my boat 1984 90 hp brown stripe runs but has 90 psi compression across the cylinders. and I have a good Mariner 115 hp powerhead with 145psi across the cylinders and 115 hp carbs which I was going to drop on the 90hp lowerunit. Is the lower unit have a different exhaust chamber or will the 115 hp powerhead work fine with the 90hp lower unit. If there is any one out there to give me some advice I'ld appreciate it. I have not been able to find much on porting and performance tips online. I have been building two stroke and four stroke race engines for motorcycles for 30 years. This is a fun new direction. I had a blast this summer with an 18'Chris Craft Caper with the tired 90hp. Know its time to freshen things up to make it realy fly. Thanks, caperman |
#2
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isnt your mariner a four cyl.and the 90 a 6 .im in the process of getting
115merc sounds like the one you described which is supose to be an 86. best to match the serial # to year.ive seen this on another web site.as far as the boost port this was on the150 hp |
#3
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[posted and mailed]
"caperman" wrote in lkaboutboats.com: I am building a 115hp Murcury Outboard the stripes are silver and red and says oil injected. I was curious what year this motor is. Does this powerhead have the boost ports in this year. I have two other motors. One motor is on my boat 1984 90 hp brown stripe runs but has 90 psi compression across the cylinders. and I have a good Mariner 115 hp powerhead with 145psi across the cylinders and 115 hp carbs which I was going to drop on the 90hp lowerunit. Is the lower unit have a different exhaust chamber or will the 115 hp powerhead work fine with the 90hp lower unit. If there is any one out there to give me some advice I'ld appreciate it. I have not been able to find much on porting and performance tips online. I have been building two stroke and four stroke race engines for motorcycles for 30 years. This is a fun new direction. I had a blast this summer with an 18'Chris Craft Caper with the tired 90hp. Know its time to freshen things up to make it realy fly. Thanks, caperman You're on the wrong newsgroup for an Inline Six question. There is a newsgroup totally dedicated to inline 6's care and feeding: The NNTP server is: news.kraits.org and the newsgroup is: bigweek.mercury-inlines In Outlook Express use: tools/accounts/add/news and then follow the prompts to join us there! The Cap'n |
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