rookie needs help

[Biskitboy]

Hi ,
Ive got a 87 or 88 mariner 115 inline 6 that I just rebuilt carbs on. serial number is OB350689. This motor does not have a dist, it has 2 switch boxes. Can someone give me the timing specs for this so I can do a link and sync. Dumb question but should the trigger for max advance go alway to stop when throttle is opened without the motor started, mine does not didn't know if that is normal or not? Also need octane and oil recommendations.
Thanks a lot

[Dave Strong]

You need a manual and follow the entire procedure for the link and sync, way more to it that hanging a timing light on it and checking.

Dave

[SS170]

Burn at least 91 octane, ethanol free if possible. I run a little fat on oil-a couple extra oz.per 6 gal. Make sure your water pump impeller is good, the top cylinder needs water. I backed my max timing off a couple degrees just to be safe. Do not lug your motor with too big a prop, they like to spin. Like Dave said ... get a manual.

[Biskitboy]

Serial number is OB 357903 what manual do I need and where is the best place to get them? Are you talking clymers or a factory manual?

[kellytheaker]

stay on this and see if someone will send you a page of manual for the linc and sync . and possibly walk you through the process for timing . Hopefully soon for you -

[Merc 2.5]

Serial number is OB 357903 what manual do I need and where is the best place to get them? Are you talking clymers or a factory manual?

Get the merc , clymers and such can give false info

[vtboy]

Only use MERCURY MANUALS just my thought

Get the merc , clymers and such can give false info

[Merc 2.5]

Only use MERCURY MANUALS just my thought

Ya same thing I said. the rest have gave false info on things , I've experienced. They r more expensive tho but u can fix anything on ur motrin with it. Good luck

[wogi]

Only use MERCURY MANUALS just my thought

[wogi]

Burn at least 91 octane, ethanol free if possible. I run a little fat on oil-a couple extra oz.per 6 gal. Make sure your water pump impeller is good, the top cylinder needs water. I backed my max timing off a couple degrees just to be safe. Do not lug your motor with too big a prop, they like to spin. Like Dave said ... get a manual.

Good advice IMO

[rhardwick]

I buy a lot of OEM Mercury factory service manuals on eBay. As others have said stay away from the aftermarket manuals.

Also if you can get 100LL aviation fuel that engine will run forever. The Merc inlines love av gas!

[vtboy]

I LOVE THE SMELL of race fuel , 2 stroke SECOND, NOTHING like Nitro RUN THE BEST you can afford its only your engine

I buy a lot of OEM Mercury factory service manuals on eBay. As others have said stay away from the aftermarket manuals.

Also if you can get 100LL aviation fuel that engine will run forever. The Merc inlines love av gas!