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TOPIC: 87 Mariner 115hp ADI launched

87 Mariner 115hp ADI launched 13 years 11 months ago #3456

  • billr
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I just launched my rebuilt Mariner.
Ran excellent, although I need to tweak the idle up a bit for next breakin run. Put about 12 gallons of 25:1 through her, first 10 below 3500rpm.

Does anyone have any experience with the Merc or Mariner 71 cubic inch loop charged triple, in 70/75/80 or 90hp?
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Re: 87 Mariner 115hp ADI launched 13 years 11 months ago #3462

Those triples have an oil injection system and it is driven by a plastic gear on the crankshaft. There have been failures.--Early ones also had different pistons (upper guided vs crank guided rods )If you get a later one mix at 50:1

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Re: 87 Mariner 115hp ADI launched 13 years 11 months ago #3491

Professor,
Do you know whether or not those triples shared the same thermostat generated problem of sleeves slipping that the same era L-4 100-115 suffered from unless retro-fitted with a 120 thermostat?
Thom

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Re: 87 Mariner 115hp ADI launched 13 years 11 months ago #3506

The 4 cylinder is really the same as the 3 cylinder as far as construction is concerned ( one more identical cylinder ).
As for the sleeve " slipping " I do not have any experience in that area.

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