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  1. 1lastweekend

    Prestolite trim pump...Before I disassemble, any advice?

    I have a 1981 Rinker V170 with the Mercruiser 120/2.5L motor. For the last year, the lower unit will drift down to the full down position within a few minutes of being raised. This boat has the Prestolite trim pump in it. I have checked the trim rams, lines and pump, does not appear to be...
  2. 1lastweekend

    Mercruiser throttle/shift control hard to get into neutral...

    I have a 1981 Rinker 17ft witha Mercruiser 120HP I/O. Lately, when I am shifting into neutral from either forward or reverse, the shifter seems to have a hard time "finding" neutral. Sometimes I have to shift from forward past neutral into reverse, and then back into neutral to get it into...
  3. 1lastweekend

    Correct connections for Pertronix Flamethrower coil?

    Hi I am working on installing a Pertronix 40611 3.0 ohm epoxy coil for my 1981 Mercruiser 2.5L engine, s/n 5907433. From what I have read on various forums, my OEM coil was a 1.5 ohm, but there's a simple wire swap to allow the Pertronix to function correctly. I disconnected the purple/yellow...
  4. 1lastweekend

    Johnson 4.5HP- double check model year and water flow...

    Considering purchasing a Johnson 4.5HP, saw it run today and it seemed to run fine...The question is do I have the right year of the motor? The model # is J5RCSS, which should mean Johnson 5hp, rope start, and CS equals model year 1980 I believe. The designation for shaft length is a blank for...
  5. 1lastweekend

    Water leaking down shift shaft/housing 1981 9.9HP Evinrude

    I just bought a 1981 Evinrude 9.9HP from a friend and it wasn't pumping much water, so I changed the impeller and water pump assy. After reassembling it, I tank tested the motor and I have great water flow, but I noticed water was flowing down the housing where the shift shaft is located. I...
  6. 1lastweekend

    Mysterious engine performance drop...

    I have a 1981 MC 120 HP 2.5L engine on a 17' Rinker bowrider. This spring I noticed a large crack on the exhaust manifold leaking water, so I replaced it with a new OEM manifold. After the repair the engine ran great on muffs, and when I put the boat into my slip 3 weeks ago I took it for a...
  7. 1lastweekend

    Replacement parts for my shifter?

    Can anyone recommend a good place to get hard to find or NOS replacement parts online? I have a 1981 Rinker with the Mercruiser 120HP pre-Alpha, and while replacing the interior of the boat this winter I broke the shifter bezel. I have looked all over the net and have not found anything close to...
  8. 1lastweekend

    Understanding Mercruiser part numbers...Replacement exhaust manifold?

    Hi, I have a 1981 Rinker V170 with the 120HP Mercruiser 2.5L GM engine. Last fall while winterizing the boat I noticed water running down the exhaust side of the block, and immediately thought oh crap the block is cracked. I completed the winterization, but not before running the motor for an...
  9. 1lastweekend

    1981 Rinker V170 I/O interior sidewall rebuild- any advice?

    This fall I decided to replace the worn interior of my 81 Rinker. I removed the seats and some of the carpet and then removed the interior vinyl/plywood sidewalls to make templates for the new pieces. I found some rotten wood under the fiberglass sidewall structures (not sure what the right...
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