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  1. Fishermark

    oil pan gasket

    I'm working on another project... (gotta do something to keep busy and out of trouble. :D) Anyway, it is a Mercruiser 1978 165 - straight six. I am waiting for the block to come back from the machine shop. I have a new gasket set and I wonder about the oil pan gasket. I love the new one...
  2. Fishermark

    Another "interchangeability" question

    Well, I have a new project I am working on. I am working on an 18' Sportcraft bowrider. It is a 1989 boat I believe. It came with a 3 liter Mercruiser and an alpha outdrive. I also have a complete setup from an old boat - a Mercruiser 165 (straight six) with a pre-alpha outdrive. Complete...
  3. Fishermark

    Impeller failure on Mercruiser

    Just a "heads up" to everyone to keep an eye on their engine temps! I replaced the impeller on my engine mounted raw water pump back at the beginning of the summer. I started the engine yesterday on muffs and after running a few minutes checked the manifolds and risers. They were too hot to...
  4. Fishermark

    Puzzling problem - Mercruiser straight six

    Sorry in advance for the long post... Hang in there to the end and see if you can give me any direction! :( My dad called me this morning with a problem he was having on his boat. First a little background.... This is an early 70's 165 Mercruiser - straight six with an aftermarket alpha...
  5. Fishermark

    Help with Mecruiser diagnosis

    Sorry in advance for the long post, but here goes? I took the boat out for a spin yesterday afternoon - 1988 24? Sportcraft with a 2003 Mercruiser 5.7 crate engine and Alpha clone (SE106) outdrive. The engine serial number is OM657558. Cruised at around 3200 rpms for 10 miles or so, as I...
  6. Fishermark

    Carbs interchangeable?

    If a boat (1987 Mercruiser 4.3L w/ electric choke) has a 2 barrel Mercarb on it, can it be replaced with a 2 barrel Rochester instead? And yes, I am talking about the marine variety. I know both are common to find on boats and are very similar, just wanted to know if they are easy to swap out...
  7. Fishermark

    Removing OMC outdrive

    I need your help! I am parting out an old boat which has an OMC electric shift 800 series stringer drive. (I thought briefly of trying to restore it, then my sanity kicked in :) ) It's actually kind of a shame, since the hull is sold as a rock and is a nice design for offshore stuff. It is a...
  8. Fishermark

    Unusual water leak

    My dad just bought and installed a new SEI outdrive for his 1971 Searay. The boat has the inline 6 165 which I rebuilt for him - (and is working great! Thanks for asking ;) ) The transom assembly is a Model 1 type and the old outdrive was giving him problems, so he bought the new complete...
  9. Fishermark

    A few before and after pictures

    Well, for those who have been following my project boat and helping with a few problems along the way... we finished the engine work a few weeks ago and got some items installed.... went for the shake down cruise yesterday and she fired up and ran great! (Boat is a 1972 Sea Ray with a...
  10. Fishermark

    What does this part seal???

    I am about to reassemble the lower unit to the upper unit on my model 1 Mercruiser. (This is after replacing the water pump assembly). I notice that there is no seal noted in the picture below - where the drive shaft mates with the upper unit. I do believe there is supposed to be a seal...
  11. Fishermark

    Pulling hinge pins - Mercruiser model 1

    I will need to pull the hinge pins on my Mercruiser model 1 outdrive. The manual simply says, "Remove hinge pin lock screws or pins and remove hinge pins with Hinge Pin Puller..." How specifically do you remove the lock screws or pins? Which do I have? Here's a pic: I'll be asking more...
  12. Fishermark

    Tapping Bell Housing for shift cable

    On the project boat I am working on... 1972 Sea Ray with Mercruiser 165 and Model 1 outdrive. I will be putting a new shift cable on soon. I believe the cable on the outdrive now is the old style that is threaded on from the inside. I know the new cables thread in from the outside and it is...
  13. Fishermark

    upgrade /swap trim system - Mercruiser

    I currently have the old Mercruiser trim system on the boat I am working on - 1972 Sea Ray. It has the separate reverse lock out mechanism. (It's pictured below). The outdrive is a model 1. (I believe - I know it predates the Alpha, and has the eye hook in the top). If I decide to replace...
  14. Fishermark

    Fuel pump and carb questions

    Engine serial number: 2917271 Mercruiser 165 I installed a new fuel pump and had the carb professionally rebuilt. I have a few questions as to what goes where?. I know the lower barb fitting on the fuel pump takes a clear hose that runs to the carb, but here are my questions: 1. Regarding...
  15. Fishermark

    trim pump question

    On the project boat I am working on?. (An early 70?s vintage SeaRay with a Mercruiser inline 6 and pre-alpha outdrive). Taking a break from the engine work - (waiting for a new coupler to arrive). Decided to work on the trim and tilt mechanism. After wiring it up and topping it off with...
  16. Fishermark

    Fuel tank install questions

    I am working on a project boat - a 19' SeaRay with a Mercruiser I/O. Here's the boat: I am getting ready to install the fuel tank. It apparently originally came with a bow tank, but had no tank at all when we bought it. I ordered this one as a replacement: Here's the bow where the tank...
  17. Fishermark

    Pre Alpha transom seal

    Setting the engine aside on this project we are working on... I turn my attention to the transom assembly. We are putting on a good used assembly and, while I have replaced a couple of Alpha units, and am familiar with the big o-ring type of seal, this is my first install of a pre-alpha seal...
  18. Fishermark

    Mercruiser inline six manifold modification question

    achris posted awhile back about modifying the inline six exhaust manifolds to help avoid cracking. Since I am putting on a new manifold and riser on my dad's Mercruiser 165, I wanted to make sure I understood the procedure correctly. (Here's a link to the original post: manifold water...
  19. Fishermark

    spark plug help with new head

    The head I received for the engine rebuild (early 70's vintage Mercruiser 165 - Chevy inline six 250) is different than the one I took off. The new head has provisions for smog control (pipe plugs covering exhaust port area) and a hole for an in-head temp sender - which I have plugged with a...
  20. Fishermark

    pics and progress on engine rebuild

    Well, since I posted a few questions on this engine rebuild, thought I would post a few pictures of the progress made so far. (This is an early 70's vintage Mercruiser 165 - or Chevy 250, take your pick! ;) ) It was pretty well rusted up and seized when we bought the boat. Here's a "before"...
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