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  1. Old Yeller Boater

    Mercruiser 3.7 Head Gasket Replacement

    guys....I think I already know the answer to this, but want to confirm the gaskets I'll need to pull the head and put things back together. I can get a " Victor Reinz Engine Kit Gasket Set" which includes the head gasket plus intake, exhaust, carb and etc gaskets. What's your thoughts on the...
  2. Old Yeller Boater

    Larson with Leak into Bilge

    Reposting this from the mercruiser I/O section: I've posted some other threads with fixes that are needed to my new-to-me Larson. To recap, it appears I have a blown head on my 3.7 merc. I've also got a leak into the bilge that is a fairly good flow even when the boat is just sitting in the...
  3. Old Yeller Boater

    Larson with Leak Into Bilge

    I've posted some other threads with fixes that are needed to my new-to-me Larson. To recap, it appears I have a blown head on my 3.7 merc. I've also got a leak into the bilge that is a fairly good flow even when the boat is just sitting in the water. It's more of a flow when wakes are hitting...
  4. Old Yeller Boater

    Mercruiser 3.7 Thermostat Question

    I ordered a sierra 18-3667 replacement thermostat for my 3.7 merc. This is a dumb question, but I just want to be double sure. Which way does the spring side go? Toward the exhaust manifold, or toward the hose? thanks!
  5. Old Yeller Boater

    Mercruiser 3.7 Overheating Troubleshooting

    I've got an overheating problem with my 3.7. Last fall the outdrive impeller was replaced as the old one had the ends broken off. Loose pieces were recovered from the heat exchanger, but no guarentee that it's all of them. Blowing air through the system seems to be good, and I've removed the...
  6. Old Yeller Boater

    temp sensor question

    I checked my sensor with a multimeter. With engine running, the number started over 2.0 but gradually dropped to about 1.3 as the motor warmed up. When checking, I put one lead on the end of the sensor, and the other lead grounded to the block. Should I have checked it with the lead on the...
  7. Old Yeller Boater

    Mercruiser 3.7 Starter Needed

    The parts sites I've looked at list the starter for my boat as obsolete. Anyone have a source for one? it's a 1987 Mercruiser 3.7L i4 motor. thanks.
  8. Old Yeller Boater

    Just bought 1987 Larson DC-190

    Sold my 1987 Sunbird Corsair and bought a Larson off of my sister-in-law. I didn't get a great deal as far as price and book value go, but I did get a boat that I know the complete history on. I'm the third owner. Original owner owned the boat for about 18 years, always stored it inside and...
  9. Old Yeller Boater

    floating dock question

    I'm building a floating dock for my lakefront lot. It is an 8x10 floater made of pressure treated wood. 2x10 sides and joists and 2x6 decking. I've calculated the weight of materials to be 1400 pounds (this is a conservative estimate, because weight is 1225 for the wood and other materials...
  10. Old Yeller Boater

    Larson with I-6 and mercruiser outdrive overheating problem

    Folks, I've done some searches and not finding the details I'm trying to find, so thought I'd post some details here and perhaps you can point me to pertinent information. my sister-in-law has a 1985 Larson, 19 ft. it has a i-6 motor and mercruiser outdrive. I'm not exactly sure what the...
  11. Old Yeller Boater

    OMC 3.0 Liter Prop Pitch Suggestions

    I'm very new to boating, so please don't flame me. I'm having some difficulty finding good basic information on prop sizes and pitches for my application. Hopefully you guys can give me some suggestions of props or perhaps locations where I can find some good information for my situation. I...
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