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  1. Horigan

    Volvo Penta 7.4 overheats

    That is a mystery. I would pull the drive and determine where the blockage is by repeating the water flow tests you've been doing. With the muffs on, does the water flow out the drive? If so, then try to seal the end of the hose to the transom side of the drive to see if water gets to the raw...
  2. Horigan

    Adding dedicated battery for depth finder

    I suspect he means a LiFePO4 battery, which are safe for boats. They don't need venting, but the above points are valid. A depth finder wouldn't be a big draw on the main battery.
  3. Horigan

    Volvo Penta md5a fuel not reaching engine after filter change

    During future filter changes or fuel system maintenance just be sure to complete the bleedd/vent procedure in the manual. If bled correctly at the filter housing, the risk of introducing air to the injector pump is low. On first start up after a filter change/maintenance, be ready to give it...
  4. Horigan

    Will vehicle work?

    You will be over capacity when you add the trailer and the gear and fluids to the boat, plus you'll likely exceed the tongue weight limit also. Yes, you'll be able to pull it out of the water at the ramp, but it doesn't have the cooling system and power to tow any real distance.
  5. Horigan

    Volvo Penta Trim Gauge

    First I would check the connections between the sender and the gauge to make sure they are clean and solid. Typically there is a connection at the back of the engine where the sender wires connect to the boat wiring, and the connection at the back of the gauge. If those are good I would...
  6. Horigan

    Volvo Penta md5a fuel not reaching engine after filter change

    I think the key concern is pre-filling a secondary filter on a diesel. Particles you can't see can clog the injectors. If there is only one filter in the system, I would fill it via the lift pump lever and not pre-fill. An alternative is to fill the secondary filter through the inlet ports...
  7. Horigan

    Impeller

    Looks fine, though I would clean up the surfaces that the seal contacts on both the housing and the cover. May want to pull the impeller to clean the housing. Compressing the impeller with a zip tie is an easy way to install it.
  8. Horigan

    Volvo Penta md5a 1982 diesel Delphi 296 replacement

    To properly bleed a diesel fuel system you need to completely fill the filter bowl. Then find the downstream lift pump and there should be a small lever on it. There should also be a bleed valve on top of the lift pump. Crack the bleed valve and pump the lever many times until you get a...
  9. Horigan

    290 DP Prop Cone/Nut Torque

    I've been noddling how I'm going to drill out the center of this broken center bolt with a left hand drill bit and I discovered a cool tool to keep the drill centered, a hinged sighting drill. The end of the prop shaft has an internal taper, so this should work pretty well. Thought I'd share...
  10. Horigan

    Maybe my turn for new boat time

    Plenty of cup holders though. I wish I had one!
  11. Horigan

    Overheating at 30mph

    Have you checked the water inlet on the drive, item #9 in post #7? If that's cracked that can lead to your symptoms.
  12. Horigan

    290 DP Prop Cone/Nut Torque

    Yeah, I think I didn't have the shaft cleaned enough when I lost the prop and thus tightened against some crud. Thanks for the insight and detailed procedure. I'll find a longer large rod or screw driver so I can attain a higher torque on the cone.
  13. Horigan

    290 DP Prop Cone/Nut Torque

    Good idea. I was thinking a thread lock, but not sure about underwater use.
  14. Horigan

    290 DP Prop Cone/Nut Torque

    Thanks. Good idea on the socket. I intend to use a left hand drill. I'm hoping it comes out easily when I haul the boat out this spring...
  15. Horigan

    290 DP Prop Cone/Nut Torque

    I had an issue earlier this year where I lost a rear prop on one of my 290 DP drives due to apparent insufficient torque on the prop cone and center bolt. I had used a Volvo prop removal/install tool and thought I had pretty good torque on the cone and center bolt. I acquired another rear prop...
  16. Horigan

    Jack up the bow while boat is on the trailer ...

    Just jacking it up should be fine. If you're concerned about overloading the rear axle, just put a piece of 3/4" plywood under the front wheels. If you know trigonometry, you can calculate the exact thickness you need.
  17. Horigan

    Draining the engine

    Not necessarily. The water jacket in a block typically just surrounds the cylinders and doesn't need to go below them. My drain is well above the oil pan. I recently had to search hard for the drains on my Volvo diesel engines and was surprised how high they were.
  18. Horigan

    Glastron SX 175 Gas Smell

    I would not put a sealant on the gasket. The gasket should be made of rubber and should seal well if the surfaces are clean and smooth. You don't know how the sealant will react with gasoline.
  19. Horigan

    Glastron SX 175 Gas Smell

    Yep. I greatly reduced my mild gas smell by replacing the hoses. I wish my sender gasket was as accessible as on this boat.
  20. Horigan

    Oil Change and Gear Oil Change issue . Can you help ?

    Just to keep things confusing, realize that the Cobra SX drive (Volvo joint venture) gets filled from the bottom.
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