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  1. HorizonblueDK

    Flywheel size on a Volvo Penta 430

    On a Volvo Penta 430 (4.3 V6), mated to a DP drive, the flywheel is 12 inch. When I had it in my hands some time ago, I forgot to look for numbers. Does anyone know if this is just a V8 flywheel ? When searching various marineshops online, only a 14" flywheel is available for the 4.3 V6 engine...
  2. HorizonblueDK

    Outdrive corrosion

    Corrosion seems to be quite "normal" on the SX drives. I sanded my SX drive down to bare aluminium and gave it one or two layers of "International gel shield" (2 part epoxy primer) and finished with two layers of "International Trilux" After two seasons(salt water), no signs of corrosion, except...
  3. HorizonblueDK

    O2 sensor in a water cooled manifold

    I have just installed an AEM wideband O2 gauge with a Bosch sensor in my car. The instructions for this, was the keep the sensor 18 inches away from the(nearest) exhaust port, and at least an angle of 12°(tip pointing downwards). Probably so moisture can drip off. When installing an O2 sensor in...
  4. HorizonblueDK

    AQ170A Run hot/overheating problem SOLVED

    Re: AQ170A Run hot/overheating problem SOLVED Interesting story. I also run one of these ancient engines, haven't had any overheating issues yet. Well on one trip, the temp suddenly went a little higher that it started out with, but the problem was sea weed in the intake..... My engine has...
  5. HorizonblueDK

    Fuel cooler for EFI engines

    Someday I will build an EFI V8 for my 18 footer. I sometimes wonder if it is really necessary to have a fuel cooler, if I made a return line to the tank. This is how I would make the system, sorry for the foreign language, but I think you get the understanding anyway. The reason for having...
  6. HorizonblueDK

    AQ170 Water in Starter? Where's it coming from?

    Re: AQ170 Water in Starter? Where's it coming from? The starter on my AQ 170 was also quite wet inside when I bought the boat. Don't know exactly where it came from, but the u-joint bellow was rotten, and the bell housing bearings were rusty, so it is probably sea water that came in that way...
  7. HorizonblueDK

    Volvo 280PT X dimension ??????

    Re: Volvo 280PT X dimension ?????? The older Aquamatic drives are meant to be well submerged, cavitation plate a little less than one inch below the keel. Here is the cutout template and dimensions.
  8. HorizonblueDK

    Chevy LS1 engine in the boat

    I have a 4.3 V6 in the Draco 1800 (18 feet). It runs fine, but I would still like to have a V8 :joyous:. But I don't want to add a heavy lump in the back of the boat, so I'm thinking about what can be done. An SBC is a heavy piece of metal. It seems like the all aluminium Chevy LS1 is the...
  9. HorizonblueDK

    How to test an ESA module without an engine ?

    I have an ESA module for a 4.3 V6 OMC Cobra that I would like to sell. I'm not going to use it ever, I think. I would like to test it, so I can prove for an interesting buyer that it works. But I don't have an engine I can put it on. Well I have a V6 engine in the Draco 1800, but that one has...
  10. HorizonblueDK

    ESA module, how does it exactly work ?

    We are talking OMC Cobra dog clutch. I know that the ESA module causes the engine to stumble, when the shift interrupt switch is activated, but exactly how does it do that? I'm asking, since a friend of mine has a 1988 Bayliner with 2 x 5.0 GM engines, where he has replaced the distributors...
  11. HorizonblueDK

    Vibration because of long exhaust pipes, part two.

    Last year I posted few pictures of my homemade exhaust system, which generated a vibration in the boat. I suspected that the length, depth and rigid construction of the pipes, caused the vibration. This is how it was made, until recently. The tape indicates where I'm about to cut. A few...
  12. HorizonblueDK

    Aluminium heads on a 350 engine

    Now and then I'm thinking about replacing the Volvo 4.3 V6 in my 18 footer with a smallblock Chevy (350). There is enough room for it, and I have worked with boats for many years now, so it's no big deal really. But I would like to keep the weight down. A cast iron small block engine is quite...
  13. HorizonblueDK

    reverse rotation cobra out drive help

    Re: reverse rotation cobra out drive help For what it's worth, here is a picture from an original OMC brochure, regarding the rotation of two opposite drives. Have you tried to unhook the hose at the thermostat housing and start the engine? From the hose, there should come a lot of water (a...
  14. HorizonblueDK

    Destroyed Volvo gear

    Here is something I would like to show you, that doesn't happen that often. A friend of mine has a 25 footer with a 280 drive and a 41 diesel engine. The original 40 engine was replaced by a previous owner. On a trip last year, he heard a loud BANG, stopped off course to check what was wrong...
  15. HorizonblueDK

    Twin OMC mech stringer on dual station boat (flybridge)

    I have sometimes wondered how the steering was setup on a boat with twin OMC mechanical stringers and dual station (flybridge boat). I saw this picture of such a boat. So I'm asking, is this steering arrangment original, or did the boatmanufacturer build it himself? The electrical Stringers...
  16. HorizonblueDK

    Pinion shimming on an SX drive

    Can I use this tool for shimming the pinion gear/shaft on an SX-M outdrive? OMC Pinion Shimming Tool Part 3850599 | eBay It looks exactly like the one pictured in the original Volvo Workshop manual, but the P/N should be 3855098. If the tool in the auction was for shimming a dog clutch OMC...
  17. HorizonblueDK

    Vibration because of long exhaust pipes ?

    I have made my own thru-hull exhaust. It has been re-designed a few times. The way it is now, is silent outside the boat, at low speed. So I don't annoy any fellow boaters, when warming up the engine(4.3 V6) and leaving the dock. But inside the boat, is sounds like someone is holding a grinder...
  18. HorizonblueDK

    165 hp Stringer, dies when warm

    My friend has a 25 feet boat with twin OMC 165 electric stringers. I take it for a spin now and then. I never go beyond 1500 rpm, since it's not my boat. (I don't take any chances with this fragile old setup). We clean the thermostats now and then, since a small piece of rust hinders the...
  19. HorizonblueDK

    Will an old circulation pump work, going counter clockwise ?

    I have completed a serpentine belt conversion on my 1992 Volvo Penta 430 (4.3 V6). Previously, the engine had traditional V-belt. This now means that the circulation pump is running counterclockwise. It is the original pump. Are the older pumps designed for that? I have actually already...
  20. HorizonblueDK

    Tom Dane performs "New York New York"

    Thomas Eje (aka. Tom Dane) and his orchestra has learned to perform "New York New York" by listening to an old record over and over again. Unfortuneatly it had a few scratches......
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