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  1. HorizonblueDK

    OMC Stringer hydro mechanical shift

    I have acquired a 1982 18 footer with an OMC stringer, full mechanical shift, and was wondering what was the exact problem with the "hydro shift assist", on the earlier mechanical stringers, since OMC went away from that system ?
  2. HorizonblueDK

    470 4 barrel conversion, one cylinder missing

    I have converted my 470 into a 4 barrel carb, since I had a donor motor with all the parts needed. I rebuild the carb, took all the time in the world to make sure everything was right, cleaned and blew out every passage inside, installed bushings on the primary shaft. But something is wrong, I'm...
  3. HorizonblueDK

    Mercruiser 470, 2 to 4 barrel carb conversion.

    Yes, it has been debated before, but many threads are quite old now, so I think it's time again :) Here is the story. I have a 23 footer with a Mercruiser 470 (2 barrel carb) It goes well, I have a 14.5x19 propeller on it, and it pulls the boat on the plane quite ok, when we are two people in...
  4. HorizonblueDK

    Mercruiser 470 starter options

    I have bought a 23 footer with a Mercruiser 470, year 1986. In general, the 470 engine seems to be cranking slow, when looking at youtube videos, mine is no exception. On another boat I have, with a 4.3 V6, there is a gear reduction starter, very nice starter, small but powerfull. It would be...
  5. HorizonblueDK

    Volvo Penta AQ 170 carb linkage

    I don't know how many runs these engines anymore, but I would still like to show a little update I have made. The original carb linkage for the triple Solex setup was, in my eyes, not the best solution. A little difficult to synchronize the carbs perfectly. So I have made my own system...
  6. HorizonblueDK

    Volvo Penta AQ 170 running lean issue solved

    I have a 17 footer with an AQ170 engine (B30 straight six, triple Solex 44PAI ). I bought the boat as a project and finished it a couple of years ago. The boat is mostly used on the lakes nearby, which are no wake zones, so I hardly ever take it on plane. But sometimes when there are no canoes...
  7. HorizonblueDK

    Flooding Rochester 4ME

    The other day, my friend was having trouble starting his 4.3 engine. It ran a few seconds, died and there was a smell of gas. A day later, I tried starting it, and the same thing happened. Looking at the engine and yes, there was gasoline in many of the cavities on the intake manifold, so...
  8. HorizonblueDK

    Rare Volvo Penta I/O setup

    Has anyone ever seen this Volvo I/O setup? Chevy straight six engine with Volvo outdrive.
  9. HorizonblueDK

    GM 250 inline six, modern version

    I thought that the Chevy 250 inline six(used as Mercruiser/OMC 165 in the 70's) was discontinued somewhere in the 80's, and never produced after that. But apparently is has been used in a Chevrolet Omega in the 90's, in Brazil...
  10. HorizonblueDK

    Smoking carburetor Volvo AQ170(Solex PAI 44)

    Last Saturday I synchronized the triple carb setup on my Volvo AQ170 B30 engine. Ran the engine warm first, took off the flame arrestor and started adjusting according to the manual. I noticed that a little smoke came out of one of the carbs (with the engine off). Thought that it was just a...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
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