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  1. M

    Sea Foam prior to oil change?

    I have dual 1985-85 Mercruiser 228 GM 305's Believe they have about 350 hours a piece on them. Everything seems to be running great. I was contemplating on the next oil change to run Sea-foam in the oil prior to changing. Is it worth doing it, or just leave well enough alone and do a regular...
  2. M

    Prop Dillema 1974 Cobalt 19V

    Ok, I understand about as much as I thought I needed to know about Props and choosing the right one for your application. Although I am a bit confused about what I am seeing in my setup. I am currently running a Propco S24 14X18 Aluminum prop and the 225 OMC GM 307 is still able to rap up the...
  3. M

    Prop Dillema 1974 Cobalt 19V

    Ok, I understand about as much as I thought I needed to know about Props and choosing the right one for your application. Although I am a bit confused about what I am seeing in my setup. I am currently running a Propco S24 14X18 Aluminum prop and the 225 OMC GM 307 is still able to rap up the...
  4. M

    1974 OMC Stringer Tilt Issues-resolved, bad solenoid

    I have been doing a lot of searching and have not found anything difinitive in solving the tilt problem for those old stringer electric shift drives. I can't read the serial form my drive, but it is a 1974 OMC high profile stringer, electric shift without the true course steering. It shift and...
  5. M

    Shoot thru hull placement ideas

    I am going to be getting into the process of finding a suitable location for a shoot thru the hull application for my transducer.<br /><br />I was wondering if some of you could share some tips and tricks for what to do to initially locate a good location. I.E. How did you hold the transducer in...
  6. M

    225 OMC mild backfire(exhaust)

    I am getting a very quiet backfire around idle to 1500 rpm or so, no sound whatsoever from engine. The backfire is not toally constant and occures once about every second or 2(very quiet, but I can hear it) I don't recal this from running it before.<br /><br />The only thing I have done...
  7. M

    Idea for post solutions in forum

    While reading a lot of posts either to educate myself or troubleshoot a problem I was having, I couldn't keep thinking how useful it would be to have a new icon that is editable by the poster to show a completed solution in thier thread.<br /><br />This obviously would rely on the poster to...
  8. M

    Having issue achieving propper charging voltage.

    Recently replaced my original Prestolite Alternator on my 1973 225 OMC with a one wire. The voltmeter on the boat never read more than about 11 volts, regardlessof if running or not. Previos to replacing the alternator, it was evident that the voltage on the boats meter(not perfectly acurate)...
  9. M

    Transducer location

    I have a matrix 27 fish finder, and am trying to locate the correct location for the transducer. I have a rather aggresive v hull, even in the back of the boat. Currently while running over pretty much displacement speed, I believe the tranducer is too high off the water and just reads...
  10. M

    Cruising RPM's on OMC 5.0?

    I was just wondering what your best MPG(not gallons per hour)RPM is with a 5.0 V8? I am just getting mine back into shape, its an old engine. got the 8th cylinder working yesterday(defective plug) and was going to take it for a spin in a bit.<br /><br />I found with the 7 cylinders at about...
  11. M

    Power, Torque, RPM, Speed question

    I wanted to ask a question relating to RPM and speed as it relates to the power and torque output of the engine.<br /><br />All things being equal, prop trim, boat wieght, atmospheric conditions, water surface. If your engine is able to turn 4000RPM and achieve 35 MPH. is it possible that...
  12. M

    Distributor cap problem?

    Had the boat out and engine seemed to run great, sounded good anyhow, but seemed to lack a little power. I noticed the timing wasn't advancing so I tackled that and while working on that decided to check the plugs and gaps.<br /><br />Took out the 3 plug and it was wet while all the others were...
  13. M

    Total Advance Timing Definition?

    I need to work on my timing advance. I know what to do and why I need to do it, but doing a lot of research on what advance timing is and how far it should be set has me a little confused.<br /><br />I know if it starts predetonation and pings you have gone to far, so that is a dirty, kind of...
  14. M

    Mechanical advance not functioning-found solution

    I am going to poke around more with it tomorrow, but I took my malory YL series flatcap distributor apart and cleaned all the springs and weights and such. Everything nice and clean and moves, till I place the plate back on it and the wieghts seem to be bound in the channels that allow them to...
  15. M

    where to mount trim tabs

    You are in luck, I just finished installing my smart tabs an hour or so ago. Per those instructions they install a 1/2 inch from the bottom of the boat and out as close to the chine as you can get them. Depending on what your hull looks like that is where the horizontal bottom of the boat...
  16. M

    Replacing Alternator 74 225 OMC

    I have a 225 1974 OMC V8 and will be needing to replace the Alternator eventually as it is not charging while running. I have the original external regulator configuration and obviously want to upgrade to something more efficient and cheaper to maintain.<br /><br />I hear a lot of suggestions...
  17. M

    Backfire through carb under load

    Well I got my engine running and idling well. On the hose in the driveway everything is perfect, can rev up to 3500 and timing advances, running at 2000 rpm sounds perfect. Idles at 550-600 rpm<br /><br />Dropped it in the water for the first time and up to about 2000 rpm everything sounds...
  18. M

    Alternator Questions

    1978 GM 350V8 225hp OMC<br /><br />I think my alternator is shot, I get a constant slow discharge reading on the ammeter and the current battery charge level is always a bit lower than it was after starting and running.<br /><br />Engine runs fine(no problem with ignition it seems)<br /><br...
  19. M

    Old wood boats and water intrusion

    Me and a friend were looking at a 1941 36' Crocker Custom Ketch. This boat was listed at a rediculously low figure and has been on sale for a while. It is moored in water and as of 1999 has a new Westerbeke diesel engine with 66 hours on it, and is complete with working sails and rigging.<br...
  20. M

    Seafoam use and first time out

    I finally have my boat running like a top after flushing engine, cleaning fuel system, and replacing ignition among other things. It sounds great, but I know through running it with the old gas before and just checking the plugs during the whole tune up process, I got quite a bit of carbon...
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