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  1. 5

    Maximum exhaust riser height?

    I have a set of the mercruiser silent choice exhaust cutouts that I want to install. My boat has an integrated swim platform that is exactly at the same height as the current exhaust riser outlet. Can I space the riser up another 4-6 inches so I can install the thru hull exhaust above my...
  2. 5

    Need sea water pump and bracket for Bravo 1

    I am removing the 1990 Alpha 1 drive from my boat as well as the 350 mag engine. I'm swapping in a 383 stroker that I'm building, as well as a Bravo 1 drive. I need to figure out what bracket and sea water pump I can use on the new engine. I will be swapping all components from the 350 magnum...
  3. 5

    Converting Alpha Gen 1 to Bravo One

    I have a 1990 boat with a 350 magnum Alpha one. The boat is somewhat unreliable because the Alpha drive, upper unit, lower unit, or both seems to break at the most inopportune times. I've been told that my 'heavy hand' combined with a heavy boat and powerful engine is what continues to cause...
  4. 5

    Prop size for kicker motor?

    I have a 15hp kicker motor on my 23ft boat. Two questions... Does the prop on the kicker have to extend below the bottom of the boat? What size prop should I look for to get more thrust from this thing? It's a Sears gamefisher Eska outboard thing that will be hard enough to find a prop for...
  5. 5

    Replacing lower unit drive shaft Alpha gen 1

    So I had a driveshaft strip out on my lower unit. How do I go about replacing the driveshaft with one from a parts lower unit?
  6. 5

    Alpha 1 Gen 1 lower shift foot won't stay in place

    The shift foot at the lower unit will not stay up in place where it mates to the upper unit. I'll put it back up into its slot with a pair of pliers (it is sliding up and down) and it will stay for a little while but fall out of place shortly after. I put a small clamp on it and it has stayed...
  7. 5

    Hit something on the water yesterday...

    Small mine perhaps? But seriously, I don't know what it was. The boat jumped up a bit with a bang and then I had no forward movement. Put the drive up to inspect and found most of the lower unit missing in action. I'm sure water dribbled into the upper unit but I didn't run it after the...
  8. 5

    1946 Evinrude model 4389 Light Four Gear Oil

    Does this outboard use gear oil or grease? I'm trying to find out for a co-worker. We have the motor here, model is 4389 and s/n is 21671. Any info about the lower unit service procedure and recommended lubricants would be greatly appreciated. Thanks.
  9. 5

    Is a 2004 6.2mpi internally balanced?

    I got a deal on the crank, rods/pistons and heads from a 2004 6.2mpi, I only have these items and I'm looking to build a 383 stroker with vortec heads using some sort of roller cam (truck maybe?) and a 350 block. I'm going to need to get pistons that are 0.030 over but right now I'm trying to...
  10. 5

    Gelcoat restoration with good results

    No amount of polishing compound, wax or 'gelcoat restoration' product could fix my oxidation issues. After hours of meticulously using these products, I ended up with a gelcoat that looked slightly brighter and was back to being faded/oxidized after a week or so. I saw someone on here post...
  11. 5

    Best way to get rid of fiberglass debris (sanding dust)

    I have been working on repairing a large hole in the hull of my boat below the water line. I have been wearing a 3m respirator, safety glasses and using the shop vac while grinding. Despite my best efforts, the interior of my boat has been exposed to a light coating of dust from fiberglass...
  12. 5

    Gelcoat for my truck?

    I've been hanging around the restoration forum and I'm finding I really like working with fiberglass and gelcoat. My pickup is one of the old Fords with the rusty wheel arches and bad paint. Is there any reason why I can't sand down the rust to bare metal and repair the holes with 1708 and poly...
  13. 5

    Hull repair on 1990 boat

    Last October I made a repair to my hull after an unfortunate encounter with a concrete drain underwater at an unfamiliar dock. That was here, http://forums.iboats.com/forum/boat-...ut-fixing-this Now I have a crack NEAR the repair I made last year. The crack appeared two weeks ago after a good...
  14. 5

    Sudden loss of spark - please help

    I'm away from home with my boat -1990 MCM 350 Magnum- and while navigating an inlet, the engine just cut off. I quickly tried to restart, and nothing. The tide was taking me away so I quickly dropped the anchor. I checked for spark and nothing, it has Thunderbolt-V (edit: it's actually...
  15. 5

    WOT temp creeps too high

    I have a 1990 MCM 350 Magnum, I don't have the S/N handy but let me get your opinion anyway. Took the boat out for the first time memorial day and didn't have any issue except the temperature was creeping up past the normal 140* and continued past 180* at wide open throttle. WOT is 4400 rpm...
  16. 5

    Nose cone on lower unit, what to attach with?

    All I want to do is attach the nose cone that I've already removed from my old lower unit to my replacement lower unit. It was setup for a low water pickup which was nothing short of silly on my boat. I'm eliminating that function, I just want to know what kind of epoxy or adhesive I should...
  17. 5

    MC-1 lower unit on alpha upper?

    Re: MC-1 lower unit on alpha upper? Ok, that's good to know. Since my lower units don't seem to be lasting too long, I don't intend to pay too much for replacements. I got a real ugly alpha one lower with half a skeg on ebay for $80.. it's a real gem, look at the fine skeg and cavitation...
  18. 5

    MC-1 lower unit on alpha upper?

    I am having some trouble keeping lower units from breaking. I had one break at the beginning of the season, and now I have another one broken 100 hours later at the end of the season on my last trip out. I don't know if it's the torque of my engine, it's the 270hp which seems right on the cusp...
  19. 5

    Loss of spark under load.

    1990 MCM 350 Magnum, not sure of serial number. Under heavy load, like getting on plane or accelerating faster while planing, I notice a loss of spark when I toggle things like trim tabs or engine trim. It happens more often in damp or rainy weather, sometimes it doesn't do it at all. I...
  20. 5

    How do I begin to go about fixing this?!

    Re: How do I begin to go about fixing this?! Well I made good progress, there is no longer a hole in my boat. It looks pretty bad but it is strong. This is what I woke up to after it cured over night with the halogen light on it. This is what I was left with after sanding. Then I put a...
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