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  1. San_Diego_SeaRay

    How To Plug An Old Engine Into NMEA 2K

    Hello All - I have a carbureted '93 Mercruiser 7.4 engine and I'd like to use the NMEA 2k network to monitor things like RPM, oil pressure, voltage, and water temp. Basically make my analog gauges obsolete. Apparently there are some devices out there that allow you to plug analog signals into...
  2. San_Diego_SeaRay

    '92 7.4 Carburetor Accelerator Pump Not Working

    1992 Carb'd Bravo 7.4L (Weber/Carter AFB?) I haven't run this boat for a couple years and now that I did, I noticed there isn't a jet of fuel when I manually apply quick throttle. But there isn't much of a hesitation, either. (Also there isn't a load; running it on muffs.) Are accelerator...
  3. San_Diego_SeaRay

    1993 7.4L Gen V Fuel Pump Issue?

    Serial Number 0F009622 1) Can't get my engine started and decided to look for fuel pressure. I disconnected the fuel line from the pump and turned over the engine. No fuel comes out. Bad right? Can't be the anti-siphon valve preventing the pump from pumping? 2) Someone posted a few years ago...
  4. San_Diego_SeaRay

    Bravo Shift Cable Bellows Ripped in Half....

    ....just replaced it a year and a half ago when I replaced the entire shift cable and housing...??? Anyway, what is the easiest way to replace this bellows? Is it as easy as removing the drive then removing the aft jam nut at the gimbal housing? Then push the cable housing towards the transom...
  5. San_Diego_SeaRay

    Has anyone seen or heard of a trailer tire doing this?

    About two months ago I came across a good deal to buy some good looking 16 in trailer tires + rims. I never really liked my generic looking galvanized rims so I thought I'd jump on this deal for some sexy aluminum rims w. tires. So I dismounted my old rims and tires and propped them up on the...
  6. San_Diego_SeaRay

    Questions about Reversion on 454 Engines

    So I have two boats: A 1993 Chaparral 270 cabin cruiser and a 1998 Reinell Bowrider. Both have run of the mill non-MAG carb'd Bravo 7.4s. I believe the 1993 is Gen 5 while the 1998 is Gen 6. I'm just finding out about this issue that 7.4s have where they have "cam overlap" or maybe it's called...
  7. San_Diego_SeaRay

    1998 Bravo 7.4 Alternator Exciter Wire Not Showing 12V....

    .... at the end that connects to the alternator stud. I can physically trace it back to to a wiring harness branch that wraps around the back of the engine near the distributor, probably terminating near the cannon plug. Without tearing apart the harness (aka electrical tape), any ideas where...
  8. San_Diego_SeaRay

    Gen 2 Alpha - Do you need to remove the engine to change trim pump hoses?

    I'm asking for a friend so I don't have all the engine info. But on my Bravo setup I thought I remember that I could just remove the hydraulic manifold at the bottom of the transom assembly, unscrew the fittings then feed the hoses back into the engine bay and remove them from the trim pump...
  9. San_Diego_SeaRay

    1998 Bravo 7.4 Non-Magnum - Have Ruined 3 Impellers w/o ever putting the boat on the water...

    ...and now I just ruined the 4th one....:confused: Happy 4th Weekend. Hope everyone is enjoying themselves! Long story short: Boat hasn't been in the water >4 years due to a bad gas tank that had to be removed from under the deck and replaced (my projects are stretched out for maximum fun...
  10. San_Diego_SeaRay

    How do YOU run a BRAVO system with the sterndrive removed

    1993 270 Chaparral w. 7.4 Bravo 1 Drive I've removed my sterndrive and I need to run my engine. I was thinking of rigging up a hose that ended with a barbed hose fitting as pictured that would go into the Bravo water hose at the Gimbal housing as pictured. Is there a better way? I plan on doing...
  11. San_Diego_SeaRay

    Ok to swap old style manifolds (overflow) into a system w. new style T-stat housing?

    Year: 1998 Engine: Gen VI 7.4 Bravo Serial: 0K281139 I have a set of older style manifolds that have the overflow inlets in the risers. However, they are for a boat that has the newer style T-stat housing where there are only 2 one inch hoses coming out; going directly under the manifolds. The...
  12. San_Diego_SeaRay

    Can I Bypass The Ignition Module on a Thunderbolt V?

    Have a 1998 Merc Carb'd 454 w. a TB V ignition. After many months of not running, it couldn't generate spark. Thought it was the ignition sensor but swapped that out and still no spark. So that pretty much means it's gonna be the Module. I have a green/white and a red/white wire coming out of...
  13. San_Diego_SeaRay

    Can you swap a 350 Dizzy into a 454?

    Have a carburreted 1998 454 and have determined that the dizzy sensor is bad. While I wait for the new sensor, am wondering if I can pull the dizzy out of a 1982 vintage 350 that has I *think* an old Mallory with upgraded (from points) Pertronix module. Are these GM distributors interchangeable...
  14. San_Diego_SeaRay

    Diagnosing Trim Pump Noises

    My trim pump sounds like it's laboring both going up (1st sound) and especially going down (2nd sound). I think the "going up" sounds acceptable, but the "going down" does not. It's hard to appreciate how bad the "going down" sounds in real life when you listen to the clip. Any thoughts of...
  15. San_Diego_SeaRay

    Do Not Rotate Engine While Distributor is Out - Merc Manual

    1998 Merc Gen VI 7.4 I have my engine half disassembled and I would like to do a compression test on it before totally re-assembling. But the Merc Manual says I shouldn't rotate the engine w. the distributor out. Is this solely because it doubles as an oil pump? What if I used one of those oil...
  16. San_Diego_SeaRay

    Where To Find Riser Fittings....

    My new risers (1993 454) came with a plug, no actual inlet fitting. Need to unscrew the plug and add these fittings. Anyone know where to get these? Are they universal NPT fittings I might find at a good hardware store? If so, what size and thread?
  17. San_Diego_SeaRay

    Setting the Valve Lash on a 1998 Gen VI 454 Engine

    So page 3A-24 of Manual 16 says that "No valve adjustment is needed. Simply torque the rocker bolts to 45ft lbs and that sets the lash". Is it really that simple? No "spinning of the engine"? Just torque each rocker arm to 45 lbs? Other online resources like THIS GUY indicate that you should...
  18. San_Diego_SeaRay

    Which engine do I have? My Serial Number doesn't make sense...

    I have a 23' 1998 Reinell Bowrider w. a Bravo One setup (7.4 Engine). I'm in the process of re-intalling the heads after taking them off for a valve job. I have Merc Svc Manuals 16 and 23, which both cover the 454/7.4 engine. The problem is that I'm trying to figure out exactly which manual I...
  19. San_Diego_SeaRay

    Anybody Have Any Luck Epoxying Exhaust Manifold Surfaces?

    1998 Merc 7.4 Bravo One cylinder had a stuck valve due to manifold failure/water intrusion into exhaust ports. So I took off both of my heads and brought them to a machine shop. After jet cleaning, they say overall the heads look in pretty good condition. The major issue is that a few of the...
  20. San_Diego_SeaRay

    Mercruiser MC-1 1.32 Drive

    Serial Number: 6267140 Ratio Stamp?: H So I have this sterndrive that I bought a few years ago. Back when I bought it I didn't know any better and was told it was an Alpha Gen 1 drive w. a 1.5 ratio. I brought it home and put it in storage (I bought it w. a Merc engine and it was the engine I...
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