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  1. adam_g

    Low voltage

    1995 Sea Ray 7.4 L Bravo 1 I changed out my dual batteries this year only because the other batteries were 5 years old. When I start the boat I notice that I only have about 10 V wihile idling and pulling away from the dock. Once I get the RPMs up over about 1500 the voltage jumps to 14V and it...
  2. adam_g

    Bravo 1 Big Block Overheat

    Bravo 1 7.4 L 1995 Sea Ray Open Cooling System I have a kind of baffling situation. When cruising below 3000 rpm temp is a steady 170. When I get up on plane the temp climbs to 185. The boat never used to go above 170 anytime. I inspected the raw water impeller and the thermostat over the...
  3. adam_g

    exhaust shutter design change? 1995 7.4L

    I lost an exhaust shutter (1995 7.4 L Bravo1). The manual calls out 807166A1 which is two flaps with a square grommet to hold it in the tube. The local parts guy says the new design is 807166A3 which has a ring that retains the assembly. I emailed merc and they say that they will respond...
  4. adam_g

    Baffling Overheat and Restoring Trust

    We were skiing for 20 minutes when the engine (7.4 L Bravo 1) overheated. We were no where near shallow water for the previous 20 minutes. Immediately we shut down. I checked drive water intakes-clear. We waited about 10 minutes and restarted and almost immediately overheated again. I got a tow...
  5. adam_g

    shudder Bravo 1

    ------------------------------ -------------------------------------------------------------------------------- I have noticed a slight shudder sometimes when I slowly engage my drive (Bravo 1 7.4 L). This never happens when I push it into forward or reverse "normally&#
  6. adam_g

    Trim Spacer

    Quick question. I knocked the Quick question. I knocked the crescent shaped plastic trim spacer out when I was putting my Bravo 1 drive back on. I left my manuals at the lake. Does the spacer go in front of or behind the bolt/bushing of the trim cylinders? Thanks
  7. adam_g

    U joint in Bravo 1 drive

    Last year I had the u-joints r Last year I had the u-joints replaced mid-season. I just got around to pulling my drive for inspection and lubrication and I was suprised to find that the u-joints are now sealed with no grease zerks! What kind of life can I expect from these? Is this the normal...
  8. adam_g

    Exhaust Bellows

    7.4 L Bravo 1 I recently had 7.4 L Bravo 1 I recently had some work done and when I picked up the boat I told my mechanic that he forgot to install the exhaust bellows. What he put on was what I describe as "half" a bellows. It lines up with the lower unit when trimmed down but is open when...
  9. adam_g

    Raw water pump Bravo 1

    Ready for spring commissioning Ready for spring commissioning. Everything done on the list including replacing the old raw water pump (7.4 L Bravo 1) with a new style one-piece body pump. I fired the engine up with muffs and a good flow of water. No water through engine. I shut the engine off...
  10. adam_g

    New style raw water pump

    "I am replacing my entire raw "I am replacing my entire raw water pump (Bravo 1, 7.4 L) for spring p.m. In the past I just changed out impellers. I bought a new Mercruiser pump that apparently uses a "newer" one-piece design that eliminates the separate end cap. There are no stainless steel...
  11. adam_g

    Gimble Bearing

    "I am just getting around to c "I am just getting around to changing my gimble bearing. 7.4 L Bravo 1. Everything is clean and no sign of water intrusion or corrosion. Bellows are in good shape. The bearing won't budge. I am using a slide hammer puller. I gave up for the night. Are there...
  12. adam_g

    Gaskets on exhaust riser

    Doing my winter thing on my &# Doing my winter thing on my '95 7.4 L Searay. When I pulled the riser elbows off of the manifolds there were no gaskets. Metal to metal with no sign of any kind of sealer. I do not believe these have ever been off before. The engine has 200 hours. I notice that...
  13. adam_g

    Compression test

    I thought that I would do a co I thought that I would do a compression test as I was changing my plugs. Engine is a '95 7.4L carbureted with 200+ hours. Range is from 127- 135 on all cylinders. The problem is I tested the engine cold. The boat is already winterized and I can't warm it up...
  14. adam_g

    Bravo 1 lower

    "I just bought a factory rebui "I just bought a factory rebuilt bravo 1 lower as a spare, (Besides boating my hobbies include hitting submerged objects.) I noticed significantly more side to side play in the input shaft than is on my old lower gearbox. I seems to go away when I apply downward...
  15. adam_g

    Exhaust bellows Bravo 1

    End of the season and I notice End of the season and I noticed my exhaust bellows has a LARGE hole in it. I may have been running all summer like this and didn't notice it (large swim platform). The boat has not been out of the water all summer. Could this have damaged anything? What could...
  16. adam_g

    Aluminum vs Magnesium

    In very clean fresh water is m In very clean fresh water is magnesium preferable to aluminum for sacrificial anodes?
  17. adam_g

    MERCRUISER BRAVO ONE LOWER GEAR CASE

    "I want to replace my Bravo 1 "I want to replace my Bravo 1 lower gear case at the end of the season. The boat is a '95 searay with a 7.4 L motor. The previous owner said that the drive had been replaced. When, I don't know. What is the difference in these castings with the oil hole and can...
  18. adam_g

    Damage caused by overheating

    "Bravo 1 7.4 L My cooling wat "Bravo 1 7.4 L My cooling water intakes got plugged the other day and the motor quickly overheated. It ran that way for about 2 minutes before I could get to a spot to shut it down. Docked it, replaced the impeller, flushed the mud out of the system, crossed my...
  19. adam_g

    Bravo 1 out of water

    While doing one final test bef While doing one final test before going to the lake I ran my Bravo 1-7.4 L with the muffs and no prop. Most of the exhaust and water does not exit the prop hub until I hit 4000 rpm and even then it seems that most bypasses. Also the temp was rapidly fluctuating...
  20. adam_g

    Lube u joint on bravo 1

    "Is there any easy way to lube "Is there any easy way to lube the u joint on a bravo 1 w/ a 7.4 engine? I managed to grease the slip joint, but I can't even see the u joint. How often does this need to be done? I am afraid that I will have to pull the outdrive."
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