Search results

  1. E

    Mercruiser 7.4L heat exchanger repair

    I’m sorry but I don’t know what champ or monitor system is referring to. It’s a mercool heat exchanger on 7.4L mercruiser engine with thunderbolt ignition. Does that help.?
  2. E

    Mercruiser 7.4L heat exchanger repair

    Thx guys, I can sand flux and neatly solder copper pipes but this sounds like it might b above my pay grade. I’m an electrician by trade but I have a few good HVAC techs that I work with. I know they have to braise condenser lines so is this something I should ask them to help me with. I’m...
  3. E

    Mercruiser 7.4L heat exchanger repair

    Hello everyone, I’m a new owner of a straight inboard boat equipped with a fresh water cooling system. Yesterday I had my starboard engine start overheating so I shut it down and limped in on port. I just located what I hope is the only problem with cooling system. One of the copper 90 degree...
  4. E

    Twin motor question. 2 standard rotation or 1 Std & 1 rev.

    Hello all here’s a little more info if needed. Vessel 1989, 29’ Sea ray, powered by twin std rtn 5.7 and A1 G1 outdrives. Lost starboard side engine last season. Removed from boat, tore apart and found broken v spring in head. So was going to rebuild engine while it’s out but I wanted to see if...
  5. E

    Twin motor question. 2 standard rotation or 1 Std & 1 rev.

    Thank you.
  6. E

    Twin motor question. 2 standard rotation or 1 Std & 1 rev.

    Does it matter? Advantage,disadvantage of either. Have 1 working Std rotation on port now. Bad motor pulled on starboard side. Was STD rotation. Looking for any info that may be helpful in moving forward… literally and figuratively.. thx
  7. E

    Loud Synchronized bang at about 4-5 sec intervals coming from alpha 1. ?

    So, I replaced the shift cable from merc. 5.7 to outdrive and still same problem, then I swapped lower unit out (with a used one), then I swapped the shift lever out because it seemed a little “sloppy” but nothing. Another merc/alpha boater said it could be a bent or worn shift shaft. Has anyone...
  8. E

    Merc boggs down at 2,300 rpm’s when in gear.

    Could be several things quality of fuel supply- empty contents if fuel filter into clear jar should be fresh clean gas low fuel pressure measure fuel pressure at that rpm should have 4-6 psi is the ignition system in good shape timing properly set and is full advance happening carb could need a...
  9. E

    Merc boggs down at 2,300 rpm’s when in gear.

    So 350 gm block with alpha 1 gen 1 outdrive. Put her in gear, give her gas everything is peachy until around 2,300 rpm’s and she starts bogging down. Starts up perfect, idles perfect, put her in neutral and she purrs at 4K rpm.. but not in gear.. electric fuel pump with Holley dbl pmp carb. I’m...
  10. E

    Gel coat advice

    Thank you for responding!!
  11. E

    Gel coat advice

    That’s what I figured but I’m guessing that all the cans at the store where I got it are all bad.. so now I’m trying to find another retailer..😫
  12. E

    Gel coat advice

    Hello everyone. I bought a can of gelcoat(no wax) at my local boat store 3 hrs ago. Opened the lid, grabbed my cordless dewalt drill, a small paddle bit and the can had about 2” of solids on the bottom. I proceeded to try and mix the can up and in every motion and speed possible and here I am...
  13. E

    Alpha one gen 2

    Hello, hope everyone is well. I am replacing The 5.7 In my boat with A 7.4 and was hoping someone might know if the outdrive has to be changed for larger motor..? Thx
  14. E

    Alpha 1 Drive shaft

    Sooo I’m no boat mechanic but I have pulled off about a half dozen mercruiser outdrives and never once.... until now ran in to an issue where the driveshaft Would not release(I had to hammer the nut off with a punch to remove unit) I tried everything I could think of today to pull it out and it...
  15. E

    Trim sender, gauge or wiring issues..not working. Where to start?

    Just looking for any input on the best way to diagnose the cause of faulty reading. Tried lowering unit, loosening screws and adjusting the sensor Both directions and gauge never moved from all up position. Was thinking That the next step I might take is to disconnect sensor wires from terminals...
  16. E

    Starter replacement issue

    I’m thinking I was probably given the wrong starter but figured I’d check with you all before I tear it back out. I replaced my starter because the drive(bendix ) quit and starter was just spinning without engaging flywheel. So I bolt on a newbie, reconnect wires and as soon as I turn my battery...
  17. E

    Info help needed regarding Engine swap

    Does anyone know if I replace my 5.7 mercruiser with same size pcm engine will it be compatible with the Alpha1 gen 1 outdrive currently in boat? The replacement pcm engine is also a vortex and the merc Coming out isn’t, does this matter?
  18. E

    5.7 Gm mercruiser coolant issue

    Hello All. I am trying to figure out if a the engine block in a boat I recently purchased is done or not. Boat was not winterized when I picked it up but no exterior cracks to block, manifolds, risers are visible. I was told that the risers/ manifolds were bad and caused water to get into...
  19. E

    Please help..Stuck on stupid today!

    Ok, it’s Monday and I’m feeling pretty stupid for even throwing this question out there but I have the day off today and wanted to take this opportunity to install a controller in an 87 Thompson cruiser that I have been(painstakingly) trying to restore. So I hooked the cables and cut out switch...
  20. E

    Hole in Alpha 1 lower housing

    Here’s what I do know Hole location: Bottom rear (closest to transom) right above tiny weep hole is now a high performance super flo hole. Appears to be located in a separate cavity in casting..isolated from shaft, gears and such at least where the hole is located.. drive: I/O alpha 1 with...
Top