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  1. kwoolard

    Thunderbolt IV Ignition Questions

    A friend of mine bought a fixer-upper and has been trying to diagnose a no-start, sometimes hard to start condition. The engine just cranks over as if not getting spark. Then sometimes it will start and when shut down a couple of minutes later it will not restart. Mercruiser 260 - 4 brl -...
  2. kwoolard

    Spark Plug Access

    1999 Sea Pro 235WA Cuddy Cabin - 5.7L Mercruiser - Alpha Gen II I have changed the spark plugs in this boat about 2 years ago when I was converting my cooling system to closed cooling. The exhaust manifolds were off at that point. Now trying to check the plugs and what a pain in the *****...
  3. kwoolard

    WOT Questions

    Boat: 1999 - 235WA Cuddy Cabin Sea Pro Engine: 5.7L Mercruiser - 250hp, 2 Barrel Mercarb, Thunderbolt 5 Ignition SternDrive: Alpha Gen II Last year I rebuilt my carburetor, replaced rotor, cap and plugs during a tune-up. Engine runs great at idle and throughout the rpm range with a slight...
  4. kwoolard

    Vacuum Gauge Readings

    Guys, This nice weather we had this past weekend forced me to get my boat out of winter storage. Over winter I bought a MityVac single brake bleeding kit that comes with a vacuum gauge you can use for engine diagnostics. Anyway, hooked it up to my engine and the only accessible spot, other...
  5. kwoolard

    Need help finding parts! - PROBLEM SOLVED!!!

    I am looking for the ignition module plug connections for the 5.7 Alpha Thunderbolt V Ignition Module (861253-1). Can't seem to find a part number anywhere, I would assume they would come together as a kit. For some reason my ignition module is leaking some sort of fluid out and is causing my...
  6. kwoolard

    Need help with prop selection

    I currently have a 235WA cuddy cabin Sea Pro with 5.7L-250hp Alpha One sterndrive(1.47:1 ratio). My current performance numbers with gps are: 2 People, 60 gallons of gas, gear = WOT 4500 rpms @ 39 mph, Cruise 3400 rpms @ 32 mph 4 People, 125 gallons of gas, gear = WOT 4100 rpms @ 35 mph...
  7. kwoolard

    Loss of RPM

    Boat: 1999 235WA Sea Pro Engine: 5.7L Alpha Gen II Eng. Ser. No.: 0L364401 I have another thread out there trying to find the right rebuild kit for my carb, but I wanted to ask in this thread if anyone could tell me the reason for my loss of rpm after the boat sat up for the winter. Since the...
  8. kwoolard

    Which Carb Kit??

    Engine/Drive: 1999 Mercruiser 5.7L - Alpha One Gen. II - 2 Barrel Carb. Engine Serial No.: 0L364401 Drive Serial No.: 0L422470 I have looked through some parts catalogs and have found a few that look like they would work for my carb. Does anybody know the correct carb kit for this model...
  9. kwoolard

    Temperature Gauge Accuracy

    I was wondering how accurate are marine temperature gauges? The temp gauge that I have has a range from 120-240 degree F. It has number increments at 120, 180 and 240 with one tick mark between the 120 and 180 and one between the 180 and 240. I am assuming that the tick marks are 30 degree...
  10. kwoolard

    Fresh Water Cooling

    I installed a freshwater cooling kit from San Juan Engineering yesterday. The kit was number MC-321, a full system (block and manifolds). As I installed the parts I filled everything up with antifreeze to help prevent large air pockets forming. When done installing I filled the heat exchanger...
  11. kwoolard

    Oil Pan Plug Size? - 1999 5.7 GM

    I am going to get one of those quick oil drain hose kits and was wondering what size my drain plug is.....1/2-20, 12mm or 14mm?
  12. kwoolard

    Engine Noise at WOT

    I purchased this boat back in June of this year. It is a 1999 235WA Sea Pro with a 125 gallon tank, 5.7L 350, Alpha Gen II with a 2 barrel mercarb. I am currently running a 19 inch pitch propeller and have a WOT of 3900-4000 rpms with 4 people aboard. Over the past week I changed my plugs...
  13. kwoolard

    1991 55 HP Yamaha - bogging on acceleration

    A friend of mine is having trouble diagnosing why the engine bogs down when you give it throttle. He has replaced all fuel lines, new fuel and plugs and has rebuilt the carburetors. The motor idles fine but bogs when given any throttle. Could this be the reed valves or do you think it is an...
  14. kwoolard

    Y-Pipe Tee Fitting

    A buddy of mine has a 350 mercruiser driving a Type-1 outdrive, with the 3 piece Y-Pipe. He found out while putting the boat over that the tee fitting and the bottom of the y-pipe had a hole corroded in it, and was looking for a replacement. Does anyone know the part number for that fitting...
  15. kwoolard

    Which oil filter?

    I'm running a 1999 5.7L Alpha Gen II, serial number 0L364401. Went to the parts store to get an oil filter and the part number the part guy sold me was 35-866340K01, however, I was just checking the online catalog at mercurypartsexpress and it states that I need 35-866340Q02. The part number...
  16. kwoolard

    Metal particles in gear housing oil

    I drained the oil in my 1999 Alpha I Gen II drive yesterday and noticed when I took the drain screw out of the bottom there were very small metal particles on the magnet. As the oil was draining I would frequenlty let it run through my fingers and noticed for the first minute or so of draining...
  17. kwoolard

    Freshwater Cooling Kit - Full or Half?

    I want to install a freshwater cooling kit on my 5.7L Alpha I Gen II engine which has never seen saltwater in its life. The boat is a 1999 but the engine was new in 2004. Original manifolds and risers were put back on the new engine. I will probably be using the boat in saltwater about half...
  18. kwoolard

    1999 5.7L Mercruiser Alpha One Gen II - Sluggish Starter

    Batteries are charged 100%...as soon as I hit the ignition switch the starter hesitates then starts to turn the motor over. However, it seems the starter turns over very sluggish, as if the batteries are weak. The engine will usually fire right up on the second try, it just worries me. I feel...
  19. kwoolard

    Water Flow 1999 Mercruiser 5.7L

    There is a hose that runs from the starboard exhaust manifold to the intake manifold on my engine that is not shown in any water flow diagrams that I have for my eninge. Hopefully the jpeg file attached to this post. You can see the hose on the manifold. It is a steel hose that has a black...
  20. kwoolard

    99 350 5.7L Mercruiser - What outdrive?

    I have just purchased a boat, and was trying to figure out if I had the gen. 1 or 2 alpha outdrive. The serial number on the drive is OL422470. Can anyone tell me what drive I have? Thanks!
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