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  1. S

    AQ280 Vibration

    I took 'Mavis' out of hibernation yesterday and during a short run on the lake noticed a slight vibration starting at 2500 rpm and beyond that wasn't there previously. I suspect outdrive bearings are starting to fail? I have a fresh, marinised 350 SBC in front of the drive.
  2. S

    AQ225D/280 Water in Cylinders

    Good morning, My engine was overheated and seized last season. My mechanic has it out,stripped down and pointed out that water had been in four of the cylinders. He checked the exaust manifolds for leaky jackets and found nothing. Its a raw water cooling system. The heads don't appear to be...
  3. S

    Vp aq/280

    I am looking to re-power my boat this winter. The hull originally came with a 225D driving the AQ 280. I am looking to re-power with a marinised 5.7L 325 hp. Is this too much torque for the cone clutch and drive? My mechanic is of the opinion that the engine should be the weakest link in the...
  4. S

    VP 5.7L Possible Hydrolock

    My boat had a 5.7L fresh re-build this past season and was overheated. Post incident inspection revealed seized engine however, is it possible this engine could be Hydrolocked?
  5. S

    AQ 280 Bearing Failure

    The mechanic had the outdrive apart and walked me through the failure. The top nut on the intermediate shaft had come loose and the top two bearings piled up from the filings. The cone clutch and pinion gears in the transmission are a dark colour...he figures the clutch had been slipping...
  6. S

    Changing from AQ280 to DP Drive

    I have a 280 drive bolted up to a SBC 350. What do I need to switch to a DP Drive?
  7. S

    Aq 275

    Are the drive ratio gears located in the lower or upper part of the drive?
  8. S

    Volvo 280 - 275

    Will a 275 drive handle the same horsepower as a 280 drive?
  9. S

    Aq 225d/ 280

    Two*questions for Riccardo... * My 280 outdrive is giving me trouble. Over the winter, I replaced my 5L volvo engine with a 5.7L SBC. Re-built the engine from the crank on up and have 360 hp now. * I am in the breaking in stage now and have 3+/- hours on it. Yesterday I was running a 16 x 17...
  10. S

    Aq 225d/ 280

    My 5L engine has run its course and I am now in a position to repower. What is the maximum horsepower a 280 outdrive will handle?
  11. S

    AQ225D280

    Is through hull exaust for a 5 Is through hull exaust for a 5.0L engine a good upgrade besides the fact of punching holes in your hull?
  12. S

    Maintenance AQ225D 280

    "'Mavis' is running gr "'Mavis' is running great and it will soon be time to winterize. I am intending to service my driveline in the off season and am wondering Riccardo, how many hours of labour is involved in replacing the u-joints? Also what bearings/components should be replaced? I have...
  13. S

    Prop Doctor in Nanaimo British Columbia

    Request for El_P: I am goi Request for El_P: I am going to the coast and would appreciate the prop doctor's contact information. Regards
  14. S

    57 L Marine Engine

    What is the difference between What is the difference between a marinised 350 ci and a 350 ci out of a truck?
  15. S

    AQ225D280

    "My 1979 5.0L Volvo is running "My 1979 5.0L Volvo is running near perfect...however I am unable to reach WOT. At 4300 RPM's and below she run's great, try to throttle up any higher and she will bog down. I am thinking that it is fuel related...my four-barrels aren't kicking in?"
  16. S

    AQ225D280

    My 1979 5.0L VP has been runni My 1979 5.0L VP has been running great. However when I walk on the throttle (stomp) she seems to bog until I pull throttle back to 70%. Could this be my vacuum advance? Last year I installed electronic ignition and didn't have this problem. This year my boat...
  17. S

    AQ225D280

    "Hello Ricardo... 'Mav "Hello Ricardo... 'Mavis' has been running great, however the last three times out after 45 mins planing the temp jumps dramatically. I power off for about 15 mins and restart and at plane, temperature drops to 140 and is good for another hour or so. What...
  18. S

    AQ225D280

    "Last night after an hour out, "Last night after an hour out, I developed a vibration in the drive. It felt/ sounded like a slippage occured and then vibration. i immediately throttled down and pulled boat out. Looking for troubleshooting options before I begin repairs. Regards,"
  19. S

    Props

    I am running a 3 - blade 19 pi I am running a 3 - blade 19 pitch prop on my boat.Would a 5 - blade same pitch give me more snap off the start?
  20. S

    VP 280

    Why can't a 2.15:1 ratio w Why can't a 2.15:1 ratio work with a V-8?
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