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  1. W

    Reman 305 Engine with 2 different heads, and open cooling ports?

    So, we ordered a new marine reman engine from a major rebuild of GM engines... But, I noticed that the 305 we received has 2 different heads on it. One side is a 416 head (which I know tons about and fully understand) but the starboard head is a 450 casting head, which I know NOTHING about...
  2. W

    AQ280 PT trim dilemma...

    So, the plastic circle casing mechanism trim sending unit on my late model 280DP-PT was beyond trashed when I got the boat a while back. I've ran without it for a good couple seasons becaus I can never find one that's affordable to replace it (WHY vp decided to make that thing out of plastic AND...
  3. W

    AQ225D with Pertronix HEI Dpark plug gap

    Looking for the spark plug gap, and trying to better understand spark plus in general, because I've gotten recommendations from .025 all the way to .050! That seems like a HUGE gap in knowledge amongst thre dozen or so people I talked to. So, I have an AQ225D engine, but no longer have the old...
  4. W

    Which ring cushion does the actual sealing on AQ drives?

    As the title says, which ring does the sealing to keep water out of the boat? I've done a lot of research on this, but I keep seeing answers for both the EXTERNAL and INTERNAL ring being superior to one another for sealing the water out... Some are sweating up and down the external ring does the...
  5. W

    AQ225D power steering oil cooler, 1985 Sportcraft Fisherman

    So, I've noticed there is a pretty heavy leak on the bottom of this cooler (probably just gave way finally with all the freezing temps and etc this winter) and I cannot find another replacement of this style ANYWHERE. It's P/N 851376 and I have only been able to find junk ones. It has an odd 90...
  6. W

    AQ280-DP PT blockoff plate option?

    At the end of the season (thanks to Rick and the rest of the guys here!) I got my thru hull exhausts rigged in and going well. I temporarily left the exhaust y-pipe in place to not have to remove the engine a 3rd time and just plugged it with a 3" plumbing plug aft of the transom, and two fernco...
  7. W

    280 Outdrive steering turns slightly more one way than the other...?

    Ok... So I am baffled at trying to center the steering on this 280 outdrive. It was turning slightly more port than starboard, by about an inch and a half. So, I assumed that the splines were off a spline or two by previous owner, so I reindexed the steering by dropping the steering fork...
  8. W

    AQ225D thru-hull exhaust outlet dimension?

    I'm trying to determine the best overall outlet dimension for my thru hull exhaust. I know that it's 3.75" (95mm) coming off of the risers, but meeting in the current y-pipe into one smaller outlet (for back pressure I'm assuming?) So, do I run smaller exhaust sizes around 2.5" or so from each...
  9. W

    Having trouble setting hinge pins correctly AQ280-PT

    Finally got my engine mated, got my outdrive mostly installed, but I'm getting hung up by not being able to rotate the hinge pins so the locking bolt can ride down inside... I have a massive semi truck screwdriver to try and rotate it the 1/8" I need, but it just simply will not budge (in have...
  10. W

    Need some PDS and engine coupler guidance...

    So, I pulled the engine and refreshed her. New timing chain, new seals from the block up, and cleaned and inspected all the internals. After putting in new pds bearings and seals, I am trying to reinstall the engine. But I just spent the better part of 3hrs with a buddy, trying to drop the...
  11. W

    Torque Spec question for AQ225D

    I have searched high and low, and I simply cannot find particular torque specs for my AQ225D. I've downloaded the shop manuals from Volvo, but they only contain outdrive torque specs. I have the Seloc manual as well, but it only has some of the most rudimentary torque specs for a few select...
  12. W

    Never seen an AQ280 lower unit like this... is this a 290 lower or something?

  13. W

    Never seen an AQ280 lower unit like this... is this a 290 lower or something?

    All my 280's have had a singular exhaust flapper on the lower unit of the drive. This has a split flapper that kinda overlaps itself slightly, and it also doesn't have the hump in the center like my other 280's.... is this a 290 lower unit or something, or am I just completely missing something...
  14. W

    Clamping Ring Bolt Question (with picture)

    On my 280-DP/PT I just took off, I'm looking at the clamping ring from outside the boat, and wondering if I even need to touch these bolts that are pretty corroded. I'm taking the engine out to install new pds bearings (84' 305 AQ225D) and I am not sure if I have to remove these rusted bolts...
  15. W

    Question on resealing an 280 DP-PT

    I have pulled my drive today (280 duoprop with power trim) and am planning on resealing it as I found the gear oil to be a little milky. I believe it was leaking through the upper unit because the drive bellow had a tear in it and a decent amount of water was in it when I pulled the drive. But...
  16. W

    Need help on AQ225D Distributor OR fuel issue

    Hi guys, just bought a new to me 1984 Sportcraft 250 Hardtop with a 305 in it attached to a 280-PT Duoprop. 800hrs on the engine/outdrive, and decent maintenance on it thus far. I know the boat has good compression and is a great runner, as I used the boat many times this season with my buddy...
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