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  1. achris

    Finally, a good idea.

    At last someone's come up with a way to combat the problem.... https://www.dailymail.co.uk/news/article-10528709/Weapons-manufacturer-unveils-AR-15-KIDS-called-JR-15.html
  2. achris

    Converting 260MIE RH to LH.

    Hello all, Have a little job coming up for a friend. Pulling 2x 1984 260MIE out of a boat and rebuilding them. As was the want of the day, the port engine is LH, the stbd is RH. No big deal, yet... We want to stroke them to 383s, and finding a reverse rotation stroker kit is like ...
  3. achris

    Water pocket cover - the how, the why and the what.

    WATER POCKET COVER. What is it, where is it and why is it important. The water pocket cover is located in the bottom of the drive shaft housing, at the top of the exhaust cavity, of all MC-1, R, MR and Alpha One drives. It’s a plastic cover that has the copper tube from the water pump going...
  4. achris

    Why an increase in engine horsepower will hurt your ‘holeshot’, acceleration and midrange cruising.

    So you want more horsepower, who doesn’t? But this is why an increase in top end power is actually a very bad idea in a boat. You’re off shopping for more horsepower. You buy a set of higher compression pistons, a ‘lumpier’ camshaft, a set of roller lifters and higher ratio roller rockers...
  5. achris

    Mercruiser exhaust systems.

    Exhaust systems 101 Mercury’s introduction of ‘dry-joint’ manifolds (and elbows) seems to have caused more confusion than it needs to. So let’s try to unpack that confusion, and understand what is essentially a very simple system. Before we go much further here’s a picture of the various parts...
  6. achris

    Merc Alpha4 no longer available. What to replace it with?

    Engine and boat details in my signature. I was out last week and ate my 18" pitch 4 blade Alpha4 aluminium prop, to the point where it's not repairable. Just looking for help to select a replacement. Full details. With 19" (stainless steel) 3 blade Vengeance prop. Max revs - 4600, speed - 42...
  7. achris

    You have got to be joking! (Redflex bailout)

    What is going on? How does a thoroughly corrupt company gets a $5M government bailout? How does this happen? https://www.youtube.com/watch?v=BpgG4JjFm7Y Chris..........
  8. achris

    Marine engine vs Automotive engine.

    This document is for people new to repairing boat engines, and who may not understand the differences, or the consequences of fitting non-marine parts (in certain places)... What makes a marine engine different to its car equivalent? From the bare block, a marine engine is built up with...
  9. achris

    Need help finding a project thread.

    Hi all, I have searched (for hours) for a thread from one of our members who pulled out (I think) a 120hp Mercruiser and put an electric motor in. I have a friend with a 28' Bertram with 2 dead engines, and he's floated the idea at me. I have been considering a similar project for quite a...
  10. achris

    Why do you want more horsepower?

    Hi all, I just ran across this brilliant little graph... It shows the same engine with different cam/head and intake configurations to change the engine from 375hp to 400hp. I don't know what engine it is, or how the configuration is set up, so please don't ask, or denigrate me for that. What...
  11. achris

    I'm going to Mars next year!

    Yep, the title says it all. I even have my boarding pass already. :D
  12. achris

    What is 'pitch'?

    I have been reading quite a few threads lately where people refer to the propeller pitch as 'degrees'... That makes me want to ​​​ The pitch of a propeller is a measurement of how far forward, in inches, that propeller would move in one rotation, assuming no slip. I have a 17P (17 INCH pitch)...
  13. achris

    Yoke universal joint removal video

    I have commented in the past on the subject of uni-joint removal (and installation) without having to either remove and disassemble the drive gear and bearing pack or, as I refer to it, 'butcher' the cover nut... Many remain adamant that it can't be done. Well, today I have a boat in with a...
  14. achris

    How to align a gimbal bearing, and why it needs to be done. (Inc video)

    I posted this video on a thread that someone had asked for it, but thought it would be a good idea to post it as a new thread.... Stickie? Chris..........
  15. achris

    Ok, who stole summer?

    It's the end of November. We've had 1 day over 30 degrees, we still have the winter dooner on the bed and it rained most of yesterday... So, climate change deniers... Normally by this time of year we are well into summer activites... Trying to get out and get some crayfish ready for...
  16. achris

    And this is why we do our maintenance.

    Thought I'd do a quick video for you guys using my new 'drive lift'... It's been a couple of years since my drive was removed, so I thought this would be a good opportunity to kill two birds with one brick.... How quickly things can go south! Used the lift to remove the drive. Very easy. Just...
  17. achris

    350 MAG MPI start-up

    Just finished putting together a 350Mag MPI after it filled 4 cylinders with seawater. Turned out to be a cracked exhaust manifold (after the owner didn't notice/ignored an overheat alarm). The engine got the full treatment - new pistons, bearings, lifters, pushrods, etc. I took a couple of days...
  18. achris

    ACDelco spark plugs, or are they?

    Putting a 350MPI back together yesterday, and I came across something 'interesting'... Had a look at the spark plugs.. ACDelco, as per supplied by Merc... But on closer inspection, this..... That is an NGK number. It appears that ACDelco don't make their own spark plugs. They're re-branded...
  19. achris

    Australian football grand final...

    One of the very best games I've seen in a long time... Glad to say, my team WON! :D :D :D Chris........
  20. achris

    Just thought I'd share a nice photo.

    Admiral and I went out this afternoon to enjoy a nice spring sunset. Also caught a few Whiting (Sillago vitiate)... She suggested I take a photo, so I did. Just the one, and no photoshop here... Enjoy... Chris...........
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