Re-powering a MacM from 70 HP up

[The Mutt]

I had a Chrysler 440 (7.2L for you metric freaks)

Careful you might insult us deviates!

Glenn

[ROAD Soldier]

I had a Chrysler 440 (7.2L for you metric freaks)

Careful you might insult us deviates!

Glenn

It's ok you can repent. You can start by getting rid of you Range Rover and buying a real sexual tyrannosaurus 4X4 like mine. If you keep it original white or decide to go with bedliner yellow it's ok I will not think less of you. You can even call the 242CID engine a 4.0L engine, just don't call it a 4000CC engine, that would be gay.

[The Mutt]

Not enough room in a Jeeeeep, the name sounds like nocturnal noises coming from the bush, I prefer the Rangie, luxury all the way, great ride from the coil springs, fantastic ride from the air suspension, combined with a truck diesel engine makes an excellent tow vehicle.

Glenn

[Octaman]

Okay, so, here we are; it's raining, it's cold outside and worst of all, the propeller hasn't arrived yet.
So, while we wait, I uploaded a few more photos for those interested.



Here's the wedge that went in,


and you can see how the Suzuki DF100 lifs up without touching the 'raised' helm seat.

The 'raised' helmseat was a mod performed for the 70 I had previously that fortunately requires no modification at all as the new engine, even though slightly larger in external dimensions, fits beautifully under the 'raised' seat and swings freely up and down.
You can also see how the steering cable comes out of the starboard side and connects to the engine. Also a mod of the past.

Have a great weekend!

Octaman

[beene]

Sweeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

I like it

Very clean

Love the steering cable vs the stock one

Love that seat mod. Don't think it would be tall enough for my 75 though. And Highlander's is even taller than mine. The 150 we looked at was a 2 stroke and had a shorter head.

Cheers

G

[Highlander]

Geoff.
Where's the pic's you took at the boat show of that nice hinged & swing - out helmsman seat brkt on that nice 40ft boat we were on now that was a nice set - up but I need the pic's if I am going to make something simular

J

[Highlander]

Octaman
Ah Yes very nice indeed the plastic wedge kit will be better than the alum one in salt water never new they were avail when I installed mine ! where did you get then !

Geoff.
Where's the pic's you took at the boat show of that nice hinged & swing - out helmsman seat brkt on that nice 40ft boat we were on now that was a nice set - up but I need the pic's if I am going to make something simular

J

[vkmaynard]

Is the cavitation plate even with the bottom?

Did you add a backing plate on the top bolts?

[Octaman]

Is the cavitation plate even with the bottom?

Did you add a backing plate on the top bolts?

Victor, these photos are for you . . .







I have always had a backing plate on the top bolts, also with the 70. Kept the same one with the 100. Don't have a photo of it, sorry.

Octaman

[Octaman]

Ah Yes very nice indeed the plastic wedge kit will be better than the alum one in salt water never new they were avail when I installed mine ! where did you get then !

Highlander,
the plastic wedge is available locally in the marine market here in my part of the world.
Octaman

[vkmaynard]

Looks really nice. Can't wait for the performance report.

Do you have a lot of extra weight in your M?

[Octaman]

Victor,

I’ve been very weight sensitive from day one. The MacM is extremely tender and sensitive not only to weight but also to weight-distribution. After setting up the boat with all necessary equipment, I set a principle that goes, “For whatever comes on the boat something else must go off”. Ha! Ha! It doesn’t always work that way though but if you believe in the principle it makes you weight conscious at all times.
As a result, I have nothing extravagant on my boat that adds unnecessary weight but at the same time I have everything I need. And yes, the kilos do add up. I still think I’m on the lighter side compared to some of the Macs I have seen on this site with all their extra mods and stuff on board.
Now I have 30 plus extra kilos with the new engine. Ha! Not sure what has to come off for that; maybe do away with the aluminum mast and get one made of carbon fibre. Ha! Ha! It doesn’t end, does it?

Octaman

[DaveB]

That's why some of us Old Salts prefer to Motor/ Sail at 5-6 knots and burn fuel at 12 knots to High Tail to a anchorage in a Thunderstorm.
95 % of the time I Sail or motor-sail if under 2 knots making way Sailing and never do over 6 knots unless winds permit.
I usually have no need to get to one place and usually sail were the wind is comfort.
I usually adjust sails to 15 degree max heel with allowance of 20degrees with gusts.
I am not a Gentleman Sailor as I love to beat to windward as I find it much more rewarding as a work out.
Working out is how much you can twink the sails to beating under 45 degrees to windward.
Thats easy in a 2-3 ft. chop in 12 knots of wind with a 105 jib, you also can do 42 degrees and still do 5 plus knots in 2-3 ft. seas.
Dave

Victor,

I’ve been very weight sensitive from day one. The MacM is extremely tender and sensitive not only to weight but also to weight-distribution. After setting up the boat with all necessary equipment, I set a principle that goes, “For whatever comes on the boat something else must go off”. Ha! Ha! It doesn’t always work that way though but if you believe in the principle it makes you weight conscious at all times.
As a result, I have nothing extravagant on my boat that adds unnecessary weight but at the same time I have everything I need. And yes, the kilos do add up. I still think I’m on the lighter side compared to some of the Macs I have seen on this site with all their extra mods and stuff on board.
Now I have 30 plus extra kilos with the new engine. Ha! Not sure what has to come off for that; maybe do away with the aluminum mast and get one made of carbon fibre. Ha! Ha! It doesn’t end, does it?

Octaman

[The Mutt]

I'm with you DaveB, it's a lot easier on the ears to sit on 20 - 25 degrees of heal and point the bow accordingly, I have hit 38 degree heal and heard about it for weeks after. We have set up "Imagine" as a sailing motorhome, a way of getting away and relaxing, my days of going around the bouys is over .... it was fun in the 70's the 80's started to get too regulated by wannabe controllers of the clubs I sailed with.

Sorry if I hijacked the thread, your motor looks good Octaman.
Glenn

[Octaman]

Dave,
I agree with you totally. Maybe one day when I become an Old Salt too, and will have all the time in the world, I shall be able to slow down. Then, I'll start a new thread, 'Re-powering a MacM from 100 HP down!' Ha! Ha!
When I'm alone, I only sail; but when the family is on board, we don't all share the same degree of patience and have different priorities. So we need to go fast. That's why I love the Mac. It keeps everyone happy.

Glenn/The Mutt,
I agree with you too. I am/was a racing sailor but over the years lost interest because it became so 'regulated' as you say and, may I add, 'sponsored'. We used to race for the fun of it, then at the end of the day, we'd all get together and drink our wine and laugh and comment and admire the able sailors. Now, if you win a race, you are the bad guy, plus you are a threat to depriving others of their 'sponsor' (money). Ha! Ha! Good old days? Or, are we just becoming too old ourselves, unable to follow the evolution of society? Ooops! You got me hijacked there.

Thank you All for the good comments. Can't wait to get on the water and start breaking-in the motor. Regretfully, that may not be too soon. But, . . . . I'll tell you what I did the other day; couldn't stand the fact that I did not have a prop and could not go out on the water and test Suzi. It was good sunny day, so, I drove our MacM half way down the ramp, fired up Suzi and let her idle for 20 minutes. She fired up straight away, with one or two rounds more of cranking the first time, then as she got rid of all the preserving oil and old fuel, she became very smooth, humming very quietly. Now she starts at the flick of the switch. As beene says, Very Sweeeet!

Octaman