AA45 Piston/liner in a MAC 45

[Shane Bastick]

Hi guys,

will a stock AA45 piston liner fit straight into a MAC 45 without modification, I realise the rods are different, so could we still run the steel rod on the AA45 piston

thanks in advance

 

[WIDEBOY]

Shane

They fit straight in a Mac 45 and you can run the steel rod with them.

I Have some for sale by the way.

Steve

 

[Shane Bastick]

thanks Steve, will it fit any blue headed MAC, as I have both blue headed models, 1st blue head and last blue head, If so , I will take one of the piston/liner sets from you, I'm in Australia buy the way,

Shane

 

[Roger Lee Hooks Sr]

Hi guys,

will a stock AA45 piston liner fit straight into a MAC 45 without modification, I realise the rods are different, so could we still run the steel rod on the AA45 piston

thanks in advance

Shane you got PM.

 

[Al Hobbs]

There is a difference in the crankshafts. There is an A/A crankshaft to use the aluminum rod that comes in the A/A engine. There is a different A/A 45 crankshaft to fit the MAC steel rod and needles. You can use the crankshaft you have in the MAC 45 with your rod when you install an A/A piston/sleeve.

The wrist pin on the MAC 45 has a slightly larger diameter, no difference in length. The alignment pin in the MAC 45 is slightly larger than the alignment pin in the A/A 45. So, you have to open up the slot in the A/A sleeve to fit over the MAC alignment pin.

It is not difficult to use an A/A 45 piston/sleeve to keep your MAC 45 running. Several boaters have used an A/A 45 piston/sleeve to save their MAC 45 engines.

Al Hobbs

 

[charles siler]

I run a set in my twin 45

 

[Steven Bryant]

I've been running the AA sleeves in my MAC45 and they work really well, certainly a cheap way to keep the engines running.

 

[P THOMAS]

So if the wrist pin dia is larger on the mac 45 how do you fit the AA piston. I need a couple mac 45 rebuilt.

 

[Andy Brown]

So if the wrist pin dia is larger on the mac 45 how do you fit the AA piston. I need a couple mac 45 rebuilt.

The piston bosses need to be opened up about .001". 600 grit rolled around a drill rod, WD-40 and a little time will accomplish the job.

 

[Al Hobbs]

Andy has helped a lot of boaters keep their MAC 45 engines running using the A/A 45 piston and sleeve.

Al Hobbs

 

[Shane Bastick]

What about the different versions of the blue headed mac 45, were the liners the same or different, i.e. will the AA liner fit both versions

 

[WIDEBOY]

Shane

Did you get my PM

 

[charles siler]

http://www.intlwaters.com/index.php?showtopic=60629&hl=

 

[charles siler]

Not to confuse the subject but here is some more information.

Through this link above .

 

[Shane Bastick]

Shane

Did you get my PM

I did Steve, last night, I'm just not sure whether to go that way or not now, the piston bosses need to opened up, i.e. not a drop straight in scenario,

 

[David Murany]

Shane

Did you get my PM

I did Steve, last night, I'm just not sure whether to go that way or not now, the piston bosses need to opened up, i.e. not a drop straight in scenario,

You can drop it right in by using an AA wrist pin. It will just have an etra thou clearance with the AA pin. That's what I did with mine.

 

[Shane Bastick]

thanks David, will have a think about that option

 

[charles siler]

Shane I'm also working on a nova 46DD piston and liner fits the Mac block also . I have a mac rod on the rossi piston and I'm waiting on bearings for the block to assemble it . Our ice just went out and I'm just fighting off a super bad cold this Sunday is our first test and tune weekend. I'll post some pics of the rossi parts in the next few days. Pass ya later Charlie

 

[Steven Bryant]

Shane you'll have no problem using the AA pin, it works well and ive had no problems with it.