Mercury Through The Years...

**John Schubert** · 07-17-2017, 06:39 PM

Originally Posted by Mark75H

The OMC twin powerhead is shorter, but the mid is taller.

People tried them in Mod and the lower powered Merc with more mid range consistently won. Its not who's fastest, its who's "firstest"

One motor builder did build a OMC twin with expansion chamber and it did very well in the few races he took it to.

I agree, I do not think a modified 44 Merc has the potential to make 70hp.

The mid is taller but did the rules restrict the use of the standard tower? Yes I know about Anthony's project & Farmer's boat. I just wasn't convinced that picking up the exhaust in the open exhaust housing was doing much tuning.
and btw we struggled with the mid range with the 45 but were able to overcome that issue by fattening up the mid range jets and going a bit leaner on the high speed jets

**Lake X Kid** · 07-17-2017, 06:52 PM

Originally Posted by FUJIMO

Just another, of dozens, of Florida races that year...

This looks like the lakefront seawall at Kissimmee, FL.

**Lake X Kid** · 07-17-2017, 07:32 PM

Originally Posted by FUJIMO

When Mike Downard (Mercury factory driver) came to Italy in the early 1970’s, to race in the tunnel boat race at Auronzo, he brought with him from the states an advantage. Mike told me he had a secret weapon, and then unveiled a 4 bladed prop.

The unfortunate happen, Mike flipped the boat.

**FUJIMO** · 07-19-2017, 12:33 PM

**RogerH** · 07-19-2017, 07:23 PM

Originally Posted by FUJIMO

https://www.youtube.com/watch?v=x328-rUIBUs

**jackiewilson** · 07-20-2017, 12:43 AM

Originally Posted by Lake X Kid

When Mike Downard (Mercury factory driver) came to Italy in the early 1970’s, to race in the tunnel boat race at Auronzo, he brought with him from the states an advantage. Mike told me he had a secret weapon, and then unveiled a 5 bladed prop.

The unfortunate happen, Mike flipped the boat.

Phil Rolla loaned the prop to Mike Downard to evaluate it at altitude-------Mercury were light years behind in prop technology at that time.

**FUJIMO** · 07-22-2017, 06:01 PM

**FUJIMO** · 07-22-2017, 06:18 PM

**FUJIMO** · 07-22-2017, 06:25 PM

**Mark75H** · 07-22-2017, 08:36 PM

Originally Posted by FUJIMO

Started collecting parts to make something like this for one of my racing lower units that was sucking in water ... changed to a super synthetic lube that ran so much cooler that I never had to complete the project

**Robby321** · 07-22-2017, 09:09 PM

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**powerabout** · 07-22-2017, 09:31 PM

Originally Posted by Mark75H

Started collecting parts to make something like this for one of my racing lower units that was sucking in water ... changed to a super synthetic lube that ran so much cooler that I never had to complete the project

Attachment didnt Come out

**Dave Strong** · 07-22-2017, 09:43 PM

Originally Posted by powerabout

Attachment didnt Come out

I see it fine?

Dave

**powerabout** · 07-23-2017, 01:23 AM

was that Fujimo's post 6689?
which is blank for me, never had that issue before?

**bernie** · 07-23-2017, 08:14 AM

[QUOTE=Mark75H;2973630]Started collecting parts to make something like this for one of my racing lower units that was sucking in water ... changed to a super synthetic lube that ran so much cooler that I never had to complete the project.

Back in the 80's I did a patent disclosure on this for Mercury - even had test parts running on some local fish boats at the Placida test center. Never got a patent, then Merc racing came out with their version. Wonder where they got the idea from!