Exhaust hub on the 17" creates a low pressure area behind the prop pulling water down from the surface possibly uncovering your blades. Suggest you drop down on the transom a bit and see if that...
Type: Posts; User: Ed Hatch; Keyword(s):
Exhaust hub on the 17" creates a low pressure area behind the prop pulling water down from the surface possibly uncovering your blades. Suggest you drop down on the transom a bit and see if that...
Believe the item pre-dated the 20H and was originally marketed to the KG7H user. Complete and partial examples of this item show up on Ebay on a fairly regular basis. If noise police inhabit your...
Small 6 cyl Mercs had two different crankshafts. The early motor, MK75/78 had a crank based the original prototype tuning, in effect Three 2 cyl cranks. The later Merc 800/850 cranks had a different...
Seem to remember a hollow transom with holes drilled at the top facing the inside of the boat and a bunch of corresponding holes drilled along the outside lower edge of the transom about an inch up...
My Boatsport.org website will give you a good idea of outboard racing in the 1950's.
The success of racing in the 1950's was a combination a strong economy, the easy availability of race motors,...
The tuner measures 2 3/8" by 2 3/8" inside dimensions at the outlet and 1 1/2" by 1 3/4" up top.
Check out this link
http://www.hainesengineering.com/rhaines/sitka.htm
If you go to Boatsport.org there are PDF files of most of Hal Kelly's raceboat designs. You can download the PDF files of any design, take it to a commercial printer and have him scale up the full...
I believe the 45SS gearcase has the same bolt pattern as the generic 56 cube towers. With a stub driveshaft, a coupler, a cut down stock driveshaft and a modified water tube would be required to...
From the photo of your boat it appears that you are running a stock height tower. The Bass unit and other racing towers typically are much shorter so you'll need to cut down your transom to around 10...
A pretty common practice on the mercury blind bore motors, big gain is another story, rather part of a combination of mods, port timing, open exhaust etc. If done poorly you've ruined your block as...
Wouldn't it make more sense to get beyond the CDI rev limitation first before opening up the engine? If you can't resolve the RPM limit issue ther is no point in cutting up the engine.
Have you...
Not familiar with rice motors, if you have a tower with the 56 cube bolt pattern why not take advantage of the SST60, if you have to come up with a tower then there is no real advantage going OMC.
For the effort and $$$ you'll need to fiddle with that 56 cube block you might find it easier to pick up an SST60 powerhead, it is 56 cubes, puts out around 90 plus HP and parts are still available...
There are two sources of the throttle hookup you need for your 4 Cyl Merc. Check Ebay item number: 270297360692. This is sold by Mike Downing, a reliable Ebay seller.
There also is a fellow by...
There was two Quicksilver tower heights. The Q is the earlier and taller version and Merc changed over to the H in 1953.
There was also two skeg configurations, the original earlier version had...
There is a special tuner that goes with the SST60. I have to guess that some of the performance is due to the tuner. Went to the local OMC and they wanted $500 some odd dollars for the tuner.
...
Your V4 weighs an awful lot for a 13 ft boat (C-D version of the Mad-Cap is 13' ). Finding high pitch OMC props will be difficult. There is no point in spending $$$$ opening up the intake side of any...
There are 231 cubic inches in a gallon.