Not a super mod but she run 74mph, mariner 30hp 689 model75644
Type: Posts; User: Dvdracing; Keyword(s):
Not a super mod but she run 74mph, mariner 30hp 689 model75644
Only half of gearcase submerged to get maximum speed
All homemade prop
mostly homemade prop
Info from engine builder
3hp approx = 42 mph
5hp approx = 38 mph
Not sure why 3hp faster than 5hp
Dean,
Let me find out the approx speed of 3hp and 5hp
71760
Sarawak Borneo mate !!
7174871749717507175171752717537175471755
Yup, alive and keep booming
Local Builder and design, not associated to UIM
Borneo mate
7163371634716357163671637716387163971639716407164171642
71623716247162571626716277162871629716307163171632
716077160871609716107161171612716137160771614716117161571616
Powerabout,
What rules to comply for this Asian Tour ?
40hp class
68423
Roflhat,
Solution was too simple then overlook
Race all day long with engine no overheating issue
6842068421
Mike,
We successfully with this design since 30 years ago , over 500 racers in our region did with this system , the whole ideal was only block the gas exit to the bearing carrier, seal the mouth...
Mike,
We successfully with this design since 30 years ago , over 500 racers in our region did with this system , the whole ideal was only block the gas exit to the bearing carrier, seal the mouth...
We submerged only half of the gearcase in the water, Yes ! water flow up, however need some modification internally, seal the exit gas at bearing carrier, seal & block the gas passage at upper and...
What power gain to be expect ?
New intake system for new project 30hp yamaha68418
Hi Mike,
I am working on research converting Yamaha 30hp x 2 cylinders, also plan converting a 56 omc in future
Dearest All,
What steps to consider if converting stock motor to pro = alcohol / methanol / nitromethane ?
Regards,
Dvd
Zul8tr,
year : 1990
stroke : 2
prop pitch : winrace 4 blade x 18.5 pitch
gear ratio: standard 1.84 ratio
mod : copy of jimmy johnson mod c kilo record of 91 mph
mod: shaving head, big bore...
left : sst60, middle: mod 30hp, right : mod 40hp, 66220 back : sst60
66218 fun time
Jimboat ,
Malaysian local class named : " mod 30hp class "
Jimboat !
Fun in term of ?
Hi Jimboat,
Question: what is the possibility of flipping for 11 footers tunnel boat with 30hp yamaha at speed 81.3mph for flat water and 83.7mph (GPS) for slight choppy ?
Regards,...
We also race the smallest 2hp631286312963130
Mini Tunnel63117
I just need the gears for spares
My question is this nitro lower not the bolt
Can anyone confirm if this is nitro lower with 15:28 gears ?6309763098