[BECKS]

Greetings All, A few people have commented that the prop on my "new" boat looks a bit on the small side. I cannot do the calculations as I do not know the gearbox ratio. The engine is a Perkins 6354 fitted with a velvet-drive gearbox V-drive. The boat is ashore for a few more months, so I can"t do the sums on the water. Can I calculate the ratio with a strobe on the shaft? Any ideas you clever people out there? BECKS

 

[Davy Holt]

hiya,

have a look at the link below, you may be able to identify the box from the pictures

http://www.marinepartssource.com/velvetdrivepb/index.asp

 

[ChrisP]

Your gearbox will have a serial number on it, make a note of it and drop an email to

http://www.velvetdrive.com/marine.html

The UK dealers are

http://www.velvetdrive.com/marine/uk.html

 

[BECKS]

Greetings, Many thanks Davy and Chris, I will have another look for the number. I wasn"t aware Velvet drive were stilll around.
BECKS:clap3:

 

[Davy Holt]

Hiya,

Greetings, Many thanks Davy and Chris, I will have another look for the number. I wasn"t aware Velvet drive were stilll around.
BECKS:clap3:

It should be on a small metal plate on the top of the box near the oil filler.

 

[BECKS]

Greetings all, Been up to the boat today, cleaned up the gearbox housing and no sign of a makers plate, so no luck there. Any other ideas welcome.
BECKS

 

[alana]

you could always turn the motor one rev" and count how many times the prop goes around. take out the injectors fist, unless you are built like POPEYE

 

[BECKS]

you could always turn the motor one rev" and count how many times the prop goes around. take out the injectors fist, unless you are built like POPEYE

Thanks Alan, most people say i am built more like Pluto. The trouble is the manual states about 6 different ratios fractions apart. Is it that cruical to get it ****-on?
BECKS

 

[alana]

theres a web site. castel marine. with a down load called propcalc, i think? you can put in all the variables and see what comes out

 

[Afishionado]

Alana has it right. But you need to see the engines crank rotation before it goes into the gear box. Can you see the engines front pully? If the answer is yes grab a pot of white Tipex and get back to us.

Afishionado