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Simplex Thrustmatic Gearbox

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Garry Edwards
Visitor
Posted on Monday, August 09, 2004 - 10:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Does anybody have info on Simplex Thrustmatic marine gearbox
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marks
Advanced Member
Username: marks

Post Number: 67
Registered: 03-2002
Posted on Tuesday, August 10, 2004 - 08:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Garry What do you need to know?

Mark S.
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Gary Haywood
Visitor
Posted on Sunday, October 31, 2004 - 08:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Full photocopy of the Simplex manual with additional notations is available for A$20 + postage from Roger Prettyman at the Simplex Manufacturer:
Hardman & Hall
3 Stanton Road
Seven Hills
NSW 2147
Roger's email contact is: gearcoeng@bigpond.com
I know this because I am considering refurbishing a single cylinder simplix and Roger has been helping me with parts availability and prices.
I would be interested to learn what your interest is.
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Laurie smith
Visitor
Posted on Wednesday, June 03, 2009 - 04:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

i have just came by simplex single c/w gearbox all parts are available from hardm
an and hall in sydney, I need a maggy and possibly ahead, I wonder iff the cast heads are repairable
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Todd Vidgen
Senior Member
Username: todd_vidgen

Post Number: 124
Registered: 03-2008
Posted on Wednesday, June 03, 2009 - 06:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

If your head is rusted out/cracked,then the chances
are the block is not far behind.
Heads from H&H are $350,complete blocks(valves,guides,studs,etc)$1951.
Word of advice.WASH the parts thoroughly as quite
often casting sand is still in them,especially in
the intake port.They will also sell you a maggy at
a price
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Todd Vidgen
Senior Member
Username: todd_vidgen

Post Number: 125
Registered: 03-2008
Posted on Wednesday, June 03, 2009 - 06:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ps .Roger is no longer there.Geoff now looks after
this department.
The simplex part of their business wouldn't be
a quarter of one percent of what they do.
Their main line is engineering gears and components
for the mining industry.So dont expect to ring up
and have a long chat about your engine .
Nice people but very busy.
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Russell Mcculloch
Visitor
Posted on Friday, October 09, 2009 - 05:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Dose any one know or have a picture of set up of dog clutch to engine 5hp simplex
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Todd Vidgen
Senior Member
Username: todd_vidgen

Post Number: 140
Registered: 03-2008
Posted on Sunday, October 11, 2009 - 04:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

If it is a 5hp 4stroke the gearbox is part of the main casting and it is a band/finger reverse gear
type box,no dog clutch fitted
The other gear box they use is on the 10/12 twins
and the model D 4 cycle 6-7 hp Thrustmatic,
which is a cone clutch type.
The earlier reverse gear type was adjusted by
tightening the nut on the reverse gear cam swivel
(for reverse) and adjusting the set screws on the
3 brass figers for the forward gear(dont over tighten these as you can break the fingers)
The thrustmatic is a bit more complex as you
have to take the gear box apart and add or subtract shims and spacers.Gasket shims between
the engine and gearbox operating housing for fwd
gear adjustment 1/64th and 1/32nd shims are used.
5/16",1/64",and 1/32" spacers are fitted on the
output shaft between the cone and the slider.
A point to note is if you adjust one you have to adjust the other
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Russell Mcculloch
Visitor
Posted on Thursday, November 15, 2012 - 04:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

To those that are interested i now have a bracket made for a 5 HP simplex marine engine to suit a starter generator yamaha that makes it very easy starting and producing power for all those accesaries you you might want
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Laurie Derwent
Senior Member
Username: laurie_d

Post Number: 123
Registered: 10-2009
Posted on Friday, November 16, 2012 - 12:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks Russell, Are you able to provde the deatils of the Yamaha stater/generator. Are they readily available in Oz? Regards laurie
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Peter Halverson
Visitor
Posted on Tuesday, August 20, 2013 - 01:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi guys if you want a starter motor generator try Cheaper Cart Parts, I have just bought one for my Simplex @ $399.00 as opposed to about $1200 for the Yamaha model the business advertises on the net and can be contacted at 0408485108, Phil sells Golf cart parts and as sourced these from Canada as a cheaper alternative to the Yamaha models

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