Compatible High Thrust Prop for Martin 100 kicker

[jhoncho4x4]

I am wanting to use my 10hp Martin 100 for a kicker motor on a aluminum 1969 19' Starcraft Starchief cabin cruiser. Does anybody know if the prop that fits the Martin 100 is the same type that is used on a modern brand of outboard? That way I can order a high thrust prop for that brand and use it on my Martin. My Martin 100 is a 1953 aquamatic with clutch.
I am also open to any suggestions on the proper prop (size/pitch) to use for the kicker.
My boat specs are:
120 hp Mercruiser Inboard Alpha 1
Concave Vee
Center Length- 18' 4"
Gunwale Length- 19' 7"
Beam- 85"
Bow Depth- 44"
Center Depth- 38"
Transom Width- 75"
Transom Height- 39"
Approx Weight- 1,600 LBS
Recomended Capacity- 1,700 LBS
There would normally be no more than 4 persons.
Later today I will post on this thread a picture and specs of the prop that is on the Martin now and the gear ratio of the lower unit.

 

[steelespike]

Re: Compatible High Thrust Prop for Martin 100 kicker

There is a Martin expert out there; can't recall the name.
Go to www.aomci.org and ask around.If anyone knows your options it would be him.You might be able to adapt a prop from a 60 or a 75.That might get you a pitch closer to what you need for your application.If you get yourself a tinytach you could tell better what you may need at least to reach
the proper rpm.

 

[hwsiii]

Re: Compatible High Thrust Prop for Martin 100 kicker

Jason, I will be awaiting the picture and gear ratio, and Spike is right you need to get a Tiny Tach for it to know how many RPM it is turning.

H

 

[jhoncho4x4]

Re: Compatible High Thrust Prop for Martin 100 kicker

Specs .55" shaft size, .18 shear pin size, 1" deep backside of prop to pin seat, 7 3/4" prop
The lower end ratio is the power head spins 1.5 times for every revolution of the prop.

 

[hwsiii]

Re: Compatible High Thrust Prop for Martin 100 kicker

What is the pitch of the prop.


H

 

[jhoncho4x4]

Re: Compatible High Thrust Prop for Martin 100 kicker

What is the pitch of the prop.


H

8 x 9 1/4

 

[jhoncho4x4]

Re: Compatible High Thrust Prop for Martin 100 kicker

There is a Martin expert out there; can't recall the name.
Go to www.aomci.org and ask around.If anyone knows your options it would be him.You might be able to adapt a prop from a 60 or a 75.That might get you a pitch closer to what you need for your application.If you get yourself a tinytach you could tell better what you may need at least to reach
the proper rpm.

I already posted the same question on AOMCI. Martins are two cycle alternate firing twins, will a tiny tach work on them?

 

[steelespike]

Re: Compatible High Thrust Prop for Martin 100 kicker

Yes the tach for your motor will work on any 2 cylinder 2 stroke.
It works off pulses from a plug wire.Be sure you read the info carefully
to be sure of application and wire length.You can't splice it.

 

[hwsiii]

Re: Compatible High Thrust Prop for Martin 100 kicker

J, as soon as you get the RPM and speed let me know and I will tell you what pitch you need.


H