how old is this motor

[dverstege]

Looking for new prop but don't know how old or what type (DT 20MSH
DT 20MLH / DT 20ESH / DT 20ELH /ex: )

[dverstege]

sorry pics didn't upload I'll try again

[dverstege]

sorry about this I never uploaded pics on RIBnet before

[Nos4r2]

It's from 1987 and in remarkable condition for it's age!

Prop types from an '87 DT20 should all be the same-you just need to find the right pitch.

This might be useful to you....

http://store.brownspoint.com/pdf/DT20(86-88).pdf

If it's a Manual Start, Short Shaft then I'd guess at it being a DT20MSH.

[9D280]

Wow. that's in well good condition!

For waht it;s worth, this lot is copied from the 2005 Suzuki Prop brochure (Have a trawl round the Suz website - you'll probably find the latrest version)

DF25/30 and DT20/25/25C/30/30C
DF25/30 DT20 DT25 DT30 DT25C DT30C

Type Material Blades Diameter Pitch Part Number
P1001* Aluminum 3 10 1/4 10 58100-96410-019
P1101* Aluminum 3 10 1/4 11 58100-96420-019
P1201* Aluminum 3 10 1/4 12 58100-96430-019
P1401* Aluminum 3 10 1/4 14 58100-95D00-019
P1501* Aluminum 3 10 1/4 15 58100-96460-019
P911+ Aluminum 3 10 1/4 9 58100-96370-019
P1101+ Aluminum 3 10 1/4 10 58100-96470-019
P1211+ Aluminum 3 10 1/4 12 58100-96480-019
P1311+ Aluminum 3 10 1/4 13 58100-96490-019
25-30 Stainless Steel 3 10 1/4 12 99105-00600-12P
25-30 Stainless Steel 3 10 1/4 13 99105-00600-13P
25-30 Stainless Steel 3 10 1/4 14 99105-00600-14P
25-30 Stainless Steel 3 10 1/4 15 99105-00600-15P
Diameter and pitch are measured in inches.
*=Press-In Type Bushing, +=Heavy Duty Propellers; Press-In Type Bushing,

If you get the proper thing off the websitre it also gives you all the bushing info as well.

[dverstege]

Thanks Nos4r2 and 9D280. I was on this sight http://store.brownspoint.com/dt20.asp
They make things a little confusing at least for me.
I have a 3x10 1/4 x12 prop on now but was looking at a Piranha prop but they only have X11 or 13 and from what I gather will play games with the rpm on the motor. Being new to boating I kind of like keeping everything the same. The motor is good and still starts first pull every time and powers my little Metzeler as fast as I want to go.
Thanks again.

[Nos4r2]

For what it's worth I think you're doing the right thing by sticking with the original prop. It might be worth ebaying yourself a nice cheap 13" pitch though just to see if it's any faster. Always worth having a spare!

[9D280]

dverstege,

The simple way to look at it is to compare the prop pitch (i.e. the last number of the spec) with the gears on your car. Now imagine you are climbing a gentle hill with your foot buried in the carpet. A smaller pitch is like being in a low gear - the engine will rev freely, and it will climb the hill no problem, but because it's a low gear your top speed is limited. A high gear (high pitch) and the engine will be labouring up the hill. Ideally you want a low pitch to dig you out the water & puit you on the plane. Once you're there the drag drops and you ideally can then move to a higher pitch. The thing with an outboard is that you can't change props once you start to move, so somewhere in the middle is the "ideal" (or more accurately optimal) pitch.

Generally speaking the diameter is limited by the space under your Cav plate, so don't worry about that too much, 'coz there's not a lot you can do about it!

For what it's worth my old 4m Searider with a Suz 25 of similar vintage to yours had a 13" pitch (P1311 in the list) and ran OK, but didn't accelerate too quickly.

Hope this helps.

[dverstege]

Just bought a original prop new for the suzuki $45 and the brass and rubber disk that fit inside of it for $25, Think I got a good DEAL??

[Nos4r2]

Hard to tell-we're mostly used to paying UK ripoff prices