PRM 1000D Drop Centre Marine Gearbox (Ahead Ratio 4.0:1) PRM-1000D4
PRM
Recommended Retail Price
£7,235.54 Inc. VAT
Online Price (inc. VAT)
£6,421.55
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Full hydraulic operation: offset or down angle output shaft.
The PRM1000 marine gearbox is purpose built for use in both pleasure craft and commercial boats; its twin countershaft design provides separate oil-operated multi-disc clutches (which need no adjustment) for ahead and astern drive allowing full rated power to be transmitted continuously in either direction.
To cater for the widest possible variety of boats the PRM1000 is offered either with output shaft, offset or 10° down angle output shaft. Reduction ratios available are 1.53:1, 2.03:1, 2.86:1, and 4.00:1 (4.00:1 reduction is not available on down angle gearbox) all of which can provide either left-hand or right-hand propeller rotation in "ahead", making the gearbox particularly well suited to twin engine installations.
The gearcase is constructed of high grade cast iron, internally ribbed for rigidity and strength, and consists of two separate halves to facilitate servicing, the oil pump and hydraulic control valves being externally mounted for easy accessibility.
The hydraulic operating system functions on normal lubricating oil of the same viscosity as that used in the engine, avoiding the need to use automatic transmission fluid, and ensures rapid response to movements of the operating lever for good boat handling. The operating lever has a positive neutral detent and is suitable for use with proprietary single lever remote control operating systems.
Robust and reliable, the hydraulic system is nevertheless provided with a mechanical lock-up device for added security, so that in the unlikely event of hydraulic failure the boat can be brought safely back to port. Access to this device is via a detachable cover located on top of the main gearcase.
A special feature of the PRM1000 is the clutched power take-off which is available as an optional extra; this will power a hydraulic pump to SAE J744C type 'B' specification, thus providing an economical and space efficient means of driving on-board machinery.
An electronically operated trolling valve can be fitted, which will allow variable speed of the propeller to zero whilst allowing a maximum engine speed of up to 1200 rpm.
It is essential for the engine, transmission model, reduction ratio and propeller size to be correctly matched so that the engine can attain its rated speed appropriate to the relevant service classification without labouring.
It is also necessary to ensure the torsional compatibility of the complete propulsion system from engine through to propeller, since disregarding this may result in gear noise, particularly at low speed operation, and may even result in damage to the engine as well as the transmission components.
Operating Pressure
Minimum - 30.34 bar (440 PSI), Maximum - 33.44 bar (485 PSI). Two tapped holes 1/8" BSP on the top, and M18 on the side of the valve block are provided so that the pressure gauge can be fitted if required.
Oil Cooling
The normal operating temperature of the oil should be in the 50°C - 80°C range and should not be permitted to exceed 90°C. An oil cooler is necessary to ensure that correct operating temperatures are maintained, and two 3/8" BSP connections are provided on the valve block to allow it to be fitted. The size of the cooler required depends on a number of factors including the transmitted horsepower, operating speed, duty cycle, inlet water temperature and ambient temperature.
Propeller Thrust
Both ahead and astern thrust is carried by the output shaft bearings which are of adequate capacity for all factory approved ratings.
PRM1000 Gearbox spline: 18 teeth 12/24 DP. Oil Capacity: 4.0 litres (7.04 pints).
| Gearbox Manufacturer | PRM |
| Gearbox Model | PRM 1000D |
| Brand | PRM |
| Country of Origin | United Kingdom |
| Hydraulic or Mechanical | Hydraulic |
| Shaft Arrangement | Drop Centre |
| Warranty [Years] | 2 |
| Approximate Dry Weight | 93kg (205 lbs) (excluding adaptor, drive coupling & oil cooler) |
| Capacity | Oil Capacity: 4.0 litres (7.04 pints) (plus the amount required to fill the cooling circuit) |
| Construction | High Grade Cast Iron Gearcase |
| Gearbox Spline | 18 teeth 12/24 DP |
| Nominal Power Rating Heavy Commercial | 9.40 BHP / 100 RPM |
| Nominal Power Rating Light Commercial | 9.96 BHP / 100 RPM |
| Nominal Power Rating Pleasure | 11.50 BHP / 100 RPM |
| Ratio Ahead Stern | 4.000:1 |
| Replaces | PRM 601S, 601M, 601D |
Showroom & Postal Address:
Chas Newens Marine Company Limited
Ashlone Wharf Boat Yard
Embankment
Putney
London
SW15 1LB
Phone:
0208 788 4587
Delivery
Our Mail Order team ship chandlery, yacht parts and sailing clothing around the world. We try to use the best value couriers available, and we will endeavour to get your products to you as quickly and as cost effectively as possible.
As with everything automatic, sometimes it might not present you with the best value price, please feel free to contact our helpful team who will endeavour to provide you with our best price for shipping to your address.
UK Standard Delivery
Please use the checkout process to get an accurate shipping quote for your cart, all of our rates are automatically calculated based upon your selections.
As with everything automatic, sometimes it might not present you with the best value price, please feel free to contact our helpful team who will endeavour to provide you with our best price for shipping to your address.
International Delivery
International Delivery is calculated based on a series of complex formulae at checkout and includes options such as UPS International. If you cannot see a rate at checkout, please contact us.
Delivery further information
The delivery charge is automatically added to your order and you will see the total amount you have to pay before you confirm the order. Unfortunately we have to charge carriage but we do attempt to keep it to a minimum where possible
All orders leaving us require a signature, and the delivery could take place any time between 8am and 6pm depending on the courier used. If you are liable to be out, please give an alternative delivery address or type instructions into the notes section as you place your order.
Standard Service; We will aim to dispatch goods within 3 working days. Delivery on the standard service is via courier, will require a signature and we aim to deliver within 5 working days. This service will only arrive on working days.
Courier delivery; The majority of our parcels will be sent via a courier, the bulk of which are with APC Streetwise. Please be aware that they advertise their delivery times as anywhere between 8am - 6pm Monday to Friday. We are not able to dictate to them a time slot. And in most cases a signature will be required.
New! For 2020 – Putney EmbankmentClick & Collect service; New for 2020 finds our first ever collection point on the Putney Embankment. Please select Pick Up at checkout to activate the service
NB; For orders to mainland Europe and Rest of World, the cost for carriage is calculated on order package weight and final destination. The price given at checkout is a guide only and an accurate postage cost will be calculated and invoiced to you if a supplement is required. If you would like to know this figure before despatch please feel free to contact us for a quote. Please be advised that if your order is sent via courier outside of the EU you may need to pay for import/custom taxes after the order has been delivered to you. This is standard procedure by the courier to ensure that your order is delivered to you as soon as possible and not delayed in customs. These charges are solely dependent on your local customs office and the courier, we have no control over these charges. We would kindly suggest contacting your local customs office for more information and advice. Additional charges for customs clearance must be borne by you; unfortunately, we have no control over these charges and cannot predict what they may be. We are unable to reimburse any costs incurred regardless of the circumstances.
ANTIFOUL & PAINT ORDERS; Please be aware that we can only send antifoul & Paint products within GB Mainland. We CANNOT send antifoul & paint outside of GB Mainland. If you have any questions regarding this please feel free to contact our Mail order department.
LIFEJACKETS & CO2 CANNISTERS; Please be aware that we cannot currently send lifejackets with CO2 cannisters included outside of GB Mainland
LIQUIDS & CHEMICALS; Please note we are unable to deliver liquids or chemicals overseas or to highlands and island addresses. We will also have to use a courier service within GB Mainland for liquids or chemicals.
SALE OF KNIVES; In accordance with UK Law (The Offensive Weapons Act 1996), we are unable to sell knives to anyone under 18 years of age. We are unable to send knives to overseas destinations. You must upload a copy of a valid identity document to your order at time of ordering or your order will be cancelled. Knives must be sent on a signature courier service. Valid forms of ID are EU Passports, EU Photocard Driving Licence, MOD Form 90 ID Card, EU Member State National Identity Card, “PASS” ID Cards.
Last Updated 2nd September 2020
Our returns policy on items shipped within the UK is as follows:
To qualify for a refund you have 14 days from receipt of your order to notify us that you wish to cancel the order and return the goods. You then have 14 days to return the goods to us at your own expense. If you fail to notify us of your desire to cancel the order and return the goods within 14 days of receipt you are not entitled to a refund. If you do not return the goods to us within 14 days after notification you are not entitled to a refund.
Your items should be unused and in the same condition as received. They should also be in the original packaging.
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
If goods are faulty or damaged on receipt we will ask for photographic evidence of the fault or damage where feasible.
To read our full returns and exchanges policy, please click here.
Overseas orders may be refunded if the item is returned but we cannot refund the cost of shipping.