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VacuumMate 

Allweather

 

The complete Intake Vacuum Synchroniser with Dynamic Engine Check & RPM 

 

Read the whole of this manual before starting to use the VacuumMate 

 

1. OVERVIEW 

 

VacuumMate

’s 3-in-1 functions are all essential for rapid, precise and reliable intake synchronising.   

 
Use the 

RPM

 mode for the essential adjustment of the engine speed to the correct value as stipulated 

by the constructor, prior to and after synchronising. (No need for a separate tachometer instrument or 
the need to rely on vehicle tachometers, usually imprecise at low-end engine speeds).  
Then accurately synchronise in the “

AVE

” mode to the constructor-specified value(s). If synchronising 

seems difficult to achieve, flick the selector switch over to the “

DYN

” mode for an immediate visual 

check that the cylinder seals and valves are functioning correctly. A valve leak or other sealing defect 
affecting the manifold pressure will thwart any attempt at a correct synchronisation of the relevant 
cylinder’s intake. 
More details of these three functions are given in the following sections of this manual. 
 
The 

purpose

 of "synchronising" throttle valves is to bring the average vacuum settings in the various 

intake channels as close to their specified values as possible.  Their specified values are (usually) 
equal  but for some engines one or more cylinders may need a slightly different value from the others 
for specific reasons such as differential heat expansion in control linkages of differing lengths. 

It is 

therefore essential to consult the service manual

. Precise adjustments are essential to ensure a 

stable engine idle speed and a good engine response.  
 

VacuumMate

 has four highly visible LED bar-graph displays for monitoring up to 4 channels (or 4 

cylinders). These fast, precise & frictionless columnar displays replace outdated toxic mercury columns. 
 

VacuumMate

’s compact size & weight allows use anywhere, whether in the workshop or at the track – 

the ideal tool for the professional mechanic, for power sports vehicles, 4-stroke outboard motors and  
multi-carburettor classic sports cars. The bright protective holder and custom storage and travel case 
lend added protection to the robust  water- and shock-resistant construction. 
 
The VacuumMate 

VMR6ME

 model has an internal rechargeable 7,2V NiMH battery, ideal for outdoor 

use, for example on outboard motors on board boats. The battery can be recharged simply by 
connecting to an external charged 12V vehicle or storage battery. 
 
In addition to it’s protective holder and custom travel case, the 

VacuumMate

 kit includes the external  

battery cord-set, a fuel-line Tee-connector and 2 sets (of 4) unique “flexi-rigid” connection adapters 
with M5 & M6 threads for easy connections to all types of engines.  Additional connection adapters are 
readily available to order, (order references M5ADPFR & M6ADPFR respectively).  

 
Legend

 : 1) External battery connection cord-set. 2) Flexible (replaceable) santoprene hoses. 3) 2 sets 

flexi-rigid adapters.    4) 4 LED-array displays. 5) 3 graduated “AVE” mode scales. 6) RPM scale.   
7) Low battery warning LED.  8) Function switch RPM / VAC. 9) Scale range switch, AVE mode.  
10) Function switch AVE / DYN.  11) RPM selector switch for 2-stroke/4-stroke engines. 12) Storage 
case. 13) Switch for selection of internal battery  & to reset to “ON” (model with internal battery only). 
14) Optional StandMate custom mobile stand for VacuumMate, IgnitionMate. 

1

 

 

 

Содержание VacuumMate Allweather

Страница 1: ... a stable engine idle speed and a good engine response VacuumMate has four highly visible LED bar graph displays for monitoring up to 4 channels or 4 cylinders These fast precise frictionless columnar displays replace outdated toxic mercury columns VacuumMate s compact size weight allows use anywhere whether in the workshop or at the track the ideal tool for the professional mechanic for power spo...

Страница 2: ...lack the speed precision needed to follow DYNAMICALLY the very fast fluctuations of the vacuum waveforms themselves so as to monitor the heights and relative positions of the crests and troughs of the waveforms of each cylinder And it is only by monitoring and displaying these DYNAMIC characteristics that one can reveal the existence and nature of engine seal defects which will distort thwart atte...

Страница 3: ...pletion of the synchronising task The RPM mode displays engine speeds from 500 to 2500 rpm with 50 rpm resolution The 2 stroke 4 stroke selector switch 11 illustration inside front cover allows correctly displayed values for both types of engine Incorrect selection will display either double the true RPM 4 stroke selected for 2 stroke or half of it 2 stroke selected for 4 stroke 5 POWERING THE VAC...

Страница 4: ...e fitted to external nipples protruding from the enclosure The VacuumMate hoses are oil fuel resistant and any replacement hoses should be of a similar specification You are advised to replace hoses only with original VacuumMate replacement hoses available individually order reference VMHOSE see 9 SERVICE The SERVICE MANUAL of the engine manufacturer should indicate where to make the necessary hos...

Страница 5: ...to keep fuel flowing illustrated above the MityVac 4000 available from VacuumMate distributors The advantage in this case is that there is no influence of the fuel valve on the vacuum readings 7 HOW TO PROCEED To start Make the necessary pneumatic connections It is best to connect the channel 1 hose first Start the engine and let it warm up Connect the VMR6WS to a suitable battery or dc electrical...

Страница 6: ...lly you should start adjusting the carburettor next to the fixed one The object is to achieve the same reading on each of the channels during idling unless the values specified for a particular engine are slightly different for specific cylinder manifolds Some examples of such engines 4 stroke Mercury and Yamaha outboard motors Honda s VFR800 motorcycle engine Start with the scale range switch in ...

Страница 7: ... air entering the intake system Compression loss Background information The diagrams below show some more realistic examples of pressure waveforms which can occur in the intake manifold of a 4 stroke engine Compare with the drawings on page 2 The pressure scale orientation has been deliberately inverted so as to rather show vacuum scale so as to correlate with the LED displays of the VacuumMate Th...

Страница 8: ...re are no scale markings for the DYN mode as the purpose is not to measure but rather to compare the connected channels A light column extending downwards into the P zone below the Pa level means POSITIVE pressure higher than atmospheric upwards into the P zone means vacuum Some abnormal display patterns are shown above centre and right The nature of the waveform anomaly reveals the nature of the ...

Страница 9: ...ontinuously connected with the intake system During the combustion cycle a high pressure wave will blow back to the carburettor creating positive pressure in the intake manifold The trough of the vacuum wave form the low point of the displayed dynamic band of that cylinder will move under the Pa line towards the P side reflecting this positive pressure EXAMPLE 2 LEAKING INTAKE VALVE The normal wav...

Страница 10: ...absolutely sure there is no water inside the unit or in or around the DC power inlet In case of malfunction following immersion please return to your distributor for checking and repair Calibration This instrument has been carefully checked and calibrated at the factory and in normal use calibrates itself automatically against day to day changes in barometric pressure However after a time gradual ...

Страница 11: ...otentiometers Adjust ONLY the 8 trimmers grouped in 4 pairs on the right Do NOT adjust the other trimmers The calibration trimmer positions are marked on the lower edge of the control panel HOW TO CALIBRATE PROCEDURE Select VAC 35 55 cm Hg and AVE with the switches on the control panel Create a vacuum of 70kPa 700mBar 52 5cmHg with the hand operated vacuum pump Adjust the SPAN trimmers until 52 5c...

Страница 12: ...tion special accessory for calibrating VMLFIXADP5 Permanent E Z fix connection adapter with 40 cm hose M5 thread VMLFIXADP6 Permanent E Z fix connection adapter with 40 cm hose M6 thread VMSFIXADP5 Permanent E Z fix connection adapter without hose M5 thread VMSFIXADP6 Permanent E Z fix connection adapter without hose M6 thread Limited Warranty VacuumMate is guaranteed against defects in manufactur...

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