Westerbeke 12.5 BTDA - Generator Frequency Adjustment (Hertz); Drive Belt Adjustment

ENGINE ADJUSTMENTS
11011: WESTERBEKE recommends that the following engine
adjustments be perftmned by a competent engine mechanic. The .
infomtiltioo be.low iS Provided to assist the mechanic.
IBEIIATORFREQUEICY- (IIR1Z)
Once•lh¢~tg~~~~~ht~.
there may be adjusttnents required for e~ne·•spmi·~)
during the engine's break"in peri<Jd·(mst SO~).or .• af!er
this period. AJlO..Ioad y~adj~t._y •. be
required in oonj~AllCtion with tbe engine~s speed ~t
These are not. warrantable. adjustments as ·~••rdale to
llOllllal break-in~ maintenance. · ····.·•· ·... '· .·
Frequency is a direct result of engine/generator speed • .·.
indicated by tbe followU)g: · ·
Wben tbe ~~ isnmattSOOf111u.tJJe:4Cw~
voltage freqlleJley is 60herlz. . . . . . ... . . .· •.• · .•.. •·· •.... . . . . ·
When tbe generator is nm at lSOO rpcn. tile ~C -~t
· voltage frequeaq is SO laertz. · · · ·
1. Connect tbe AC output~ to the: AC~tlal·b~in
accordance withAC \bltage ~-.diagmm
specified for yoor genenuor sea. Which .. ~ hl•tlle·· •
BT GENERATOR sed;i~oflhis manual. . . .
2. Adjust tbe engine's speed toObtaiatbe ~
COJ:teSpooditig to tbe vot.a,e selected. by ex~ or
shortening tbe Throttle j\dj~~, . .sure
the solenoid's plunger is com~ly ~ the
solenoid. · · ·
Failure of the solenoid to botto1n in the ~ will
result in a failed solenoid.
To avoid.failure of the solenoid. efis1d .. the soienbid
plunger bottoms in tbe SQ)eooid. ~the soleooid•s
operation at the initial start-up. Periodiadly lUbricated ·
linkage joints between llle solenoid plunger Md the
throttle joints between the solenoid plunger~ the
throttle ·arm will eliminate bjnding. · · ·
DRIVE BEl.tADJUS'fiVJa!T
A CAUTION: Drive belts must b{l prtJperly
tensioned; Loose drfrle belt$ Will not providl,prtJ/J(Ir .
alternator charglnga/ld will eveniiJ.ally damage the ..
alternator~
Drive bela that are too tight will pill/ the alternator
out of alignment and/or callse.tlle alternator Ill wear
out prematurely.
Belt tension adjustmentis made b)' pivoting th~
altemator on its base mounting bolt.
1. Lcosen the ~ternator adjusting strap bolt and the base
mounting bolt.
2. Pivot the alternator on the base ~ountiDg bolt to the
left or right as required.
IOTE: The solenoid plunger must move smoothly and
rapidly into the solenoid when the solenoid is electrically
energized. drawing the engines throttle ann into the
Set Speed/RJm Position.
'fo arrive ~ tbe appropriate frequency, ei.ther monitor the
sPeed,.of'the engine/generator with a tachometer or
monitor !be frequency with a frequency meter. The latter
method being the more precise of the two.
3. Tighten the base mounting bolt and the adjusting
strap bolt.
4. Operate the engine for about 5 minutes at idle, then
shut down and recheck belt tension.
BaT TENSION