Model Engine Tests

Early Enya Screws

(Cross Flow Engines)
This list compiled by Bob Allan
 

Standard screws listed as M3 x 0.6 are JIS (Japanese Industrial Standard) and are almost impossible to find while World standard (ISO) is M3 x 0.5
Both World and JIS standard for M3.5 is 0.6mm so damaged/lost M3 x 0.6 screws can be replaced with common M3.5 x 0.6 screws by drilling out with a 2.9mm (#33) drill and retapping.

Engine                 Head                       Frt. Hsg          Standard (3)         Comments

Screws  Screws
 
.09 3001         M2.5 X 0.45          M2.5 X 0.45          ISO                      Nickel slotted
.09 II              M2.5 X 0.45          M2.5 X 0.45          ISO                       Nickel slotted
.09 III             M2.5 X 0.45          M2.5 X 0.45          ISO                      Nickel Phillips
.09 IV             M 2.5 X 0.45         M2.5 X 0.45          ISO                      Black Phillips
.09S Quicky   M3 X 0.6                M3 X 0.6              JIS                        Black Phillips
.15 3101         M3 X 0.6                M3 X 0.6              JIS                        Nickel Phillips
.15 II              M3 X 0.6                M3 X 0.6              JIS                        Nickel Phillips
.15 III             M3 X 0.6                M3 X 0.6              JIS                        Black Phillips
.15 IV             M3 X 0.6                M3 X 0.6              JIS                        Black Phillips
.15 V              M3 X 0.6                M3 X 0.6              JIS                        Black Phillips
.15 D              M3 X 0.6              M3 X 0.6                JIS                        Nickel slotted
                  .19 3-Bolt       M3 X 0.6              M3 X 0.6                JIS                        Natural slotted Fil. Hd. (1)
.19 3-Bolt       M3 X 0.6              M3 X 0.6                JIS                        Nickel slotted
.19 II              M3 X 0.6              M3 X 0.6                JIS                         Nickel slotted
.19 III             M3 X 0.6              M3 X 0.6                JIS                         Nickel slotted
.19 IV             M3 X 0.6              M3 X 0.6                JIS                         Black Phillips
.19 V              M3 X 0.6              M3 X 0.6                 JIS                        Black Phillips
.19 V BB        M3 X 0.6              M3.5 X 0.6             JIS/ISO                 Black Phillips
.19 VI             M3 X 0.6              M3 X 0.6                JIS                        Black Phillips
.19 VI BB       M3 X 0.6             M3.5 X 0.6             JIS/ISO                  Black Phillips
.29 RH           M3 X 0.6              M3 X 0.6                JIS                         Nickel slotted
.29 II              M3 X 0.6              M3 X 0.6                JIS                         Nickel slotted
.29 III            M3 X 0.6              M3 X 0.6                 JIS                         Nickel Phillips
.29 III Spec.   M3 X 0.6             M3 X 0.6                 JIS                         Nickel Phillips
.29 IV             M3 X 0.6 `           M3.5 X 0.6             JIS/ISO                   Black Phillips
.29 IV BB       M3 X 0.6             M3.5 X 0.6             JIS/ISO                   Black Phillips
.29 V              M3 X 0.6             M3.5 X 0.6              JIS/ISO                   Black Phillips
.36                  M3 X 0.6             M3 X 0.6                 JIS                          Nickel slotted
.35                  M3 X 0.6             M3 X 0.6                 JIS                          Nickel Phillips
.35 II              M3 X 0.6             M3 X 0.6                 JIS                          Nickel Phillips
.35 IV             M3 X 0.6             M3.5 X 0.6              JIS/ISO                  Black Phillips
.35 IV BB       M3 X 0.6             M3.5 X 0.6              JIS/ISO                  Black Phillips
.35 V              M3 X 0.6             M3.5 X 0.6              JIS/ISO                   Black Phillips
.40 6002         M3.5 X 0.6          M3.5 X 0.6              JIS/ISO                   Black Phillips
.45 6001         M3 X 0.6             M3 X 0.6                 JIS                          Nickel Phillips
.45 BB           M3 X 0.6             M3.5 X 0.6              JIS/ISO                   Black Phillips
.45 II              M3.5 X 0.6         M3.5 X 0.6               JIS/ISO                   Black Phillips
      60/63 SC        M3 X 0.6            M3 X 0.6                  JIS                          Nickel slotted (2)
60 II               M3.5 X 0.6          M3.5 X 0.6              JIS/ISO                   Black Phillips
60 III              M3.5 X 0.6          M3.5 X 0.6              JIS/ISO                   Black Phillips

Special Note  re. the 15 Diesel screws  -  the Mk. 1 had all slotted, the Mk. 2 came with slotted or Phillips or a mix of both ( the Mk. 2 15 Diesel being produced over a much longer period of time ). Unlike all other Enya’s listed here, the 15 Diesel’s also needed 4 long head bolts to tie the separate cooling fins down, the one situated in the exhaust stack being longer than the other three.

1. The early 19 3-Bolt 7 fin head engine had Fillister head natural steel screws; the rest of the 19 3-Bolt engines had slotted Nickel plated Pan Head screws.
2. The 60 Typhoon Marine engines have M3 slotted Nickel plated head screws, and M3 Phillips Nickel plated front housing screws.
3. Japanese Industrial Standard screws are not readily available outside of Japan.
4. The factory started changing from the nickel plated slotted screws, to the nickel plated Phillips around 1957. As well, the change to black Phillips screws started around 1964 / 65.

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