Rotax 914 F User Manual

Reference
Modification no.
- 0 -
Page
261
Date
1997 02 01
Main
914 F
01480
15)Wear limits for ROTAX 914 F
Designation new wear limit actual dim.
mm (in.) mm (in.) int. / exh.
Cylinder/Piston
cylinder bore Cyl. 1............................... 79,50 ÷ 79,524 (3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
ovality ..................................................... 0,000 ÷ 0,007 (0,000÷ 0,0003)........... 0,05 (0,002) ........................
conicity ................................................... 0,000 ÷ 0,030 (0,000÷ 0,001) ............ 0,06 (0,002) ........................
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515 (3,130÷ 3,131) .......... 79,39 (3,126) ........................
piston to cylinder clearance .................... 0,000 ÷ 0,020 (0,000÷0,0008) ............ 0,13 (0,005) ........................
cylinder bore Cyl. 2............................... 79,50 ÷ 79,524 (3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
ovality ..................................................... 0,000 ÷ 0,007 (0,000÷ 0,0003)........... 0,05 (0,002) ........................
conicity ................................................... 0,000 ÷ 0,030 (0,000÷ 0,001) ............ 0,06 (0,002) ........................
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515 (3,130÷ 3,131) .......... 79,39 (3,126) ........................
piston to cylinder clearance .................... 0,000 ÷ 0,020 (0,000÷0,0008) ............ 0,13 (0,005) ........................
cylinder bore Cyl. 3............................... 79,50 ÷ 79,524 (3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
ovality ..................................................... 0,000 ÷ 0,007 (0,000÷ 0,0003)........... 0,05 (0,002) ........................
conicity ................................................... 0,000 ÷ 0,030 (0,000÷ 0,001) ............ 0,06 (0,002) ........................
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515 (3,130÷ 3,131) .......... 79,39 (3,126) ........................
piston to cylinder clearance .................... 0,000 ÷ 0,020 (0,000÷0,0008) ............ 0,13 (0,005) ........................
cylinder bore Cyl. 4............................... 79,50 ÷ 79,524 (3,13 ÷ 3,131) .......... 79,58 (3,13) ..........................
ovality ..................................................... 0,000 ÷ 0,007 (0,000÷ 0,0003)........... 0,05 (0,002) ........................
conicity ................................................... 0,000 ÷ 0,030 (0,000÷ 0,001) ............ 0,06 (0,002) ........................
piston dia. (at height 15 mm) D .......... 79,495 ÷ 79,515 (3,130÷ 3,131) .......... 79,39 (3,126) ........................
piston to cylinder clearance .................... 0,000 ÷ 0,020 (0,000÷0,0008) ............ 0,13 (0,005) ........................
piston pin bore Cyl. 1............................ 20,001 ÷ 20,005 (0,7874÷0,7876) ........ 20,04 (0,789) ........................
piston pin .............................................. 19,992 ÷ 19,995 (0,7870÷0,7872) ........ 19,97 (0,786) ........................
clearance, pin in piston ........................... 0,006 ÷ 0,013 (0,0002÷0,0005) .......... 0,05 (0,002) ........................
con-rod bore, small end ........................ 20,010 ÷ 20,020 (0,787÷ 0,788) .......... 20,04 (0,789) ........................
clearance, pin in con-rod......................... 0,015 ÷ 0,028 (0,0006÷0,001) ............ 0,05 (0,002) ........................
piston pin bore Cyl. 2............................ 20,001 ÷ 20,005 (0,7874÷0,7876) ........ 20,04 (0,789) ........................
piston pin .............................................. 19,992 ÷ 19,995 (0,7870÷0,7872) ........ 19,97 (0,786) ........................
clearance, pin in piston ........................... 0,006 ÷ 0,013 (0,0002÷0,0005) .......... 0,05 (0,002) ........................
con-rod bore, small end ........................ 20,010 ÷ 20,020 (0,787÷ 0,788) .......... 20,04 (0,789) ........................
clearance, pin in con-rod......................... 0,015 ÷ 0,028 (0,0006÷0,001) ............ 0,05 (0,002) ........................
piston pin bore Cyl. 3............................ 20,001 ÷ 20,005 (0,7874÷0,7876) ........ 20,04 (0,789) ........................
piston pin .............................................. 19,992 ÷ 19,995 (0,7870÷0,7872) ........ 19,97 (0,786) ........................
clearance, pin in piston ........................... 0,006 ÷ 0,013 (0,0002÷0,0005) .......... 0,05 (0,002) ........................
con-rod bore, small end ........................ 20,010 ÷ 20,020 (0,787÷ 0,788) .......... 20,04 (0,789) ........................
clearance, pin in con-rod......................... 0,015 ÷ 0,028 (0,0006÷0,001) ............ 0,05 (0,002) ........................
piston pin bore Cyl. 4............................ 20,001 ÷ 20,005 (0,7874÷0,7876) ........ 20,04 (0,789) ........................
piston pin .............................................. 19,992 ÷ 19,995 (0,7870÷0,7872) ........ 19,97 (0,786) ........................
clearance, pin in piston ........................... 0,006 ÷ 0,013 (0,0002÷0,0005) .......... 0,05 (0,002) ........................
con-rod bore, small end ........................ 20,010 ÷ 20,020 (0,787÷ 0,788) .......... 20,04 (0,789) ........................
clearance, pin in con-rod......................... 0,015 ÷ 0,028 (0,0006÷0,001) ............ 0,05 (0,002) ........................
Piston rings, Cyl.1
1
st
compression ring
height of groove ...................................... 1,52 ÷ 1,54 (0,059÷0,061) .............. 1,6 (0,063) ........................
height of ring ........................................... 1,478 ÷ 1,49 (0,058÷0,059) .............. 1,45 (0,057) ........................
ring / groove clearance ........................... 0,03 ÷ 0,062 (0,001÷0,002) .............. 0,1 (0,004) ........................
ring end gap F ....................................... 0,15 ÷ 0,35 (0,006÷0,014) .............. 1,0 (0,04) ..........................

Rotax 914 F Specifications

General

Brand	Rotax
Model	914 F
Category	Engine
Language	English