tec h40 and h70's

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  #1  
Old 02-27-03, 12:51 PM
diydoordie
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tec h40 and h70's

i need the bore size and timing # for a 4--5 and 7 hp horizontals.i timed the h70 to 90 btdc but then i have 2 other references that say 50 btdc and a wall chart that says 50 btdc>>. appreciate the help. steve
 
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  #2  
Old 02-27-03, 05:02 PM
Tcumcman
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Timing Specs

Best thing to do is get a 3-10HP repair manual (Part#740049 or
692509) which will have this information in it. Here's a re-cap
for now of what you asked about:

H40 .050 BTDC
HS40 .035 BTDC
HS50 .035 BTDC
H50 .080 BTDC
H60 .080 BTDC
H70 .080 BTDC w/2.750" cylinder bore
HM70 .090 BTDC
H70 .090 BTDC w/3.060" cylinder bore

Tcumcman
 
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