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If your Mfgr. says:

That motor's 7 years old!!
Part is no longer available.
We lose $$ on service!
EPA made me do it!
Part's at central warehouse, you'll get it next month.
We don't make parts for those.
We only do warranty work.
Our techs only fix late models.
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OMC STRINGER (400/800) DRIVES

TUNE-UP SPECS
THRU 1985-1/2 (1986)

OMC DISCONTINUED THE STRINGER DRIVES IN MID-YEAR 1985 WITH THE INTRODUCTION OF THE OMC COBRA DRIVES.
MANY WERE STILL MARKETED AS 1986 MODELS ALONG WITH THE NEW COBRA MODELS.


MODEL
HP		 C.I.D. MAKE FULL
THROTTLE
RPM RANGE		 POINT
GAP		 DWELL
+/- 2°		 INITIAL
TIMING
B.T.D.C.		 FIRING
ORDER		 IDLE
RPM		 SPARK
PLUG
GAP
80 91.5 FORD 4800-5200 .025 45° 10° 1-3-4-2 580 - 620 .025
88 / 90 89.5 OMC 4000-5000 no info no info no info 1-2-3-4 580 - 650 .030
90 97.5 FORD 4800-5200 .025 40° 8° 1-3-4-2 580 - 620 .025
100 153 CHEVY 4000-4400 .019 32° 4° 1-3-4-2 500 - 600 .030 - .035
110 153 CHEVY 3700-4100 .019 32° 4° 1-3-4-2 500 - 600 .030 - .035
120 153 CHEVY 4000-4400
(4200-4600 FOR
400 SERIES DRIVES)		 .019 32° 4° 1-3-4-2 500 - 600 .030 - .035
140 181 CHEVY 4000-4400
(4200-4600 FOR
400 SERIES DRIVES)		 .019 32° 4° 1-3-4-2 500 - 600 .030 - .035
150 225 BUICK 4000-4400 .016 30° 5° 1-6-5-4-3-2 500 - 600 .030 - .035
155 225 BUICK 4000-4400
(3800-42000 FOR
A & R2 MODELS)		 .016 30° 5° 1-6-5-4-3-2 500 - 600 .030 - .035
165 250 CHEVY 3800-4200 .019 32° 6° 1-5-3-6-2-4 500 - 600 .030 - .035
170 302 FORD 3800-4200 .014 - .019 31° 10° 1-5-4-2-6-3-7-8 500 - 600 .030 - .035
175 302 FORD 3800-4200 .014 - .019 31° 10° 1-5-4-2-6-3-7-8 500 - 600 .030 - .035
185 283 CHEVY 4000-4400 .018 30° 8° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
185 305 CHEVY 4000-4400 .018 30° 7° 1-8-4-3-6-5-7-2 500 - 600 * .030 - .035
190 302 FORD 3800-4200 .014 - .019 31° 10° 1-3-7-2-6-5-4-8 500 - 600 .030 - .035
200 300 BUICK 4000-4400 .016 30° 2.5° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
200 305 CHEVY 4200-4600 .018 30° 7° 1-8-4-3-6-5-7-2 500 - 600 * .030 - .035
210 283 CHEVY 4000-4400 .018 30° 8° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
210 307 CHEVY 4000-4400 .018 30° 4°  (69B, 69M)
10°  (19E)		 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
215 307 CHEVY 4000-4400 .018 30° 10° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
225 307 CHEVY 4000-4400 .018 30° 10° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
225 305 CHEVY 4000-4400 .018 30° 7° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
230 305 CHEVY 4200-4600 .018 30° 7° 1-8-4-3-6-5-7-2 500 - 600 * .030 - .035
235 307 CHEVY 4200-4600 .018 30° 3° 1-8-4-3-6-5-7-2 500 - 600 * .030 - .035
235 351 FORD 3800-4200 .014 - .019 31° 10° 1-3-7-2-6-5-4-8 500 - 600 .030 - .035
240 351 FORD 4000-4600 .014 - .019 31° 6° 1-3-7-2-6-5-4-8 500 - 600 * .030 - .035
245 307 CHEVY 4200-4600 .018 30° 10° 1-8-4-3-6-5-7-2 500 - 600 .030 - .035
250 351 FORD 4000-4400 .014 - .019 31° 6° 1-3-7-2-6-5-4-8 500 - 600 * .030 - .035
260 350 CHEVY 4200-4600 .018 30° 10° 1-8-4-3-6-5-7-2 500 - 600 * .030 - .035

*700 RPM with Shift Assist Kit (Electric Shift Models)
 
 

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The information provided on these pages is correct to the best of my knowledge, however the MasterTech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. This information is disseminated in good faith, however MasterTech assumes NO LIABILITY whatsoever in regard to this service. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. Changes are periodically added to the information herein. Mastertech may make improvements to this site at any time. Parts ordered from this website may or may not be in dealer stock at the time of order. Thank you for reading.


Revised