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10-12-2018, 06:35 PM #1
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1992 V-175 2.5L carb., mid-range stutter?
Hi all, first post. Serial D 122592, under 200 hours. Stutters from 1100 rpm through 2800 rpm. New motor to me, starts and runs great, strong on the top end, just this frustrating mid-range problem. I have replaced the plug wires and plugs. Examined the coils for cracks. Bought and read repair manual. Planning on fuel line replacement and compression test. My best guess is mid-range jet in one of the carbs is clogged. Ideas?
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10-13-2018, 11:16 AM #2
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Guess I really did not say it, but am hoping to get a few ideas from experienced people about what might be causing the stutter. Thanks! (I am not that familiar with forms)
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10-14-2018, 07:31 AM #3
Screaming And Flying!
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Need to start by cleanings carbs and a spark test
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10-14-2018, 10:58 AM #4
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Thanks Merc 2.5 really appreciate the help. I will order Sierra carb kit. How will I do the spark test?
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10-14-2018, 11:20 AM #5
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Which carbs are these?
Last edited by BobBob; 10-14-2018 at 12:19 PM. Reason: 2nd try
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10-14-2018, 11:31 AM #6
Screaming And Flying!
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Do a complete Link & Sync.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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BobBob thanked for this post
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10-14-2018, 11:40 AM #7
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Cant pull up the pic
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10-14-2018, 12:20 PM #8
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Reposted pics
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10-14-2018, 12:24 PM #9
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Look like wmh carbs
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10-14-2018, 12:26 PM #10
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Sry I just seen the pic with it in there.
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10-14-2018, 12:29 PM #11
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How do I do the spark test?
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10-14-2018, 12:32 PM #12
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Local auto parts should have a spark tester u can buy or you can pull plug wire at idle to see if sound of motor changes
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10-14-2018, 12:36 PM #13
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Thanks guys, I will rebuild carbs and fuel pump and let you know. Really appreciate the help!
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10-27-2018, 08:28 PM #14
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Update:
I changed fuel line, rebuilt carbs and fuel pump. Did a spark test and link and sync.
Started and ran rough. Set the idle air screws for best idle.
After it warmed up IT RAN GREAT!
My thanks to Merc 2.5 and Dave Strong.
this website is life saver.
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