Home › Forum › Ask A Member › 7.5hp Merc Blue band thunderbolt ignition
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crosbyman.
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July 24, 2023 at 7:16 pm #278462
any info on these.. what year approx. anything to stay away from ??
sorry ser# not available..for now
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July 25, 2023 at 8:18 am #278475I think that from looking at your picture you have one of the newer versions of Thunderbolt with a switchbox, They are better than the earlier Phasemaker versions. Still….if yours needs ignition repair….the components are rather pricey.
Other issues common with all the smaller Mercs of that vintage are lower unit seal issues .
Very nice running engines however.
July 25, 2023 at 9:40 am #278480thanks fo info… the asking $$ is 100 CDN …it would be easy to spend even more if the ignition system is defective…If I go for it …. i’ll at least check for sparks. visually the whole engine looks very clean.
I have a nice 4hp with phasemaker ignition on my rig and to be honest it is a fine running engine. one cyl, one set of points that fires on closure. it runs all day long with no
hick-ups and a lot cheaper on fuel than my 9.5hp
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July 25, 2023 at 8:50 pm #278502The single cylinder Mercury engines with Phasemaker seem to fare better when it comes to stator failure,,,,,and it is rumored to be because the singles do not use a kill button.
If you have a Phasemaker Mercury……stop it with the choke.
July 29, 2023 at 2:18 pm #278641OK I picked it up for $100 cdn crossing fingers as this is my winter 23-24 project. Couple flaws .. missing a transom clamp and pad (big bolt presently) and the keel has 1-2 inches missing which I’ll reshape or get soldered if not to expensive ( possibly more that theengine 🙁 ) and if the motor is in working order…… after I am done fully inspecting and refurbishing. Needssome paint touch ups Merc Black
In any event it is a ” time spender” for me during long winter days … just to keep me busy day dreaming of fishing days to come.
if anyone has a spare handle and clamp…drop me PM 🙂
7.5hp ser# 7106835
happy days are back 🙂 I have enough E&J’s in the shed
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July 31, 2023 at 2:02 pm #278693Good motors, easy to work on, I’ve had 3.5,4,7.5,9.8 Mercs. In my book it’s the best fishing motor ever made. I got a 14ft Alumacraft Model A, anyone of those engines could plane that boat. I picked up a spare motor just for parts, lots of parts on those smaller mercs interchange with each other. There is no comparison to the Johnson. Gene.
July 31, 2023 at 8:36 pm #278702agree …my second motor in 1970s or so was a 9.8 till I sold it years later. Currently running a 4hp on my rig (great troller) I got a sailboat 4hp and a 3.9hp in the shed waiting to go for a swim….and now this 7.5hp project.
I just need more boats and time
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