View Full Version : General Q & A




  1. Holley fuel pump safety switch 12-810. 2 bad in one year.
  2. Engine Rebuilding
  3. header friendly sub for r44xls
  4. HELP PLEASE....Thoughts on repowering
  5. Roots Blower Sizing
  6. Engine Pre lube systems
  7. boat vapor locked after taking off fuel filter/water seperator
  8. company to handle blower DIS/REassembly and powdercoating?
  9. Gen 6 Heads on a Mk 4 Block
  10. Ebay water jacketed headers?
  11. Innovative Wideband A/F system - cable too short
  12. Revolution Marine Oil Reservoir
  13. Oil pressure safety
  14. Winter upgrades, LEDs, underwater lights, etc
  15. My quest for 60 MPH
  16. Stock power to Ilmor swap
  17. Outboard motor question
  18. Merc Racing 575 SCI running very rough/rich
  19. Kaama Question?
  20. Winterizing Question- Looking for Ideas
  21. Fuel stabablizer
  22. Fuel Filter
  23. 1988 Merc 420's
  24. Gas Ssteam Out Of Whipple Chargers
  25. Gauges Cycle/Sweep
  26. piston coatings
  27. merc twins 496HO will not exceed 2800
  28. Merlin heads
  29. Valve Springs & Rocker Arms - 525EFI's ???
  30. Exhaust Replacement ?
  31. Can we change our S/N
  32. Max safe RPM?
  33. changing throttle shifter configeration on Gaffrig
  34. What's a 502 block worth
  35. Gen 3 Cool Fuel Winterization?
  36. 496 ecm
  37. Found external leak on manifold - crack
  38. milkshake under stbd valve cover, hi water temp on the port side of the block.
  39. Looking for a Twin Disk mechanic
  40. sonic prowler 496HO PCM PROBELM??
  41. Machine shop in SouthEast Michigan
  42. Can I start the engines on the hose with the drives off?
  43. Hawk 525sc's
  44. Secondary idle screw adjustment on quick fuel 1050?
  45. Gen6 cylinder bore question max bore?
  46. 525 rebuilds with 250 hours
  47. Another bad motor
  48. Stainless marine gen 3 gaskets
  49. Power steering fluid tempature.
  50. Why do larger roots blowers use 2 carbs?
  51. Oil temp problem in my 572, need input/advice....
  52. Finally got a new tow rig! (any other 8.1 owners out there?)
  53. Need Boat Mechanic / Engine Builder in Palm Beach Area
  54. Smartcraft and gauges ?
  55. 598 build questions
  56. Profile picture
  57. Timing a custom supercharged engine
  58. gas tank
  59. Smoked 502 tonite
  60. Bbc with v6 module??
  61. Phenomenal experinece with MarineEngine.com
  62. Need engine advice N A 598 cubic inch rebuild
  63. 700 sci - over heat at high rpm only
  64. Twin Turbo Build
  65. Water Press. location
  66. Exhaust manifold differences 502 vs 525 efi
  67. Another Engine Dynoed today.
  68. WTF Did I Just Do. Considering a Formula 400 SS
  69. 33 Baja outlaw vs 32 fountain fever
  70. SBC Built, now looking for jet recommendations
  71. 502efi
  72. 525EFI Warm start problem - ??
  73. 29 fever triple digits
  74. Who makes the Black Thunder?
  75. Little help if possible
  76. Remote oil filter mounting heigth?
  77. Vibration above 4200
  78. Bravo1 drive goes down, but won't go up.
  79. What muffler / silence are these?
  80. big cubic inch chevy?s
  81. Sea Water Pump Pulley?
  82. 502 EFI, spark coming out of the coil, no spark at the spark plugs
  83. Thunderbolt IV sensors
  84. Twin engine boat porposing problem
  85. New Merc 540 replacement engine
  86. Inexpensive 454 mag performance up grades
  87. 500 efi upgrades
  88. Bennett trim tabs
  89. What problems to look for on Merc 700's
  90. Need some help with engine replacement
  91. Cam guru's please read
  92. Question On Coated Pistons
  93. big block chevy correct spark plugs
  94. Bbc valve cover question-hardin extreme
  95. Bravo upper internal plug?
  96. 502 HO Mag questions
  97. Mercury Outboard Mechanic
  98. Recurring gauge problem - 525EFI
  99. Stroker fuel injection
  100. Wet Exhaust to Dry Exhaust
  101. Windshield for a 2003 HTM 24ss???
  102. Mefi 1 to mefi 3 question
  103. The Blower Shop Intercoolers WTF!!!
  104. single SSM 6 drive height? Or who to call?
  105. Weird 525EFI Question
  106. Gimbal housing help needed
  107. 502 Merc parts ID
  108. Trim Tab Advice??
  109. merc mefi 3 question
  110. Transom that was mounted with an X drive mounting a Bravo 1 question
  111. 496 HO 152 IAC Output Code
  112. who do i contact to fix my username to post a classified ad
  113. 1997 502 EFI cranks but won't start, will try and run after shot of starter fluid
  114. Fuel System Fittings
  115. 377 flywheel
  116. 496 HO maintenance while replacing transom assembly
  117. What are they worth?
  118. Vibration on down trim
  119. Where to purchase oil coolers and hardware
  120. 525efi rev limiter
  121. prop changes from 1.5 to 1.36
  122. 1999 Merc 454 mag ign issues
  123. motors bogging ? fuel pressure maybe?
  124. Engine Quest/RHS 320 Iron heads
  125. Starving for fuel...
  126. Can These Be Repaired ????
  127. QUICKSILVER SBC long block assembly worth building?
  128. I need to find a good shop in the Gulf Shores, Al or Pensacola, Fl area
  129. Aluminum Head Exchange to Steel Head
  130. Prop shaft carrier bearing stuck
  131. Aluminum Head Repair
  132. how hard is it to mefi tune my own after i install procharger
  133. 5 blade on 2004 288 sunsation
  134. Value Of a 91 Mark IV 502 Mag
  135. dry exhaust
  136. Volvo Penta 7.4 Gi vs GSi rev limiter
  137. tall deck to short deck exhaust problems
  138. Opening a can of worms
  139. merc xr gear pinion
  140. Trying to identify a pair of Mercury OB's
  141. Front Seal Unazzed
  142. 1998 Mercury 250 EFI
  143. 496 with whipple worth
  144. 350 mpi possable reversion
  145. Carbed 502/502HP fueling issues on 1996 Baja 272 Islander
  146. 502 magnum mpi IAC crossover
  147. Wrong oil?
  148. 454 Baja overheating
  149. Anyone know how too get ahold of mr gadgets?????
  150. Felpro 17042 vs 17046
  151. Roots Supercharger experts Snout problems
  152. 500efi - starter burned up + more - Help!
  153. Fuel supply issues
  154. Checkmate 251 Convincor vs Profile 26
  155. 1989 Power Play Conquest Decals
  156. Latham Steering Leak
  157. 502 EFI shutting down after 5 seconds of run time
  158. Part numbers question
  159. Volvo Duo prop
  160. Hp 500 carb setup help
  161. One exhaust is only shooting out water
  162. HP500 boost question
  163. Help 502 EFI stalls out
  164. 1996 HP 500 Carb lifter part numbers
  165. Removing CATs on new 8.2L motor
  166. Low oil pressure and Oil cooler questions
  167. Ram air
  168. Mayfair Hydraulic Steering Ram Rebuild help.
  169. 2001 555 PCM to mefi 3
  170. motor not hitting WOT?
  171. Need help with engine issue
  172. Knock came and knock left
  173. Paging skater Scott 36
  174. Mercruiser 496 ho overspeed code
  175. Raymarine DVD
  176. A little roots blower info.
  177. Can you please direct me to some Velvet Drive Identification information.
  178. Are my 454's magnum's??
  179. which fuel transfer pump to use ?
  180. 500 efi fuel fouling plugs
  181. 525EFI Header Failures - CMI vs Hardin - All failing
  182. Mercruiser Computer Programming
  183. 525 EFI sea pump stops pumping
  184. Fuel Pressure
  185. Should I scrap my anti-spam valves?
  186. 088 heads on gen 5 454 ?
  187. Trim and Tilt Pumps, why is one so much faster??
  188. what is killing my fuel pumps?
  189. SBC to BBC Conversion Questions
  190. Bilge pump in Fountain left running dry- are they toast?
  191. solenoid or trim pump bad?
  192. Gaffrig controls neutral safety switch
  193. 600SCI Gurus Needed -- No BOOST
  194. 088 Heads Max lift?
  195. adding 174 blower
  196. 502 Mag Removal
  197. 525 Header issue; I'm stumped..
  198. Top speed and cruise speed and gearing advice new to forum
  199. Pump for toilette and post-swim hotwash
  200. What Size Carb.
  201. Anybody use these boat dollies?
  202. Looking for advice
  203. SSM V alignment tool
  204. Starboard motor won't start - electrical, fuel?
  205. Mirage won't plane off
  206. Can anyone help identify this boat, and help provide feedback on possible purchase.
  207. 500 EFI Fuel Line longevity
  208. Cigarette 20 Update
  209. Fuel feed issues
  210. Time to replace fuel lines?
  211. Misfiring carb 502
  212. How much does Deck weigh on a Formula 302 SR1. I want to lift it to access stringers
  213. 525 EFI Alarm
  214. Noise when shifting
  215. 525 EFI H2O pressure?
  216. oil temp
  217. Merc 5.7 2bbl 1998 unique concerns.
  218. Replacing dipstick tube in 454
  219. Oil pressure problems!
  220. 454 to 502 repower suggestions
  221. PBM/Erson rods and cranks, comparable??
  222. 500efi overheating hot port header, help
  223. jet size
  224. Motor question for the Guru's...
  225. HP 500 carb fuel mech pumps
  226. Intake to head sealing issue question
  227. Collapsed lifter, bent pushrod
  228. anyone make hinge pin covers?
  229. Value 26 Prowler
  230. Ride quality older 38's which ones to look at
  231. need HEI DUI distributor info
  232. Hardin Marine - Hurricane Lite 525 Headers -- who's got 'em??
  233. solid or rubber prop hub???
  234. 525sc conversion
  235. 7.4 freshwater cooling
  236. Lower than I like Oil Pressure
  237. marine a/c units
  238. aftermarket mechanical fuel pump
  239. need help with code 42 on V6
  240. O2 guage
  241. Bravo 1 Vibration in forward drive not reverse??
  242. Dual trim pumps, one switch?
  243. Remote trim switches
  244. Reading Starts Me Thinking - More Power
  245. Water in fuel lean condition.
  246. Low oil pressure in brand new 502 efi
  247. Serpentine crossover kit
  248. power gone from my 8.2 mercuiser
  249. Moisture in valve covers with oil thermostat?
  250. Power steering leak
  251. 500HP carb- synthetic oil?
  252. oil spray from the front of a new 502 motor custom built
  253. Intake ?
  254. Swain Tech PC-9 Piston Skirt Coating
  255. 81 Formula, both alternators do not work?
  256. Water pump shaft seal
  257. Oil filled bilge - need advise please !
  258. how do you align an engine?
  259. efi vr carb
  260. Easiest way - converting 502 to EFI
  261. 502 mpi no inj. pulse on 1/2 the inj ?
  262. Fuel Injector Replace/Repair 805225A1
  263. Switch standard Bravo 1 to XR?
  264. has anyone ever powder coated blower pulleys
  265. PCM 555 codes
  266. 496 Mag HO front motor mount options?
  267. Camshaft sensor for 2001 496
  268. Murcury Racing HP500
  269. Old School HP500 water pump blown gasket (NOT SEA PUMP)
  270. Fuel tank level sender for formula needed
  271. Quietest thru transom exhaust setup
  272. Oil pressure gauge?
  273. Sloppy steering on bravo want to add hydraulic steering
  274. Which brand do you like?
  275. Merc 5.7 - 260hp
  276. Rapid beeping?
  277. Nordskog sending units?
  278. Autometer Gauge Connections
  279. prop slip?
  280. 781 heads best mods
  281. 38 Fountain fever wind deflecter /where to get one?
  282. How to tell the diffrence between a bravo 1 and 2
  283. any holley TBI experts here?
  284. Cam question
  285. Stupid cam shaft idea? Serious question
  286. Jetting starting point?
  287. drive position indicator - cable type
  288. gen 4 gen 5 question
  289. 1986 Wellcraft Nova III opinions please
  290. Oil sending unit and -----?
  291. 781 bbc heads from auto?
  292. Voltage regulator?
  293. 502 Mag Mpi Issue
  294. Measuring Compression Ratio
  295. Any good internet dynos??
  296. Raylar 496 HO upgrades
  297. 502 500hp efi sumble /stall
  298. Good oil pressure sending unit
  299. Stock 330 fuel pump question
  300. Long or short risers needed for this cam?
  301. Mark IV 502 Mag Hole In Piston And No Oil Pressure Help!
  302. 1000 Islands Poker Run Who is going?
  303. I need 1 set of Stainless Marine Exhaust for a SBC. Who's got the best price?
  304. Sea water/fuel pump questions. Leaking oil.
  305. PowerQuset Interior Lights - HELP NEEDED
  306. Could backfiring cause this?
  307. 454 Cam selection down sizing?
  308. if i had water in bravo one fluid...
  309. csm with vinylester
  310. Mercury efi to holley efi. How to get the correct throttle throw.
  311. electric circulating pump??
  312. Iac for 97 454 mag MPI's part number anyone know.
  313. Q-jet jetting help please
  314. Exhaust Riser gasket?
  315. guys I need help please 496 ho surges almost dies...
  316. Helm joint replacement?
  317. Any A/C techs on Long Island?
  318. EMI Thunder Exhaust On Stock 6.2s
  319. Serpentine to v-belt
  320. Strange MPI problem....
  321. 525efi milk shake
  322. 350 mag miss HELP please
  323. engine fault code?
  324. What thermostat housing for closed cooling system??
  325. blowers
  326. Hard steering at speed..
  327. 502 mpi mods......
  328. Fuel Delivery Issues
  329. Need part # for seal on water pump.
  330. Another newbie prop question
  331. 1997 sv24 challenger boat
  332. MSD Distributor
  333. Help! Merc s/c seals & bushings
  334. Posting pictures with an I Pad
  335. Gen5 to gen 6 have had nothing but problems
  336. Need Torque specs for top two bolts on gimble
  337. 280 Tabs to 380 tabs
  338. Marine Machine Hardware
  339. Small water leak on a XR Drive
  340. Black hose water drain system 496 HO
  341. Solid Roller Cam Worth it??
  342. Weak Starting - Ground?
  343. HELP!! 1996 Baja 302 windshield broken!
  344. circulation pump failure???
  345. How much hp will this build produce
  346. Power steering not working replaced parts...?
  347. Motors marked "BRE 168" any ideas?
  348. square k planes
  349. Simple oil cooler upgrade
  350. Prob and drive height suggestions for Donzi 25zx w 625hp
  351. vacuum pump, blown big block
  352. Merc 502 efi code 23 iat censor
  353. 500 efi exhaust issues
  354. Aluminum Intake manifold + salt brackish water
  355. Mercruiser Automatic Transmission
  356. Where's oil thermostat on merc 525 please
  357. What's considered too much oil pressure?
  358. Melting exhaust boots but engine not running over 180!?!?
  359. milkshake clean up
  360. Spark Plug Gap
  361. Benefits of quad rotor
  362. Any Fast 22ft Stingrays maxims out there??
  363. Distributor housing oil boss
  364. Building a new trailer for a 87 Midnight express 37'. Need help!
  365. Cast crankshaft OK?
  366. Reversion possibility question on SBC with XM270HR cam
  367. Riser gaskets...which one?
  368. 502 MPI w/cool fuel return line fuel flow
  369. Best way to clean the outside of an engine covered in oil?
  370. Replacing MEFI1 with ?
  371. Mystery Piece of Stainless in my Exhaust Tip - please help identify
  372. 8.1 oil bypass valve
  373. Stainless vs brass sea pump
  374. Longevity MIG welder
  375. crane 741 cam and stock roller lifters
  376. 502 fuel injected spudders and dies randomly
  377. Mercrusier 350mag w/Bravo 1
  378. Silent Choice Exhaust not opening.
  379. 500 EFI Powersteering pump defect ???
  380. Pressure test headers question
  381. Trim Tab screws ...kinda came out ....?
  382. Cam recommendations for these heads?
  383. 525 vs 496HO
  384. 454 EFI making a sqealing sound
  385. Mini Starter
  386. Fuel level in cool fuel module 496 HO
  387. 38 Fountain Lightning Worth It or Not ?
  388. EGT ranges procharged carb 555
  389. Hydraulic Ram...Who makes this?
  390. Bad powersteering pump?
  391. Liquid filled water pressure gauge problem
  392. 496 HO in-line fuel filter
  393. Using A MSD Box With Stock Merc Distributor
  394. Engine cover help
  395. Engine trouble shooting help needed.
  396. Any feedback on Venture aluminum trailers? specifically the tandem 5k axle 8725
  397. crank choices
  398. What do you clean your boat with?
  399. Installing water pressure gauge
  400. Oil cooler suggestions for 468 bbc
  401. Value of a mark iv standard 454
  402. Billet serpentine pulley 502 MPI
  403. Mercury Zero Effort Throttle Wiring
  404. Power Steering issues
  405. Choosing an oil pump
  406. Screws for exhaust tips?
  407. Looking for an engine builder in South Florida...Who do you know?
  408. OX66 Outboard gages to Gaffrig
  409. 454 Mag MPI not revving.
  410. Heat issues help.
  411. Old merc 90 outboard question
  412. Replacement iron heads for Edelbrock RPM performer
  413. Trim Tab Cable Help
  414. Mercruiser 6.2 Upgrades
  415. 704ci Motor Help
  416. 137-9400 mayfair steering
  417. Carb help
  418. Heavy duty shift cable??
  419. Motor Shut Down Filter/Pump/Other
  420. intermittent nav lights and fuel gauge problem?
  421. Baja 260 with 454.... Has mufflers and would like to remove them.....
  422. Gen IV 502 No Oil Pressure..... Help
  423. Timing question..502..
  424. 525 SC fuel problems
  425. hesitation, intermittent backfire etc
  426. When will thes 525s require work?
  427. Running hot according to the gauge.....454
  428. Prop slip calculator
  429. wiring help
  430. Need VDO Temp Sender
  431. New engine in Formula, more problems then a math book!
  432. 502 mpi v-belts part numbers..
  433. TRS transmission problems
  434. Impeller problems
  435. 496 mag help
  436. Size of harmonic balancer pulley bbc?
  437. How fast is an 88 scarab 1 with an efi 502????
  438. Mercruiser 5.7 efi fuel pressure kit from Autozone
  439. 502 mag MPI starts then stalls after replacing cap, rotor, wires and exhaust!
  440. Just got a noise ticket tonight - need options
  441. Broken dip stick tube on my 260 Merc
  442. 454 oil burn... questions on what to check first
  443. Throttle / Shift Controller - Sea Star or Mercruiser
  444. Thru hull tip internal flapper broke
  445. 496 8.1 Timing cover and gear question
  446. LED Gauge Upgrade
  447. 29' baja is shift cable longer with an imco extension box on the drive
  448. ignition troubleshooting ??? help please
  449. External voltage regulator wiring question
  450. 525sc upgrades for more hp
  451. HP 500 intake grommet??
  452. water in oil on fresh rebuilt 468 with m1 procharger intercooled.
  453. power steering pump question..
  454. 502 Catastrophic Failure!!! Why does this happen?
  455. trs to speedmaster
  456. Screw in fuel sending unit
  457. 496HO manifold over heating
  458. K-Planes Bolt Length
  459. Leakdown Test vs Compression Test? Help with a used boat.
  460. Circulating Pumps on 600sc (Convert to X-Overs)
  461. A/C questions
  462. 525 EFI Oil Pressure to High at Idle
  463. Rough idle?
  464. Fuel pump and delivery
  465. Hairline crackin one blade of stainless four blade prop
  466. power steering only works at speed
  467. 1 merc. 700 keeps vaporlocking
  468. New Mallory Ignition, no spark
  469. best replacement trim tab cables for merc k=planes?
  470. 32 fever with small blocks
  471. Feather throttle to keep running until reaching operating temp
  472. Air Fuel ratio
  473. How much HP? on my 454
  474. Comzilla intercoms
  475. Part # for 500 EFI impeller
  476. If you had a choice which one
  477. 1998 Mercury 250 EFI Factory Shop Manual
  478. B&M Blowers 174 type. timing issue?
  479. help! info on powerquest
  480. manifolds length
  481. Dumping cooling water, lightning headers.
  482. silent choice, issue or something else
  483. I.M.P Viper 310 help
  484. Formula 233
  485. I think I stuck a valve
  486. plug gap
  487. Question about GMPP 502ho crate engine.
  488. Shop Labor times to Pull a motor
  489. Hyd steering hose??
  490. 525 Oil Temp Sensor
  491. Carburetor Help
  492. Mefi 3 ??
  493. 502 dies at wot
  494. Help Please!!!! 88 Four Winns Liberator 211 is SLOW!!
  495. Oil Temp Issues
  496. Another 525 Header Issue
  497. 496HO: would IAC cause this? 1 engine lagging intermittently lagging 100-400 RPM
  498. 525sc idling at 180* rising to 210*
  499. New GM 502 Vibration above 1500 RPM
  500. Whats TO HOT FOR OIL TEMP