View Full Version : General Q & A




  1. determining oil
  2. EFI 525 rear mounted camshaft sensor???
  3. Merc 700sci hrs/lifespan before rebuild
  4. Roots supercharger intake question
  5. Trouble free 525efi - do they exist?
  6. Different size headers
  7. Blower Application - Fuel Pressure Reg. & Return Valve
  8. 502 Ring Recommendation Please
  9. Good Bad opinion Formula 292 or 312
  10. original motors in a 91 sutphen
  11. Leaking Hatch Rams
  12. Mesa Balancing
  13. HTM oil pressure gauge
  14. Regular or Swept back
  15. Budget 454 Build
  16. 420hp 454
  17. benefits of distributor-less ignition
  18. 454 Repower
  19. 500 efi
  20. Dropping some weight on a HP500 carb?
  21. Any one interested in a boat move New Orleans to Detroit Area
  22. Best Cam Choice - Non-roller 350 with Vortec heads
  23. Steering Wheel rotary circuit switch?
  24. Carb talk
  25. Carb CFM?
  26. Gil Manifold Thoughts
  27. head gasket ?
  28. Going blown have a few questions?
  29. 97 PQ 270 laser wt twin 350 mags to 383 400hp what kinda speed
  30. 350 mag rebuild to 383. oil cooler Question
  31. AN fittings and Stainless braided lines
  32. what's the best clamp on muffler/silencer
  33. Formula 242 drive height.
  34. B&M 250 vs 420 Mega Blower
  35. 2001 Sea Ray 280 SS Engine Question
  36. Low water pickup depth below bottom
  37. Have you seen this exhaust manifold before????
  38. 500HP top end in a 502 MAG
  39. Performance Boating Magazine
  40. 525EFI Valve Springs Concerns
  41. Favorite BBC Rod Thread
  42. Upgrades to Cabin Door and Hatches.
  43. Calling all mechanics
  44. Pulled one of my gimbals and the transom is in great shape! Do I still replace it?
  45. Looking to set up a back-up bullet for the chamber
  46. HP 500 Head and Cam upgrade
  47. Alternates for Bravo drives
  48. 7.4 mpi stock cam specs needed
  49. Can you keep the thermostat and circulating pump on roots type blower motors?
  50. engine adjustment front and back.
  51. Fuel system set up
  52. valve spring bearing
  53. Twin engine power steering question
  54. CMI Headers vs Stainless Marine
  55. Removing Silent Choice Exhaust ???
  56. .937 lifters?
  57. Rod bolts, main caps, and what not.
  58. Best oil filter with sandwich adapter and plugged bypass?
  59. Any suggestions on a bench buffer & polisher
  60. Borg Warner 72C transmission upgrades?
  61. Choosing Valve Covers
  62. Another Omc thread
  63. Smartcraft Alarm
  64. New Holley Ultra HP carburetor leaking fuel from throttle shafts....Ideas?
  65. Hyd. roller lifters to solid roller lifters?
  66. swapping k throttle
  67. NXT Transmission
  68. Piston to valve clearance - 454 Mag short block
  69. Fitch Fuel Catalysts
  70. Best place to order Mercury parts from
  71. Need an Anchor
  72. Corvette C-7 LT1 Engine for marine use?
  73. Silent Choice on a 525 EFI 29' Fever
  74. 731 or 741
  75. Oil pump thread
  76. De-tuning my 2001 ilmor supercat 517
  77. Missing skeg(s) and cavitation plate
  78. 502 mag torque #
  79. Is there any product that softens vinyl (interior)? What is the best cleaner?
  80. Drive couplers
  81. boat length?
  82. Blown head gasket and worn wrist pin... rebuild advise?
  83. Wellcraft scarab cv 7.4 v8 engine.
  84. Pressure checking manifold,headers
  85. Flat vs Roller, Blown 454
  86. Can you make a 502 mpi flow more air?
  87. 525 Header/Tailpipe issue
  88. 1" or 2" carb spacer
  89. Dyno proven 675-700 HP 540CI recipes?
  90. Talk to me about closed loop cooling...any reason not to?
  91. Need Help on Heads on Gen 5 454's
  92. Need Help on Heads on Gen 5 454's
  93. Upgrades to stock 350 sbc
  94. Hawk 502 specs
  95. Bearing clearances, oil weight, and more...
  96. Intake Manifold
  97. Fuel Pump and Filter mounting
  98. Hydraulic vs Electric trim tabs
  99. EFI intake
  100. GoPro Cam Choice. . . .
  101. Carb to EFI
  102. Time to rebuild the 502...
  103. Oil restrictor size hp500
  104. 1976 stinger jet boat
  105. Want more hp out if my 502?
  106. How do i get the air out of my K-280's trim tabs?
  107. Has anyone used the new merc digital trim indicators?
  108. Fountain bilge light - bulb ID
  109. How is compression ratio figured?
  110. Who's going to the PRI show next month
  111. IMCO fuel valve instructions please
  112. procharged 502 fuel system
  113. 540CI builds, MAX RPM?
  114. Bravo or Bravo x3
  115. Midrange and low RPM grunt. Discuss please.
  116. 2011 Sea Ray 240 captain seat cylinder adjustment
  117. HELP i have a gremlin onboard
  118. SB Exhaust manifolds
  119. 8' beam into 7'9" garage door
  120. Antifreeze for Winterize Mercury 700's?
  121. Cam Questions - Little Help/Direction needed
  122. single plane intake vs. dual plane
  123. Blue engine maint?
  124. Top end refresh?
  125. Enine Builders?
  126. 388 hustler that was in the classifieds
  127. Looking for some real out of the box thinking....
  128. another milkshake
  129. What size is this
  130. HP 500 valve covers....
  131. Best way to clean old fuel tanks
  132. ss rod ends?
  133. Weiand 177 or 256, which kits?
  134. Step By Step : Building An 871 Blower
  135. Baja 240 sport (24 outlaw) VS 250 (270)es
  136. Where to buy bolster tops?
  137. Fuel pump
  138. How to tell if its an HP gimble ring or not?
  139. Projected or non with blowers?
  140. Smashed Plugs on fresh re-build, any advice?
  141. Does prop slip increase or decrease with speed? Top speed less than expected.
  142. Smartcraft gauge rigging question
  143. What is this plate called and where can I get one?? SsmII
  144. Antifreeze/Magnesium question. (non boating related)
  145. 1999 vortec 454 yes or no
  146. Anyone change an Oil Thermostat in a HP500 Filter housing?
  147. Circulating Pump Size
  148. Using Marine battery in Truck?
  149. motor oils prefered on performance boats
  150. how to remove gas overflow stain side of boat?
  151. Holley fuel pump safety switch 12-810. 2 bad in one year.
  152. Engine Rebuilding
  153. header friendly sub for r44xls
  154. HELP PLEASE....Thoughts on repowering
  155. Roots Blower Sizing
  156. Engine Pre lube systems
  157. boat vapor locked after taking off fuel filter/water seperator
  158. company to handle blower DIS/REassembly and powdercoating?
  159. Gen 6 Heads on a Mk 4 Block
  160. Ebay water jacketed headers?
  161. Innovative Wideband A/F system - cable too short
  162. Revolution Marine Oil Reservoir
  163. Oil pressure safety
  164. Winter upgrades, LEDs, underwater lights, etc
  165. My quest for 60 MPH
  166. Stock power to Ilmor swap
  167. Outboard motor question
  168. Merc Racing 575 SCI running very rough/rich
  169. Kaama Question?
  170. Winterizing Question- Looking for Ideas
  171. Fuel stabablizer
  172. Fuel Filter
  173. 1988 Merc 420's
  174. Gas Ssteam Out Of Whipple Chargers
  175. Gauges Cycle/Sweep
  176. piston coatings
  177. merc twins 496HO will not exceed 2800
  178. Merlin heads
  179. Valve Springs & Rocker Arms - 525EFI's ???
  180. Exhaust Replacement ?
  181. Can we change our S/N
  182. Max safe RPM?
  183. changing throttle shifter configeration on Gaffrig
  184. What's a 502 block worth
  185. Gen 3 Cool Fuel Winterization?
  186. 496 ecm
  187. Found external leak on manifold - crack
  188. milkshake under stbd valve cover, hi water temp on the port side of the block.
  189. Looking for a Twin Disk mechanic
  190. sonic prowler 496HO PCM PROBELM??
  191. Machine shop in SouthEast Michigan
  192. Can I start the engines on the hose with the drives off?
  193. Hawk 525sc's
  194. Secondary idle screw adjustment on quick fuel 1050?
  195. Gen6 cylinder bore question max bore?
  196. 525 rebuilds with 250 hours
  197. Another bad motor
  198. Stainless marine gen 3 gaskets
  199. Power steering fluid tempature.
  200. Why do larger roots blowers use 2 carbs?
  201. Oil temp problem in my 572, need input/advice....
  202. Finally got a new tow rig! (any other 8.1 owners out there?)
  203. Need Boat Mechanic / Engine Builder in Palm Beach Area
  204. Smartcraft and gauges ?
  205. 598 build questions
  206. Profile picture
  207. Timing a custom supercharged engine
  208. gas tank
  209. Smoked 502 tonite
  210. Bbc with v6 module??
  211. Phenomenal experinece with MarineEngine.com
  212. Need engine advice N A 598 cubic inch rebuild
  213. 700 sci - over heat at high rpm only
  214. Twin Turbo Build
  215. Water Press. location
  216. Exhaust manifold differences 502 vs 525 efi
  217. Another Engine Dynoed today.
  218. WTF Did I Just Do. Considering a Formula 400 SS
  219. 33 Baja outlaw vs 32 fountain fever
  220. SBC Built, now looking for jet recommendations
  221. 502efi
  222. 525EFI Warm start problem - ??
  223. 29 fever triple digits
  224. Who makes the Black Thunder?
  225. Little help if possible
  226. Remote oil filter mounting heigth?
  227. Vibration above 4200
  228. Bravo1 drive goes down, but won't go up.
  229. What muffler / silence are these?
  230. big cubic inch chevy?s
  231. Sea Water Pump Pulley?
  232. 502 EFI, spark coming out of the coil, no spark at the spark plugs
  233. Thunderbolt IV sensors
  234. Twin engine boat porposing problem
  235. New Merc 540 replacement engine
  236. Inexpensive 454 mag performance up grades
  237. 500 efi upgrades
  238. Bennett trim tabs
  239. What problems to look for on Merc 700's
  240. Need some help with engine replacement
  241. Cam guru's please read
  242. Question On Coated Pistons
  243. big block chevy correct spark plugs
  244. Bbc valve cover question-hardin extreme
  245. Bravo upper internal plug?
  246. 502 HO Mag questions
  247. Mercury Outboard Mechanic
  248. Recurring gauge problem - 525EFI
  249. Stroker fuel injection
  250. Wet Exhaust to Dry Exhaust
  251. Windshield for a 2003 HTM 24ss???
  252. Mefi 1 to mefi 3 question
  253. The Blower Shop Intercoolers WTF!!!
  254. single SSM 6 drive height? Or who to call?
  255. Weird 525EFI Question
  256. Gimbal housing help needed
  257. 502 Merc parts ID
  258. Trim Tab Advice??
  259. merc mefi 3 question
  260. Transom that was mounted with an X drive mounting a Bravo 1 question
  261. 496 HO 152 IAC Output Code
  262. who do i contact to fix my username to post a classified ad
  263. 1997 502 EFI cranks but won't start, will try and run after shot of starter fluid
  264. Fuel System Fittings
  265. 377 flywheel
  266. 496 HO maintenance while replacing transom assembly
  267. What are they worth?
  268. Vibration on down trim
  269. Where to purchase oil coolers and hardware
  270. 525efi rev limiter
  271. prop changes from 1.5 to 1.36
  272. 1999 Merc 454 mag ign issues
  273. motors bogging ? fuel pressure maybe?
  274. Engine Quest/RHS 320 Iron heads
  275. Starving for fuel...
  276. Can These Be Repaired ????
  277. QUICKSILVER SBC long block assembly worth building?
  278. I need to find a good shop in the Gulf Shores, Al or Pensacola, Fl area
  279. Aluminum Head Exchange to Steel Head
  280. Prop shaft carrier bearing stuck
  281. Aluminum Head Repair
  282. how hard is it to mefi tune my own after i install procharger
  283. 5 blade on 2004 288 sunsation
  284. Value Of a 91 Mark IV 502 Mag
  285. dry exhaust
  286. Volvo Penta 7.4 Gi vs GSi rev limiter
  287. tall deck to short deck exhaust problems
  288. Opening a can of worms
  289. merc xr gear pinion
  290. Trying to identify a pair of Mercury OB's
  291. Front Seal Unazzed
  292. 1998 Mercury 250 EFI
  293. 496 with whipple worth
  294. 350 mpi possable reversion
  295. Carbed 502/502HP fueling issues on 1996 Baja 272 Islander
  296. 502 magnum mpi IAC crossover
  297. Wrong oil?
  298. 454 Baja overheating
  299. Anyone know how too get ahold of mr gadgets?????
  300. Felpro 17042 vs 17046
  301. Roots Supercharger experts Snout problems
  302. 500efi - starter burned up + more - Help!
  303. Fuel supply issues
  304. Checkmate 251 Convincor vs Profile 26
  305. 1989 Power Play Conquest Decals
  306. Latham Steering Leak
  307. 502 EFI shutting down after 5 seconds of run time
  308. Part numbers question
  309. Volvo Duo prop
  310. Hp 500 carb setup help
  311. One exhaust is only shooting out water
  312. HP500 boost question
  313. Help 502 EFI stalls out
  314. 1996 HP 500 Carb lifter part numbers
  315. Removing CATs on new 8.2L motor
  316. Low oil pressure and Oil cooler questions
  317. Ram air
  318. Mayfair Hydraulic Steering Ram Rebuild help.
  319. 2001 555 PCM to mefi 3
  320. motor not hitting WOT?
  321. Need help with engine issue
  322. Knock came and knock left
  323. Paging skater Scott 36
  324. Mercruiser 496 ho overspeed code
  325. Raymarine DVD
  326. A little roots blower info.
  327. Can you please direct me to some Velvet Drive Identification information.
  328. Are my 454's magnum's??
  329. which fuel transfer pump to use ?
  330. 500 efi fuel fouling plugs
  331. 525EFI Header Failures - CMI vs Hardin - All failing
  332. Mercruiser Computer Programming
  333. 525 EFI sea pump stops pumping
  334. Fuel Pressure
  335. Should I scrap my anti-spam valves?
  336. 088 heads on gen 5 454 ?
  337. Trim and Tilt Pumps, why is one so much faster??
  338. what is killing my fuel pumps?
  339. SBC to BBC Conversion Questions
  340. Bilge pump in Fountain left running dry- are they toast?
  341. solenoid or trim pump bad?
  342. Gaffrig controls neutral safety switch
  343. 600SCI Gurus Needed -- No BOOST
  344. 088 Heads Max lift?
  345. adding 174 blower
  346. 502 Mag Removal
  347. 525 Header issue; I'm stumped..
  348. Top speed and cruise speed and gearing advice new to forum
  349. Pump for toilette and post-swim hotwash
  350. What Size Carb.
  351. Anybody use these boat dollies?
  352. Looking for advice
  353. SSM V alignment tool
  354. Starboard motor won't start - electrical, fuel?
  355. Mirage won't plane off
  356. Can anyone help identify this boat, and help provide feedback on possible purchase.
  357. 500 EFI Fuel Line longevity
  358. Cigarette 20 Update
  359. Fuel feed issues
  360. Time to replace fuel lines?
  361. Misfiring carb 502
  362. How much does Deck weigh on a Formula 302 SR1. I want to lift it to access stringers
  363. 525 EFI Alarm
  364. Noise when shifting
  365. 525 EFI H2O pressure?
  366. oil temp
  367. Merc 5.7 2bbl 1998 unique concerns.
  368. Replacing dipstick tube in 454
  369. Oil pressure problems!
  370. 454 to 502 repower suggestions
  371. PBM/Erson rods and cranks, comparable??
  372. 500efi overheating hot port header, help
  373. jet size
  374. Motor question for the Guru's...
  375. HP 500 carb fuel mech pumps
  376. Intake to head sealing issue question
  377. Collapsed lifter, bent pushrod
  378. anyone make hinge pin covers?
  379. Value 26 Prowler
  380. Ride quality older 38's which ones to look at
  381. need HEI DUI distributor info
  382. Hardin Marine - Hurricane Lite 525 Headers -- who's got 'em??
  383. solid or rubber prop hub???
  384. 525sc conversion
  385. 7.4 freshwater cooling
  386. Lower than I like Oil Pressure
  387. marine a/c units
  388. aftermarket mechanical fuel pump
  389. need help with code 42 on V6
  390. O2 guage
  391. Bravo 1 Vibration in forward drive not reverse??
  392. Dual trim pumps, one switch?
  393. Remote trim switches
  394. Reading Starts Me Thinking - More Power
  395. Water in fuel lean condition.
  396. Low oil pressure in brand new 502 efi
  397. Serpentine crossover kit
  398. power gone from my 8.2 mercuiser
  399. Moisture in valve covers with oil thermostat?
  400. Power steering leak
  401. 500HP carb- synthetic oil?
  402. oil spray from the front of a new 502 motor custom built
  403. Intake ?
  404. Swain Tech PC-9 Piston Skirt Coating
  405. 81 Formula, both alternators do not work?
  406. Water pump shaft seal
  407. Oil filled bilge - need advise please !
  408. how do you align an engine?
  409. efi vr carb
  410. Easiest way - converting 502 to EFI
  411. 502 mpi no inj. pulse on 1/2 the inj ?
  412. Fuel Injector Replace/Repair 805225A1
  413. Switch standard Bravo 1 to XR?
  414. has anyone ever powder coated blower pulleys
  415. PCM 555 codes
  416. 496 Mag HO front motor mount options?
  417. Camshaft sensor for 2001 496
  418. Murcury Racing HP500
  419. Old School HP500 water pump blown gasket (NOT SEA PUMP)
  420. Fuel tank level sender for formula needed
  421. Quietest thru transom exhaust setup
  422. Oil pressure gauge?
  423. Sloppy steering on bravo want to add hydraulic steering
  424. Which brand do you like?
  425. Merc 5.7 - 260hp
  426. Rapid beeping?
  427. Nordskog sending units?
  428. Autometer Gauge Connections
  429. prop slip?
  430. 781 heads best mods
  431. 38 Fountain fever wind deflecter /where to get one?
  432. How to tell the diffrence between a bravo 1 and 2
  433. any holley TBI experts here?
  434. Cam question
  435. Stupid cam shaft idea? Serious question
  436. Jetting starting point?
  437. drive position indicator - cable type
  438. gen 4 gen 5 question
  439. 1986 Wellcraft Nova III opinions please
  440. Oil sending unit and -----?
  441. 781 bbc heads from auto?
  442. Voltage regulator?
  443. 502 Mag Mpi Issue
  444. Measuring Compression Ratio
  445. Any good internet dynos??
  446. Raylar 496 HO upgrades
  447. 502 500hp efi sumble /stall
  448. Good oil pressure sending unit
  449. Stock 330 fuel pump question
  450. Long or short risers needed for this cam?
  451. Mark IV 502 Mag Hole In Piston And No Oil Pressure Help!
  452. 1000 Islands Poker Run Who is going?
  453. I need 1 set of Stainless Marine Exhaust for a SBC. Who's got the best price?
  454. Sea water/fuel pump questions. Leaking oil.
  455. PowerQuset Interior Lights - HELP NEEDED
  456. Could backfiring cause this?
  457. 454 Cam selection down sizing?
  458. if i had water in bravo one fluid...
  459. csm with vinylester
  460. Mercury efi to holley efi. How to get the correct throttle throw.
  461. electric circulating pump??
  462. Iac for 97 454 mag MPI's part number anyone know.
  463. Q-jet jetting help please
  464. Exhaust Riser gasket?
  465. guys I need help please 496 ho surges almost dies...
  466. Helm joint replacement?
  467. Any A/C techs on Long Island?
  468. EMI Thunder Exhaust On Stock 6.2s
  469. Serpentine to v-belt
  470. Strange MPI problem....
  471. 525efi milk shake
  472. 350 mag miss HELP please
  473. engine fault code?
  474. What thermostat housing for closed cooling system??
  475. blowers
  476. Hard steering at speed..
  477. 502 mpi mods......
  478. Fuel Delivery Issues
  479. Need part # for seal on water pump.
  480. Another newbie prop question
  481. 1997 sv24 challenger boat
  482. MSD Distributor
  483. Help! Merc s/c seals & bushings
  484. Posting pictures with an I Pad
  485. Gen5 to gen 6 have had nothing but problems
  486. Need Torque specs for top two bolts on gimble
  487. 280 Tabs to 380 tabs
  488. Marine Machine Hardware
  489. Small water leak on a XR Drive
  490. Black hose water drain system 496 HO
  491. Solid Roller Cam Worth it??
  492. Weak Starting - Ground?
  493. HELP!! 1996 Baja 302 windshield broken!
  494. circulation pump failure???
  495. How much hp will this build produce
  496. Power steering not working replaced parts...?
  497. Motors marked "BRE 168" any ideas?
  498. square k planes
  499. Simple oil cooler upgrade
  500. Prob and drive height suggestions for Donzi 25zx w 625hp