View Full Version : General Q & A




  1. Exhaust Valve Guide Clearance
  2. 415 hp 502 efi engine temp
  3. water jacket sealant
  4. Big block Chevy 454 Gen V cutawy drawing
  5. U-joint froze on my TRS. What part number to replace it?
  6. How to remove exhaust hose?
  7. Is it worth putting coolant hoses back to front on a 4 corner intake manifold
  8. Bravo 1 upper/lower compatibility
  9. Help with ?'s
  10. Gimbal boot ring
  11. power steering actuator and high pressure line
  12. Smartcraft System View Race Edition Help
  13. 500efi, exhaust question
  14. whipple 525 ecm flash
  15. Help with HTM
  16. drive fluid in bilge
  17. Ready to run distributors
  18. Play in Steering Wheel
  19. Switching from carb to 525's.questions?
  20. Carb box procharger
  21. Is it worth adding a PCV like on the HP500's?
  22. Will 454 risers bolt up to the 496 aluminum manifolds?
  23. wire color identification
  24. Bravo 1 gear lube capacity.
  25. Gaffrig Digital GPS speedo
  26. Carb needle material?
  27. mr gasket
  28. Is this a Bravo Drive?
  29. More Useful Information
  30. Any one know this boat?
  31. oil temp sender
  32. Dry exhaust flaps??
  33. Mr. Gasket
  34. 1988 Mark IV 454 Mag--500 rpm loss but its random
  35. Edelbrock Performer RPM Intake Manifold vs GM 6269318 marine intake
  36. Gen six 502 casting numbers
  37. do i need a 496 y pipe
  38. Where to buy neutral safety switch
  39. Lets talk mechanical fuel pumps
  40. Water pressure..draw off location?
  41. Exhaust question
  42. intake gasket
  43. where i can get this battery hold down bolt?
  44. MerCruiser 502 Mag MPI wont shut off....
  45. Help, Starter Issue
  46. idle is up at 2000 help
  47. Hydraulic Steering installation advice needed
  48. Fuel Return
  49. Stock 502 carb questions
  50. intake gasket
  51. 525 question
  52. Can anyone identify this fuel pump?
  53. External Steering
  54. Audio: Feedback through Amplifier with Trim
  55. Buzzing Electric Fule Pump
  56. 320EFI timing mode. HELP!
  57. VST tank vent. Will this work? pics
  58. port tab wont go down..
  59. To bypass or not to bypass...
  60. help with cam shaft 454
  61. Gen V Big block oil cooler help
  62. Broken 454, options?
  63. new help intake and carb setup
  64. Trim switch not working
  65. sea pump hose size
  66. gear lube
  67. Distributor not dropping down
  68. 525 efi power sterring pump
  69. Where can I get hatch mirrors
  70. Moving Fuel Filter
  71. Oil Pump shaft length?
  72. drive alignment questions
  73. Mercury Side Mount Control - Trailer Button
  74. driving a boat question
  75. drive indicator
  76. engine i.d. 454
  77. Hyd steering install help
  78. put in new motor, mounts not lining up
  79. 496HO 2003/ forged internals???
  80. Oil Press and VM Gauge
  81. Speedometer Hose Blew Off – Thought Boat Was Sinking!!!
  82. Alarm Advise - for driveway, traveling by road & anchoring - need advise
  83. Looking for TRS Bellow part numbers 60932A4 or 54406A 1
  84. Dipstick tube extend to bottom of pan? Merc 420's
  85. 502 mpi running on 4 cylinders
  86. 500efi mysterious plug..?
  87. Can this distributor & coil be used on a carbed engine?
  88. Hyd. steering question? Need some help guys.
  89. HP 500 Bulldog
  90. So how many batteries can you safely charge??
  91. what oil in a whipple
  92. Erratic Vaccuum readings
  93. HP500 Cylinder Head Bolt Torque Spec
  94. More 575sci build questions
  95. Dual cable steering on 98 25' Outlaw
  96. Engine alignment needed?
  97. distributor
  98. Strange "dotted" pattern on valve seats and faces
  99. transom / exhaust rubber seals?
  100. help needed identifying Scarab trim tabs
  101. upolstrey shop in NE Maryland or Central P
  102. 350 mpi horizon low water pressure. on port side
  103. Captain Call Wires
  104. Do you really need hard anodizing in fresh water?
  105. need External hydro direction?
  106. What are the Standard Specs for Hp500 Cylinder Heads
  107. need adjustable FPR on 496ho raylar103kit ?
  108. Mercury Racing QCV4 - difference in length between 700 and 1350?
  109. Rebuild number for dominator carb on 540 bulldog
  110. What to do with old gas?
  111. Transom Exhaust Rings??
  112. Hex or blade oil pump driveshaft???
  113. Looking for blower belt
  114. Hardin Marine 2 stage stainless seawater pump
  115. Another 502 mag efi not starting. Tons of tests have been preformed.injectors fried?
  116. Back from the dead - and so is my boat...
  117. flywheel question."help"
  118. chiller plumbing advice needed
  119. Oil Capacity in 7.4 Mercruiser
  120. How do I get the top off this Holley carb?
  121. torque spect
  122. Valve cover gasket number for 525efi?
  123. Winter upgrades...what has everyone else been doing? Post pics, videos, etc....
  124. Merc Trim sender/limiter wiring help
  125. Sea water flow?
  126. Eddie Marine step pads
  127. valve spring compressor
  128. "Xtreme" remote thermostat
  129. cost to rebuild 500 EFI
  130. 454 mercruiser borg warner TR2 starter issues
  131. MERC 95 350 TBI injectors not working
  132. milky oil
  133. Best sealant for through haul fittings
  134. Front Cylinders not Firing
  135. Mercruiser engine questions
  136. Crane 168731 reversion?
  137. SmartCraft SC1000 gauges
  138. hatch actuators
  139. exhaust tips
  140. Dremel, which one?
  141. OK to run head studs along with head bolts?
  142. 496 intake deposits
  143. questions about 500 EFI's
  144. Through Hull Water Pickups ?
  145. max timing on 454mag MPI's
  146. Oil pressure gauge issue
  147. Bravo 3 trim strangeness...
  148. Small block or big block 30ft range ?
  149. mayfair steering problem....new install. Help needed
  150. Need HELP with correct prop nut\kit
  151. Need help raising fuel pressure
  152. head stud nuts
  153. Power assist steering pump needed
  154. K-Plane wiring diagram
  155. Squeaky Sea pump
  156. 502 Exhaust manifold gaskets - Replace?
  157. Blue smoke at idle
  158. Black silicone exhaust hose
  159. water water water
  160. 454 MPI Fuel Pump Issues, Pump not getting power
  161. open bow cat
  162. ???Can 250 chillers be modified to work with 177???
  163. 525efi coolant reservoir cover
  164. Gimble rings
  165. Helm Pump advice for #6 drives Please
  166. Cam / Exhaust question
  167. hello newbie here with a 22' stingray
  168. what are these tank fitting?? want to add return line!
  169. Purple gauge lights or boots
  170. Ignition/Distributor upgrade? Little help...
  171. Carpet for a 24 outlaw?
  172. 72c velvet drive borg warner where to buy rebuild kit
  173. PLUG GAP....what should it be?
  174. carb to efi
  175. holley commnder 950 efi
  176. Newb here from TX!!
  177. Stuck Tailstock on Wetsump #6
  178. Drive alignment on extension box?
  179. ZZ502 pushrod question
  180. 575 rebuild
  181. turning up 600sc's
  182. Remove Bearing in XR Gears?
  183. whipple adapter plate question
  184. 502 ignition rotor
  185. new engine
  186. Can I convert my Gaffrig with 2 throttles to 3?
  187. Mobil V-Twin ZDDP level?
  188. Need x dimension on Donzi 25 zx
  189. 496 mag won't crank
  190. Bravo1 Annual Service Guide - Help
  191. Flushing oil lines... what to use?
  192. Cruisair wiring documentation??
  193. Thunderbolt 5 ignition module
  194. weiand 177 oil fill
  195. warm starting issue
  196. Second boat with corroded water inlet
  197. Pressure testing manifolds
  198. Propshaft Runout
  199. Depth Sounder ?
  200. Underwater Lights on a Hydro Hoist?
  201. Major need of help!!!
  202. Broken valve keepers - common problem
  203. 496HO TPS low range?
  204. o2 bung location
  205. Mercruiser decals
  206. Dana exhaust for 496ho
  207. exhaust valves
  208. Considering dyno-testing / procedures for marine engine?
  209. How much water is needed to cool rubber exhaust joints and internal flappers
  210. Installing manifolds and dry risers. Where to relocate shifter/remote oil filter
  211. 502 hard to start when cold
  212. What is the procedure for checking timing chain slack?
  213. Best Headers for hp gain 2006 25OL
  214. quench effect on blower motor
  215. MSD REV-Limit Modules ??
  216. CMI Etop question
  217. Too cold with crossover installed ???
  218. 496 seawater pump failure
  219. CMI Head Stud Clearance
  220. How does this go together???
  221. WOT different RPM's
  222. Eddie Marine billet sport tabs question???
  223. Merc 525EFI oil water fuel pressure sensor
  224. trim pump major leak into bilge
  225. Steering Rams Rebuild
  226. Resonators in 502 mpi exhaust
  227. Gel coat Cracking and Stringer Loose, What to do?
  228. Automatic buffer
  229. hawk 525sc sparkplugs
  230. vice marks on connecting rod cap - how big a deal is this?
  231. 741 cam question
  232. 454 Mag not starting on all cylinders.. HELP!
  233. Hydraulic steering ram install help
  234. 2 stage water pump and outdrive for innercooler
  235. when using rod bolt stretch gauge do you do one bolt at a time?
  236. 496 scan tool readings
  237. 4 wire Corsa solenoid installation
  238. pyrometer best location
  239. Whipple oil change?
  240. This is how guages are made...?
  241. what timming are you running in your blown sbc
  242. AFR meters
  243. Ring gap on a 496 -8.1L vortec engine ?
  244. Life span of an Iconel valve??
  245. 383 rotating assembly
  246. Corsa Quick and Quiet 25 Outlaw
  247. Mercruiser 420 Oils - Zinc Additive?
  248. Can Oil Cooler Leak Water into Oil?
  249. 502 refresh questions?
  250. Small Block Oil Pump
  251. 260 mercruiser
  252. imco powerflow plus exhaust
  253. 90 26ft profile offshore project need insight on it
  254. EZ OFF on imron
  255. Altenator Charging 2 in parallel? Bad?
  256. Bravo coupler help
  257. 575SCI throttle body upgrades??
  258. Computer Tech
  259. Baja hammer tach problem
  260. rub rail
  261. Engine Tuner/Builder Toronto Area
  262. Best Aluminum cylinder head SBC 383.
  263. 496 Mag HO Oil weight/power gain
  264. Any Metal Fab Guys-What small plasma cutter?
  265. Ideas for increasing power in a pair of Merc 454 L29s
  266. Painting speaker grills
  267. Hydro Hoist w 38 Fountain
  268. Non Vortec to Vortec swap.
  269. 454 cracked heads please help!
  270. O2 Sensor location
  271. How Hot is TOO Hot !
  272. Drives trim in/out in different speeds?
  273. Looking for help with exhaust system
  274. Aluminum Header fit issue
  275. fuel sending unit with duel return lines?
  276. Am I screwed?
  277. Wall cooler?
  278. need help with any info on kaama surfice drives
  279. re coloring hardware
  280. "Budget" 555 build
  281. max over bore question on 350 sbc
  282. new exhaust suggestions
  283. Battery ?????
  284. Through hull fittings
  285. Underwater LED Placement On Cats
  286. Mercury 525 EFI Adapter Harness
  287. Dart Block Bronze Lifter Bushing Bore Oil Holes Not Lined Up, Problem??
  288. Gas tank plate
  289. 1994 baja 22 Caliber
  290. Mercury / APBA valve covers on OEM steel heads & roller rockers?
  291. Corsa 4 Wire Harness - White
  292. 525sc w/ chiller belt??
  293. A little help please on 500efi heads
  294. Does oil go bad just sitting in motor?
  295. AC Delco Rapid Fire Spark Plugs
  296. K plane rocker switches
  297. vortec cam upgrade
  298. Dash Panels
  299. engine hours
  300. Trim Tab thru hull fitting where to by
  301. Better of the Two Drive Showers
  302. Valve check????
  303. hi-performance 320 EFI
  304. bronze sea pump kit part number?
  305. baja stereo help
  306. Help with corsa exhaust please!!!!
  307. Distributor gear needed with 741 cam
  308. Understanding Piston Ring Tension
  309. Gimble bearing
  310. Roller SB timing cover
  311. Merc 1075 Roller Hyd
  312. What distributor gear with 741 cam?
  313. retrofit K-planes over Bennett, etc?
  314. exhaust
  315. Inline fuel filter
  316. Fuel pressue guage idea on 454/502mag Mpi's
  317. What exactly does "Motors have been Freshened" Mean?
  318. oil filter
  319. Cam recomendations
  320. marine blower carbs
  321. rookie in need of help
  322. New member discussing helmets/head wear
  323. Swap Shop Resolution – What’s the right thing to do – Let the forum decide!
  324. Blower pulley with serpentine acc belt
  325. Trim pump fluid reservoir
  326. Rod bolt stretch specs needed
  327. Intake to Water pump bypass hose
  328. Racepak IQ3 Data System
  329. Bravo Hub
  330. Is the splash shield needed on 502 gen6????
  331. tired of the bullsh*t vapor lock!
  332. 2.3 Quad Rotor Whipple Installation Instructions
  333. Is this piston usable?
  334. 2000 7.4 mag mpi stalling only when cold start ups
  335. one wire alternator
  336. full hydraulic steering issue/new install
  337. oil cooler plumbing
  338. Question on manifolds
  339. Baseline jetting for 502 with 4/7 & 2/3 swap
  340. 502 not firing
  341. Water pick ups
  342. Trim Tab/transome sealant
  343. Need urgent help from an expert
  344. trim tab help!
  345. Behold the glory...
  346. Whipple standard vs MOAC intercooler
  347. dallas texas leak down test needed
  348. Looking for an intake air temp gauge
  349. Chris Craft 390 X Twin TRS Out drive Question
  350. Detonation Indicator?
  351. EGT vs A/F?
  352. Head gaskets
  353. Bunk Carpet
  354. What thread is a knock sensor?
  355. Oil Change in the 496HO
  356. Keith Eckhert 2 stage water/sea pump!
  357. add O2 bung in Keith Eckert aluminum headers
  358. Oil Filter
  359. Anyone have some Weiand 10 rib pulleys for dyno use only??
  360. Engine experts input needed on used engine
  361. Replacements heads for Mark IV Rectangle Ports
  362. Wiring for shorepower??
  363. Eaton pump -need spline to tapper shaft
  364. oil filter
  365. mockup engine
  366. cold water a bad idea?
  367. Gimble bearing
  368. front timing cover oil seal replacement ?
  369. Cuddy bow mount ladder
  370. Muffs ob dual water pickup bravo 1
  371. what intake and head gaskets for 500efi
  372. Any idea where TEAM THUNDER comes from?
  373. 1995 23ft wellcraft nova spyder windshield
  374. trim pump? 2 wire or 3 wire
  375. teach me about Eaton helms
  376. Holley Intake or Stock Intake
  377. Tiger head sets
  378. Engine/EFI harness -
  379. water circulation pump or regular water pump
  380. Main bearing bore variance after line hone
  381. 555 blower pistons
  382. Best Shift, Throttle, Trim Indicator Cables 2013
  383. 496 HO 425 h.p. hours
  384. B&m 250 or alum heads?
  385. Block for 383
  386. Stainless marine or emi???
  387. efi question
  388. 90 mercruiser 7.4 mags
  389. Is an Edelbrock 1410 right for me?
  390. Cooling water pressure in exhaust manifold question
  391. 500 EFI Longevity
  392. Seaquest or Nautolex Capitano vinyl
  393. teague 525 efi upgrade
  394. labbed prop on Magic Scepter 28'
  395. Inconel exhaust valves
  396. Cam choice on a 383 stroker
  397. Sea Strainers?
  398. Fly wheel housing needed
  399. 500 EFI timing
  400. Fuel system setup!!!Does this sound right??
  401. mechanical fuel pumps
  402. reverse rotation engine
  403. 700's and 700's
  404. fuel pressure sender location
  405. anyone have an '82 40' Excalibur Hawk?
  406. 700 SCI - Drive options?
  407. Are Depars mufflers any good?
  408. Dry tails done align with the transom
  409. Carb Size
  410. Steering ram mounting location
  411. WEBER carb. bowl draining
  412. key switch not cranking motor
  413. What is a safe dynamic c/r to run on 87oct
  414. passive fresh water flush for closed cooled engines?
  415. 43' Scarab Thunder
  416. Breather question for you blower guys.
  417. 496Mag, Dissapearing drive fluid
  418. How much is an mpi setup worth?
  419. Continuous duty solenoid
  420. So many pistons to choose from, Recommendations for procharged 454??
  421. Changes in fuel octane
  422. What kind of life expectancy for wet blowers???
  423. vinyl die
  424. Free Air Subs.....opionions???
  425. Low profile windshield
  426. trim and trailer switch and the trim switch on dashnot working
  427. Stereo question
  428. Has anybody ever had Red Loctite fail?
  429. What is the rpm of my supercharger with?
  430. 502 MPI Intake, POS or Can It Be Modified
  431. For those who have gone to Desert Storm
  432. Mercruiser fuel pump problems
  433. 1981 chris craft scorpion 260 as a raceboat?
  434. gen v fuel pump question
  435. Genuine Merc vs. Sierra
  436. Looking for EH brake kit
  437. 454 v 502 mag cranks, differences?
  438. Key West Poker Run 2013
  439. dyno tune close to indianapolis
  440. surface drive arnson
  441. neutral safety switch
  442. Mayfair add on steering kit
  443. 2000 502 Gen VI Issues - Fuel Injection or No Fuel Injection - Rebuild Questions
  444. trying to figure out what cam
  445. trying to figure out whay cam
  446. Anyone know what speaker size came in Baja Hammer?
  447. windless system, anchors away
  448. 225 Outboard
  449. 500efi intake on a 502mpi what is needed to make it work?
  450. vapor separator issues
  451. Lets talk about roots blowers.
  452. Scarab 22 Trim Tab Question
  453. Arias Pistons VS JE Pistons
  454. What removes carbon deposits?
  455. Water Reversion?
  456. Simple prop question???
  457. Where does everyone order their Marine perfomance parts?
  458. Is a cavation plate really needed w/ 5 or 6 blade Props?
  459. Any difference in a marine 502 gen 6 and a standard gen6 502?
  460. Gear Ratio vs acceleration/speed
  461. Which intake gasket to use?
  462. Any way to prevent corrosion on aluminum intake?
  463. Where to get corsa exhaust parts?
  464. Garmin hooked into Smartcraft?
  465. Trying Q&A looking for the A on a GIL Q
  466. belt size/length for hp500 or other bbc with larger pully setup
  467. merc 525sc engine oil bypass valve
  468. What is correct cam end play for Gen VI, and how do you set it?
  469. Donzi 26/28ZX closed cooling questions????
  470. 79 31 excalibur weight???
  471. scarab iii manuals
  472. Confused - my new oil rings are much thinner than originals
  473. Bravo XR Broken top cap stud
  474. Foil Stickers
  475. oil pump pickup choice
  476. Power steering fittings
  477. Dart Heads 320 Race or 325 Pro 1
  478. Hyd steering advice
  479. Dana marine trim tab question.
  480. Merc Racing 1075 dyno video
  481. cat re power
  482. Prestige Motors/ to be recommended?
  483. Need Great HEAD advice (509) MAG
  484. 383 Street Engine / balancing issue
  485. Help with a procharger spacer PLEASE!
  486. Opinions needed......should i straighten the bottom or not?
  487. W/B 02 sensors
  488. Custom engine name plate
  489. CMI Air Cylinders
  490. K plane transom bolts
  491. What blocks do I have in '93 Fountain?
  492. 35' Fountain carpet
  493. Best sounding Marine subwoofer. 10 or 12?
  494. This might be a dumb question
  495. 2 stage KE waterpumps and Sportmaster LWP help...
  496. JR Marine Template
  497. Need GPS Speedo feedback, What brand.
  498. new 800 cfm from holly jetting
  499. Metal spray crank repair?
  500. 1997 scarab 29 ft