View Full Version : General Q & A




  1. Header tube discolouring, what should I do?
  2. Wierd sea water hose problem
  3. How much timing advance should I run?
  4. Stainless Marine manifolds SBC power steering line in the way
  5. Loosing fuel pressure
  6. I'm cursed!
  7. Cams size
  8. shipping a outdrive
  9. 500 HP Intermiten Idle Issue
  10. show me your Fountain speaker locations
  11. 575 sci
  12. Older 575hp 540ci merc bulldog engine knocking
  13. 1995 502mpi won't start when hot
  14. New style and old style 525
  15. Bravo 3
  16. Detonated piston & blew head gasket. Now what?
  17. frictional losses of 4.25 stroke motor vs 4.0 stroke
  18. efi for supercharger.
  19. Reoccurung water pump failures...
  20. Mag efi
  21. Mercury 525 Rocker arm replacement
  22. Oil pressure flutter at higher rpms.
  23. Do anti-reversion dams work?
  24. Replacement steering Verado 400R
  25. Hydraulic Hatch Actuator
  26. Oil Pressure Bypass Valve Question
  27. slip %
  28. Pre-Filter Oil Filter Screen - YEA or NEY ?
  29. Power steering pump fitting Aeroquip?
  30. Catalyst elimination for "test purposes"
  31. whats the torq spec for bravo transom plate?
  32. Msd total timing procedure when locked out
  33. A little more Tinkering
  34. 502 MPI intermitant no start when hot.... not fuel prob
  35. Fuel Coming out exhaust
  36. Hammer knocking noise when in gear over 3000 rpm
  37. Will MSD digital 6 work with thunderbolt distributor?
  38. Holley Commander 950 mpfi won't fire!
  39. Thunderbolt V ignition, will big block module work on a small block?
  40. need part # for hose transom to sea water pump
  41. GM Fastburn heads, any experience with these?
  42. Weber carburetor
  43. new 540 water in oil
  44. Vessl View & DTS
  45. Push rod retainers.
  46. 5.7 timing with comp 270 cam
  47. CMI headers. Are they fixable?
  48. EFI Systems
  49. Impeller
  50. Chaparral Villian SLV Speed Capability
  51. Motor Issues
  52. procharged 454 Mag rebuild upgrades ????
  53. Heat exchanger help
  54. Rosella Oil
  55. converting my 350 cid merc. 320 efi's to carbs. what jet sizes?
  56. Plug for ?
  57. 500 efi 50lb fuel injector
  58. 502 mag loads up under load.
  59. Outdrive line help
  60. drive swap alpha 1 gen 2 to bravo one
  61. Blind mounting swim ladder? - 89 Baja 226 Islander
  62. Advantage 27' rear seat removal
  63. Where to get gaskets 5.7 mag gen +?
  64. Imco riser gaskets
  65. 502 build
  66. External steering on a B1 vs XR
  67. 496 intake manifold gasket
  68. RPM Lug
  69. Dominator on 4150 sniper jr with spacer?
  70. 2005 Mercury Racing motors one is low on power
  71. 496 Rockers
  72. More HP in 7.4 MPI's?
  73. Bad Vibration, need help troubleshooting
  74. Hours vs mileage.
  75. Gear oil bottles
  76. Tuning 350 Vortec w/ LT4 Hot Cam & Holley 750 Double Pumper
  77. Anyone have oem MEFI1-4 tunes for 502MPI?
  78. Rpm issue ideas.... I'm lost....
  79. Any recomendations for a Surveyor near Gainsville Ga?
  80. Pontoon steering help
  81. 7.4 MPI low power
  82. Need help with block serial numbers
  83. Sea Strainer question Bravo Hose size?
  84. Stuck cabin door.....
  85. Loss of oil pressure after rough ride
  86. 32 fever sealing
  87. Supercharger Questions
  88. Mercruiser Alternator Upgrade?
  89. WTH is going on with my oil temp
  90. What is fuel pressure spec on 2001 7.4 454 mpi Mag?
  91. 540 NA MEFI 3 Intake Vacuum Question
  92. Help with prop
  93. Opinions on 1989 575hp bulldog 540ci and ssm 3 drives?
  94. 2003 496 HO dreaded two beep alarm
  95. 502 MPI Low Fuel Pressure
  96. 300xs ECU
  97. Strange noise... please help!
  98. How can I tell if my motor is inter or ext balanced
  99. Need a trim actuator clap
  100. 1987 454 merc main harness
  101. Newb, sure its not the first time.
  102. what transom work is needed to convert TRS to SSMIII drives?
  103. 600 sci
  104. lunati cam 20010666
  105. lunati cam 20010666
  106. Flush OMC 460 King Cobra - raw water pump in lower unit.
  107. draining the block - easier way? 1/4" valves?
  108. Water Restrictors
  109. need help replacing a harmonic balancer
  110. gen VI 525SC pistons
  111. Identifying 502's
  112. Suction hose
  113. speed gain
  114. Bell housing mounted starter
  115. Russell Check Valve VS. Anti-Siphon Valve
  116. 500efi with blower shop 250s
  117. Dyno sheet
  118. Anybody use Anthony's Marine Engines in St Pete?
  119. Sonic with a 496 engine noise
  120. Help! 502 efi keeps stalling
  121. 502 efi temperature sending unit?
  122. Please, need help w/ mefi1 502 mpi code 21 and 42
  123. Rebuilding 502's
  124. 540ci 700hp build recipe
  125. 496 Ho question - fuel leak?
  126. 8.2 EFI fuel pump question
  127. Distributor info
  128. 496 Mag HO - slight miss, poor mileage, loss in rpm
  129. Quadrajet flame arrestor
  130. bomar hatch latched pulled off glass
  131. Which is easier?
  132. Plumbing water hull pickup or drive pickup?
  133. Replacing exhaust tips
  134. Main Bearings ?? Mercury Racing
  135. B&M 250/420 Idler Question
  136. Target Air Fuel ration N/A engines.?
  137. 871 Blower experts CHECK IN
  138. Mercury 500 Sea water pump
  139. Water pump direction 500HP vs 502 MPI
  140. 600SCI engine water Flow Issue
  141. So many threads on milky oil, but heres a bit of a spin
  142. Replacement MEFI 1 -- Any one know what my options are?
  143. Thunder powerboats
  144. HP500 Ignition Issues with Marine MSD Setup
  145. Cant trim under power??
  146. flywheel material and type
  147. Wiring the drive trim switch on the gaffrig throttle...is a fuse needed?
  148. 502 MPI build help
  149. Water Jacketed vs Water Injected
  150. Rinda Scanner Adapter Won't Fit 525 Diagnostic Conn.
  151. Dyno tuning technic
  152. Small block ignition
  153. 575 sci piston
  154. Smartcraft gauge options
  155. repairing acrylic wind screen?
  156. 28 Nordic, 29 Warlock, 288 Sunsation
  157. Low budget 7.4 rebuild
  158. Oil pressure...
  159. Air into engine is 130-150 deg
  160. Afr
  161. Engine Starving for air?
  162. Looking for help with one of my motors
  163. Bravo 1 upper gear set clutch timing question??
  164. oil temp pick up location
  165. Need your help! Engine bogging while accelerating
  166. What height should K planes be above the running surface. Pro and con for dif heights
  167. Offshore Mounts
  168. 07 496ho swap. Tach does not work. Need HELP!!
  169. Ball park how much does a pair of 350 hour Mercruiser 575 SCi go for?
  170. 1993 454 Magnum - Proper Engine Temp?
  171. Oil psi sender Question
  172. Exhaust Tips
  173. 1992 Fountain 32 Fever
  174. Identify these sea strainers
  175. pressure treated wood
  176. 1998 baja 272 502mpi top rpms
  177. Value of 525 log block
  178. How to cannect throttle shift cables To zero effort morse controls
  179. Hardin Marine exhaust
  180. Trouble Starting
  181. What do these tail pipes belong to?
  182. Gauge pointer oops!
  183. 2003 496 HO Fuel Pressure Issue
  184. Sea Strainers
  185. Lexan thickness
  186. 525 efi rebuild cost
  187. Batteries
  188. 496Mag pinging/detonating
  189. Carbed hp500 fuel pump
  190. Does when in forward but not reverse
  191. Anything I should do before rebuilding bw 71c 1:1 powered by 454 efi mag?
  192. Codes 42 and 43 on 502 MAG MPI. 1995 SN OF764XXX
  193. Pfm inercooler's
  194. 2006 Seadoo GTI 4-Tec
  195. Mercury Racing 600sci oil pressure problem
  196. Fuel pick-up setups
  197. TRS to Bravo Flywheel help
  198. 2004 Merc 575 warning siren won't go away
  199. lowrance 3500 depth finder?
  200. 502 MPI 415 HP cam upgrade
  201. Mercury 525efi wont rev over 4000rpm
  202. 502 MPI stumbles/dies at idle
  203. Pair of 500 hour 1999 502's needing(i think) new manifolds
  204. Timing On 1996 350 MAG GEN+ 300HP
  205. Dominator old vs new
  206. Jetting, Power Valves, AFRs --------
  207. Engine Sound "management"
  208. Dash Switches Replacement
  209. Dominator Carb tuning
  210. rapidly fluctuating temp gauge - SBC
  211. What is a good GPS app for my Android?
  212. Mercruiser 496 HO Alarm beep
  213. 350 MAG upgrade
  214. USCG - friendly fuel pump setups--- EFI into carbed boat
  215. Volvo penta 4.3 gxi
  216. Honest Motor Rebuilders
  217. tether clip, where do you get these?
  218. Plug question on 906/062 SB Vortex heads
  219. 5.7 Tuning Help!
  220. Hp 500 EFI Timeing How Much Is To Much?
  221. 525 SC spark issues
  222. Maiden voyage.
  223. Better cam
  224. Rough HP / Torque Estimate?
  225. '96 Mercruiser 7.4 LX (FI) Water Pressure Gauge, Info. Request
  226. 871 blower rebuilt spec
  227. cougar mtr 27 1988
  228. Mercruiser 502 mpi mag rich idle low vacuum new rebuild
  229. Liquid speedometer
  230. What kind of exhaust do I have, and what are options for silencers?
  231. Do all 496's have water pressure sensors ?
  232. Drives not even height, bravo 1 adjustment
  233. Need help...engine hesitation while accelerating
  234. New 502 engine shuts off in Base Timing Mode
  235. overdriven vs underdriven blower jetting
  236. Mounting remote PS reservoir
  237. Head gasket?
  238. 2 beeps every 2 minutes on Mercruiser 5.7 mag
  239. oil thermostat opening temperature is appropriate?
  240. Ignition Boxes
  241. Procharger problems
  242. 496HO Double Beep Alarm
  243. 525 EFI rebuild
  244. 525 efi bore
  245. Help finding a used Thunderbolt IV V8 V24 module and wire harnes.
  246. Is my 500 efi done for the year? Got hot and now hard to start.
  247. 5.7 spark plug recommendations
  248. Michigan wheel ballistic xhs 4 blade any good?
  249. Looking for help on my 502
  250. Painting or protecting Mercruiser Gil risers
  251. 454 fresh water cooling
  252. Rock inside the lower ?
  253. Water pressure dumps location in plumbing
  254. 600sci/700sci Crank Position Sensor Code
  255. -2 Sports Master Lower with 1.36 gear ratio
  256. Timing settings
  257. bad motor?
  258. Pachanga 22 exhaust question
  259. Pachanga 22 exhaust question
  260. Anyone ever heard of an omega
  261. TRS Mercury-Mercruiser 62782A4 UNIVERSAL JOINT
  262. 850 sci - 1075 sci cam specs
  263. Water circulation with stainless marine manifolds
  264. Water in LH bank/manifod from no flapper, what to check?
  265. procharger vs tbs250
  266. Milky oil
  267. Another day of great fun... maybe not so much. WTH?!
  268. starter fuse
  269. MSD distributor
  270. Pachanga 22 Build.. Help?!
  271. Audio warning system
  272. Using Thunderbolt V with 502 Gen 6 and Procharger M1-SC in the Land Down Under
  273. Any diagrams around on how the water plumbing goes for the engine and chiller?
  274. Where can I find this plastic fitting that goes in valve cover to flame arrestor.
  275. bad 525 EFI heat exchanger ?
  276. Engine Rebuild -- What's Actually Involved
  277. What fuel line can I use?
  278. Oil Temps
  279. anyone ever have a sound like this ?
  280. weighed the boat today
  281. Engines shut down at 4300-4500 rpm
  282. Blown coupler or spun hub .... Before I bring to the shop
  283. Jetting question. Primaries larger than secondaries
  284. Thunderbolt 5 replacement - MSD ?
  285. Repair bad ECU V6 MPI PCM 555
  286. Taylor Made Fenders/Bouy Warranty
  287. PCV Hose question
  288. Where's the best place to buy SB Vortex 906 heads?
  289. Dart or Chevrolet Performance??
  290. I need a IAC part number
  291. I have a merc 525 engine miss at 4800
  292. water pressure drop with rpm increase?
  293. HOLLEY EFI - THIS is real wierd
  294. Engine OIl Prelube Plumbing
  295. Hydraulic Roller Lifter Lash Settings with Shaft Mount Mockers?
  296. Fume sensor possible error
  297. Merc 496 Electrical Issue - Ignition
  298. 454 Mag Leak/Compression numbers
  299. Thread lubricant, sealents and gasket tack for upper end assembly
  300. machine marine steering ram disassembly
  301. Valve "stuck" in 525
  302. are top mount starter flywheels different
  303. 2000 Fountain Fever Bilge pump
  304. 871 rear bearing plate sealant
  305. High Oil Temp - Chasing a ghost/sender?
  306. Titanium Intake valves $$$$
  307. MLS Headgasket measurement VS Bore size and availability
  308. mercruiser computer reprogram
  309. Looking for more horsepower input
  310. Another 525 water pressure question
  311. Blew a trs today
  312. Rattle from back of motor????
  313. Was having a good day until...
  314. Do tall decks have raised Camshafts?
  315. 525 header getting hot
  316. Intake air temperatures with blowers.
  317. Thermostats in a blown application?
  318. procharger innercooler problems
  319. Off the shelf Cam- Dyno results
  320. Will Ported 308 Dart Iron Eagles work on a 565CI or even 582Ci motor?
  321. Testing fuel tank
  322. Will Ported 308 Iron Eagle Dart heads work on a 565?
  323. Bravo x to Bravo XR exchange?
  324. Help with trim tab installation (correct angle)
  325. Need prop selection HELP 99 Python.
  326. mercruiser power steering issue bravo
  327. Identifying a cam
  328. Electrical help!
  329. Bleeding Air from my hydraulic steering
  330. TPS Voltage for idle on a 525 efi?
  331. Sierra oilpan?
  332. Let's talk ignition
  333. new to owning a boat got a boat that needs love coming
  334. NA 555 build CR
  335. 496 starter bolts?
  336. clearence issues with 20.5 sport skier 496 need help
  337. Trim tab angle question (how high is high enough?)
  338. Water pressure issues!
  339. Boat stalls out around 3000 Rpm
  340. HELP! 87 wellcraft nova wiring schematic needed
  341. sierra extreme lower shift cable - know issues? mine broke
  342. Trim solenoid question????
  343. Jesel Belt Drive, Crank turns Cam and Belt Stationary
  344. 502 Dead Stalls above 2400 RPM - Need Help!
  345. Jesel cam belt drive in a marine/endurance application.
  346. 2005 525 starting issue
  347. Strange drive noise
  348. Holley 800 DP running rich at idle - causes?
  349. Which one?
  350. Proper cam choice. What does it mean?
  351. Spark plug gap confusion, 502MPI
  352. 575SCi
  353. Has anyone used Ethanol Shield?
  354. Add on steering issue. Please help!
  355. Have I been Hoodwinked?
  356. Need Help with Location of Thermostats in 500 EFI
  357. Lazy RPM on 396 stroker chevy
  358. carpet
  359. Trim pump fluid?
  360. looking for piece that goes on back of m3 procharger
  361. 496 ho surging/rough idle
  362. need mechanic, cape canaveral area
  363. 1997 2.5 260 EFI idle and start issues
  364. Filling gear lube reservoir
  365. Brand new quick fuel carbs engines won't run
  366. Need help identifying a motor - 572 or 454?
  367. clear (dry or glazed) plug fouling??? Stumped....
  368. Steering cable and helm upgrade, has anyone used the HPS or EXTREME (seestar teleflex
  369. What are symtoms of power steering pump going and/or not working well??
  370. Mysterious oil leak. Gen VI 502 crate motor
  371. West Coast Offshore - Anyone know anything about them?
  372. Any speedo tube fixes
  373. Bravo Rattle - Alignment Woes
  374. 502 injectors
  375. Stainless marine Water pressure test pressure?! Help!!'
  376. Installing a dual relay assembly to speed up my actuator (confused on switch wiring)
  377. 500 efi noise re-visited
  378. Is there a special alignment tool for this coupler?
  379. Working on solving water pressure problem
  380. Ignition issues 420 merc
  381. How do you stop reversion?
  382. 3k RPM+ Bogging Issue '96 7.4LX MPI
  383. Stanless Steel Welding- in Northern Indiana
  384. 2007 Suzuki DF250 milkshake
  385. Comp Cams - Issues with rocker arms, premature failure.
  386. smoking gun clear youre messages
  387. Question on aftermarket exhaust and risers
  388. 525 upgrade question
  389. Exhaust water flow question?
  390. water pressure problem
  391. any jet ski tech's here
  392. sunpad hinge
  393. 496 manifolds on a carbed 454
  394. New Gen 7 540 forged shortblock offering!
  395. Drones in Zaks bay NY
  396. NGK 5673-7 or -8?
  397. 496 HO coolant?
  398. O2 sensors dead after short use???
  399. Dual helm steering problems
  400. Fuel presure on 496 ho
  401. Drive wouldnt lower or raise
  402. Aeromotive Fuel Pump - Losing pressure
  403. Performance problems
  404. 496 HO won't run above 4100 rpm
  405. Need Starter Advise gm572
  406. 500 efi will not rev beyond 4300 rpm
  407. 575sci running rough
  408. Another 496 alarm thread!!!!!
  409. Whipped charger
  410. Marine grade wiring?
  411. taking mild thunders advice
  412. rotella oil
  413. water pressure too high
  414. 496 Mag HO WInterization Questions
  415. Alarm wont stop sounding ? Any ideas why ?
  416. What are my cam specs?
  417. Another Reversion issue with Gil Risers
  418. Convert 496 H.O. Mercruiser to MAG
  419. 500EFI starts to fall flat after 2500rpm -Anybody?
  420. Oil change with oil cooler under motor
  421. $200 Mechanical survey saved me 15k!
  422. 496 fuel injector problem
  423. shift cable end
  424. Help with Corsa Exhausf Baffles!
  425. New hydraulic steering install hooking up rams
  426. Bleeding hydraulic steering
  427. 383 Small block with EMI Thunder and +3" stainless risers, Cooling water flow
  428. New Hydraulic Steering Install - No Pressure and Other Rigging Questions
  429. 525EFI question
  430. Hydraulic steering return line
  431. First time poster with possible spun hub
  432. What are these?
  433. Filling Outdrive with Gear Oil using pressure?
  434. DUI Timing adjustment help..... and MSD parts interchangeable?
  435. A couple 575 sci questions
  436. Carb size
  437. is this a good cam/set up for my 454?
  438. Crane 741 in a 500 efi
  439. Camshaft
  440. engines guys chine in please
  441. Gaffrig GPS Speedometer
  442. Smart Guys - how about a 500HP budget recipe?
  443. 496 Mag Heat Exchanger
  444. Kodiak big block exhaust manifolds any good?
  445. Hydraulic steering set up..
  446. IMCO Fuel Valve/Tank Selector Problems
  447. exhaust elbow tube extensions - slash cut questions
  448. Will this boat have water reversion issues?
  449. Best source for SS Rub Rail?
  450. Performance distributors Ignition timing
  451. zero effort control parts
  452. Holley EFI - global file for 598
  453. Newbie needs advice on which boat
  454. 575sci refresh
  455. Holley EFI in a boat - Doesn't Repeat
  456. 88 Baja stalls at high rpm
  457. 454 Magnum cooling issue
  458. Stbrd Motor will not crank over!
  459. some 4150/4500 dyno info
  460. would you notice 100 more ft.lb. torque
  461. Hydraulic steering Opinions and advice
  462. 500 EFI limitations?
  463. Bravo U-Joints - Older Drive
  464. Water pressure bypass
  465. 496 issue - loss of power to fuel pump?
  466. TRS anodes
  467. BBC 555 dart vs rpm intake
  468. Question for MegaSquirt users
  469. Spark plug wires
  470. 496 ho intermittent stalling above idle
  471. Need help - What head gasket for Chevy 350 bored .40 over.
  472. Easy buddies on the drive - what grease
  473. Mercruiser Aluminum 496 manifolds with out water rail worth $450?
  474. Hatch Actuator Issue
  475. Thunderbolt IV ignition problem
  476. One riser hotter topic
  477. Leaking Gil Sea Strainers
  478. Is there any fairly easy upgrades I can do to a 454 efi 385hp magnum?
  479. Who makes cast iron oval port after market heads?
  480. Livorsi Trim Question: Goes down, trailer needed for up
  481. 500 efi rebuild?
  482. 2011 verado 300 help, vibration when in drive
  483. Pertronix ignitor III ignition opinions
  484. Best Price on sbc GLM aluminum manifolds and risers
  485. Refreshed and are now ready to install
  486. 496HO Fuel Filters
  487. 500EFI Dies after 30 seconds to 3 minutes
  488. Can Oil Pressure Gauge be used as Fuel pressure Gauge?
  489. Speaker boxes
  490. MEFI 1 350 issues
  491. kiekhaefer throttle rebuild.
  492. Cherokee Power Boats (26' "Dylan")- Anyone know anything?
  493. Hydraulic Steering Fittings
  494. Will 496 mag DTS-box work with ordinary wire gas-trottle?
  495. BBC - Blue Print Blocks
  496. What are people using for under platform swim ladders?
  497. 496 ho won't start
  498. Help, mercruiser wont rev
  499. whats the best way to trim both drives with one switch?
  500. Drive trim