Striper500
Seaman
- Joined
- Nov 20, 2005
- Messages
- 52
I have posted other problems - misfire loud popping etc - finally did a Sync & Link and engine runs smooth as silk at idle and at 2500 - now all 4 plugs are burning equal and I would say on the wet side. But - that's it can't get her on plane, can't rev over 2500 at WOT. All checks were done in the water after engine was warm - This was the 1st compression check warm - 3 at 125 1 at 120 - all close. I ran the engine at idle with the silencer off and put my hand on each carb and found good suction - I was told compression could lie so check to see if I had good suction - this checked out. So far electrically everything checks out - all tests with a high peak volt meter on the stator, timer base, and power pack. I bought this boat used so everything is a mystery or a challenge. I have no history. I suspect an air, vacuum leak or fuel pressure leak. Note at idle you can rev no problem - of course it's not under load. I tried choking with the key at 2500 RPM under load - no change. Also for starters I did the triple play for temperature - 2 stats and a new water pump to insure = and proper operating temp. I tried a few more electrical tests while running - disconnecting Black & Yellow - no change, disconnected White & black on port stat - no change, Even disconnected tan wires - I did not however disconnect tan off VRO - didn't have the manual with me & wasn't sure if it was tied into the SLOW system. Next week I will check all hoses - Electronics I can hold my own - fuel systems I have a lot of questions.
Regarding fuel - there is a new spin on filter and a new ball, when I prime the fuel I did see leakage at the line to the fuel rail at the T which feeds the choke cellunoid - Only when I 'm squeezing the ball and applying pressure- I tightened it with a straps on the nipple. also - I will shorten that line next week after 10 years I guess the hoses should either be replaced or tightened. This was a preformed hose.
Can the thin diameter hose coming off the cylinders that go to the carbs cause a problem under load ? Will the intermediate orifices (no needle - fixed orifice) be a problem at WOT ? - Last week I dumped the High speed plugs and drained the carbs - didn't see any problems - I'm not a carb rebuilder so I would like to do that last. Can I assume under load there is a much greater draw - vacuum & fuel wise hence replace or tighten up lines ?? - It amazes me how the small hoses are on the fittings not clamped to the carbs and Powerhead etc - Also I don;t have a fuel fitting with orings - Main fuel line attaches right to motor - I know these orings go bad. I also tried pumping ball at WOT - nothing happened. This may be a dumb question - The engine ran so smooth at 2500 RPM - for those that know I have spark when I check it at the dock - but will these V4 loopers run that smooth if I'm losing spark at WOT ?
Before I take every line apart - remove valve that feeds VRO etc - any usual culprits here ????? By the way this engine has fixed orifices for idle & intermediate - no adjustment.
Any help would be appreceiated -
Regarding fuel - there is a new spin on filter and a new ball, when I prime the fuel I did see leakage at the line to the fuel rail at the T which feeds the choke cellunoid - Only when I 'm squeezing the ball and applying pressure- I tightened it with a straps on the nipple. also - I will shorten that line next week after 10 years I guess the hoses should either be replaced or tightened. This was a preformed hose.
Can the thin diameter hose coming off the cylinders that go to the carbs cause a problem under load ? Will the intermediate orifices (no needle - fixed orifice) be a problem at WOT ? - Last week I dumped the High speed plugs and drained the carbs - didn't see any problems - I'm not a carb rebuilder so I would like to do that last. Can I assume under load there is a much greater draw - vacuum & fuel wise hence replace or tighten up lines ?? - It amazes me how the small hoses are on the fittings not clamped to the carbs and Powerhead etc - Also I don;t have a fuel fitting with orings - Main fuel line attaches right to motor - I know these orings go bad. I also tried pumping ball at WOT - nothing happened. This may be a dumb question - The engine ran so smooth at 2500 RPM - for those that know I have spark when I check it at the dock - but will these V4 loopers run that smooth if I'm losing spark at WOT ?
Before I take every line apart - remove valve that feeds VRO etc - any usual culprits here ????? By the way this engine has fixed orifices for idle & intermediate - no adjustment.
Any help would be appreceiated -