Merc 150hp on my SeaPro

[Deleted]

I've got a Mercury 2007 150 hp 4 stroke on my Sea Pro. I've been having some sort of engine problems that has my mechanic and myself baffeled. The last few times off shore I've taken my boat out about 20 miles and it's run just fine for 5-6 hrs, but each time on the way back in it starts hestitating and puttering like it's not getting gas properly. Each time I get it back home or to the mechanics it runs fine. The problem seems to arise after some extended usuage. Has anyone run across the same problem or have any suggestions? Thanks.

[Deleted]

When does the problem start? When you fire up to head home and then after a while the hesitating goes away ?? Are you running alot of electronics out there and dragging down your battery(s). I read some where that those Mercs are voltage sensitive and need alot of power to keep them running. Perhaps your alternator is recharging your depleted batterys and is not feeding enough juice to run the motor as it should. Once the batteries have enough charge back in them the motor runs as it should ?? That would account for not being able to find a problem.

[Deleted]

I picked this of of "Continuous Wave" for you: the Verado motor is a heavy consumer of electrical energy because it uses an electro-hydraulic boost pump to help with the steering. The Verado motors are very heavy and greatly benefit from having a power-boosted steering sytem, but this imposes additional electrical drain on the battery. A lot of electrical energy is needed by the boost pump to provide all that power steering energy.

Also, the Verado motor does not have high charging current available at low engine speeds, so at extended low-speed operation, and particularly when a lot of steering is being done, the battery may not receive much charging current. When the Verado motor speeds up, it can provide much higher charging current, perhaps as much as 50-amperes.

[Deleted]

This thread: www.thehulltruth.com/boating-forum/289978-mercury-250-proxs-2008-lack-power.html talks about batteries and how LOW VOLTAGE will fry your coils .........

I hope I have provided some insight and a place for you to begin looking for a solution to your problem.

[Simple Man]

Boe-boe batteries might indeed be your problem but the 4 cylinder V-rods do not have power steering as standard equipment. It is an option though and you might have it on your boat. If you do not have the power steering as an option, the power requirements for your motor would be no different from any other make.

[Deleted]

Be sure to let us know what the cause of you problem was when you get this sorted out !!! Someone else may have a similiar problem and you may hold his answer. That is what this forum is all about ............. Helping each other.