Engine Timing - Starts hard

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   The engine (351W) in my 76 seems to turn over hard after the engine is hot.  That is, after skiing for an hour and shutting the engine off while changing skiers, the engine tends to turn over hard.  The boat runs absolutely perfect on the water.   

It starts fine or normal when it's cold.    If I hook a hose up to it on in the driveway and let it get to temp and then shut it off, let it sit for a few and then it will restart fine.   

The timing is set at ~10 degrees, assuming my timing light is accurate.  Should I back my timing to 9 degrees and see if it will start easier or will that make it worse?

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Hydrofoilmaniac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: April-15-2006 Location: United States Status: Offline Points: 17	Post Options Post Reply Quote Hydrofoilmaniac Report Post Thanks(0) Quote Reply Topic: Engine Timing - Starts hard Posted: April-16-2007 at 6:20am
	The engine (351W) in my 76 seems to turn over hard after the engine is hot. That is, after skiing for an hour and shutting the engine off while changing skiers, the engine tends to turn over hard. The boat runs absolutely perfect on the water. It starts fine or normal when it's cold. If I hook a hose up to it on in the driveway and let it get to temp and then shut it off, let it sit for a few and then it will restart fine. The timing is set at ~10 degrees, assuming my timing light is accurate. Should I back my timing to 9 degrees and see if it will start easier or will that make it worse?


eric lavine Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413	Post Options Post Reply Quote eric lavine Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 7:37am
	dont rule out the starter, it may be getting a hot spot, timing is too close to give it a problem unless like you said your timiing light is off, do yoo have to pump it alot or is the starter just turning over slower?
	"the things you own will start to own you"

JoeinNY Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698	Post Options Post Reply Quote JoeinNY Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 9:20am
	If nothing else works people have reported the same symptoms from a small leak in the exhaust manifolds. I hope and doubt thats not the case but it wouldnt be the first time. -Joe.
	1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" Holeshot Video

bmiller Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-05-2006 Location: United States Status: Offline Points: 234	Post Options Post Reply Quote bmiller Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 10:44am
	When you shut the engine off check your back two barrels on your carb and make sure your not having raw fuel dumping into the intake manifold causing it to flood.I had this happen on my 302 in my 78 mustang causing a hard starting problem.It would start fine when it was cold also,just something to check.If thats the case your floats may be out of adjustment.

GottaSki Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3363	Post Options Post Reply Quote GottaSki Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 4:22pm
	Yes, a degree or two less is an easy thing to try. I've seen too much initial cause your poor hot crank symptoms frequently.
	"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole

Munday Members Profile Send Private Message Find Members Posts Add to Buddy List Gold Member Joined: August-17-2004 Location: United States Status: Offline Points: 538	Post Options Post Reply Quote Munday Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 5:28pm
	If you think you have to much advance,next time its hard starting pull the coil wire to kill ignition.If it spins freely with no ignition you may have disstributer advance problems that springs are overcoming at rest Munday

Hydrofoilmaniac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: April-15-2006 Location: United States Status: Offline Points: 17	Post Options Post Reply Quote Hydrofoilmaniac Report Post Thanks(0) Quote Reply Posted: April-16-2007 at 9:54pm
	Great tips. Thanks for the help.

Engine Timing - Starts hard

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