Honda B100 won't start.

[Mark Crane]

I'm pretty sure I've got the timing right now. (See Honda B100 Timing) The cam had a dot and I found the dot on cylinder head. The T is lined up with mark on rear boss. The plugs fire when out of the head. To avoid carburetor issues I'm spraying starter fluid in the intake. Could the compression be so bad that it still won't start? It doesn't even sputter..

 

[Mark Crane]

Re: Honda B100 won't start.

Since I don't get replys I'll put it out on the road with the rest of my hurricane debris.

 

[Silvertip]

Re: Honda B100 won't start.

You really need a service manual to make sure you have this right. If you have fuel and spark, it should run. For all you know you are 180 degrees out of time since the camshaft runs at 1/2 crankshaft speed. Check your local library.

 

[Mark Crane]

Re: Honda B100 won't start.

Thanks Upinsmoke. I've been contemplating investing in a manual but the reviews on the Seloc manual are poor, and an OMC manual has to be ordered if available at all. I tried it again at 180 degrees difference and still no luck. The engine was siezed up after sitting with saltwater in it. After two days of soaking the cylinders in WD40 I was able to free it up but I imagine everything inside is corroded and nothing seals. I don't want to invest too much in what is probably a lost cause.

 

[Silvertip]

Re: Honda B100 won't start.

Why OMC manual. You are working on a Honda. Have you done a compression test on this motor? Actually, if the cam timing is not correct that may not prove anything. I think you still have a timing issue. Pull number one plug. Using a wooden dowl, insert it into the spark plug hole and slowly rotate the flywheel and let the piston push the dowel out. When the piston reaches the top of the stroke, check the flywheel markings (set it on temporarily if you have it off). Rotate the engine slightly to ensure you are exactly at TDC (0 degrees). At least now you know the crank is right. Now you need to make sure the cam is located properly and here is where you can be either correct or 180 degrees out. Only the markings will tell you and at this point I can no longer help because I don't know the markings on the Honda engines. You could pull a cam cover and check the valves. When the valves are closed on number one, the cam is correct so long as the markings on the cam align with their designated marks on the block (or on the crank gear). Keep trying.

 

[Mark Crane]

Re: Honda B100 won't start.

Thanks again Upinsmoke. I'm not sure why but I tried it again and it started. From earlier posts and the FAQ link I read that both cylinders fire simultaniously so I wonder if 180 degrees out is possible. I've got the carb soaking in parts cleaner until I get back in town next week end to resume this project.