Rodbolt, Please take a look. 1986 Suzuki DT75 cranking hard, won't start.

[phonephreak]

At first I thought battery. Took battery out of my truck, same problem. Added additional starting power w/jmpr cables, still cranks hard w/o starting. Then I thought corroded connections. Cleaned everything and even bypassed existing wiring to starter w/4 gauge wire(both power and ground), no change. I have fuel and spark. When I pull the plugs, it turns over easily. After looking through the manual, I tested the pulser coil which said that the yellow and red wires should meter out between 320 and 391 ohms. It metered at 700 ohms. Is this enough to cause the problem? The second test in the manual w/ the white and red wires checked out at 350 ohms. 2 weeks ago it was hard to start but when it got started it ran fine, except at idle where it died a few ties while I was trolling. It seems now that it is maybe firing wrong so that it is actually working against itself in trying to start.

 

[phonephreak]

Re: 1986 Suzuki DT75 cranking hard, won't start.

Re: 1986 Suzuki DT75 cranking hard, won't start.

Does the oil feeding each carb drain back? The oil line is full to the oil pump, but the feed to each carb has oil right at the carb but is empty in the middle of each hose. Also I disconnected the plug wires from the plugs and it still turns over hard, so I don't think it is a firing problem. I hope it isn't the oil injection and the engine is damaged.

 

[phonephreak]

Re: 1986 Suzuki DT75 cranking hard, won't start.

Re: 1986 Suzuki DT75 cranking hard, won't start.

Does the oil feeding each carb drain back? The oil line is full to the oil pump, but the feed to each carb has oil right at the carb but is empty in the middle of each hose. Also I disconnected the plug wires from the plugs and it still turns over hard, so I don't think it is a firing problem. I hope it isn't the oil injection and the engine is damaged.

 

[phonephreak]

Re: 1986 Suzuki DT75 cranking hard, won't start. PLEASE HELP!

Re: 1986 Suzuki DT75 cranking hard, won't start. PLEASE HELP!

I am hoping someone can help me. My boat has been out of service for 3 months now. I am trying to avoid driving my boat 30 miles to take it to a shop and pay an arm and a leg to get it fixed. Please help.

 

[rodbolt]

Re: Rodbolt, Please take a look. 1986 Suzuki DT75 cranking hard, won't start.

it should be very easy to turn over with the plugs out. do a compression test.
it could also be the lower unit binding up.