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Louie, Technician
Category: Motorcycle
Satisfied Customers: 12437
Experience:  25+ yrs. experience
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I have a Polaris sportsman 500 4 x 4 atv it is very hard to

Customer Question

I have a Polaris sportsman 500 4 x 4 atv it is very hard to start it has new gas and a new carburetor. what can be the problem
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: no not a gas hog. always hard to start but worse lately
JA: What is the model/year of your motorcycle?
Customer: 1998 Polaris sportsman 500 4 x 4
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes hoping to fix myself. have put in new gas, check and adjusted carb. after it does start it runs great just a starting issue
JA: Anything else you think the mechanic should know?
Customer: no not that I can think of
Submitted: 1 year ago.
Category: Motorcycle
Expert:  Louie replied 1 year ago.

Hi and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially, proposed preliminary tries (if have not been done) of before a fresh / new start:

  • • carefully remove the spark plug;
  • • cautiously perform a spark test;
  • • crank and note if fuel enters the combustion chamber.
  • • check the burn color of the spark plug's inner ceramic tip;
  • - if black/sooty, then rich and/or vacuum leak issue @ the intake/after the carb;
  • - if oily, then an internal engine problem;
  • * consider a compression test or better yet, a leakdown test;
  • - if very light brown to whitish, then lean and/or an air leak concern @ air box/coupling/before the carb;
  • • re-clean the fuel path including filters and fuel pump, drain the tank and replace again with fresh fuel;
  • • consider re-doing - soak and re-clean the carb particularly off varnish like residue;
  • • verify contents/quantity of fuel at the carb bowl through the drain hose;
  • • check the air box and air filter/element;
  • - ensure tight/correct fit;
  • - verify air entry is only through the designated air box opening.